doc: python bindings howto

* Another retrofitting of the HOWTO Python example code, this time
  following adjustments to python-mode configuration and having
  trawled through the org-mode mailing lists for clues.

1 files changed, 623 insertions, 624 deletions

diff --git a/lang/python/docs/GPGMEpythonHOWTOen.org b/lang/python/docs/GPGMEpythonHOWTOen.org
index df37226b..c40772f2 100644
--- a/lang/python/docs/GPGMEpythonHOWTOen.org
+++ b/lang/python/docs/GPGMEpythonHOWTOen.org
@@ -340,40 +340,40 @@ pattern is upper or lower case.
 
 So this is the best method:
 
-#+begin_src python
-  import gpg
+#+begin_src python -i
+import gpg
 
-  k = gpg.Context().keylist(pattern="258E88DCBD3CD44D8E7AB43F6ECB6AF0DEADBEEF")
-  keys = list(k)
+k = gpg.Context().keylist(pattern="258E88DCBD3CD44D8E7AB43F6ECB6AF0DEADBEEF")
+keys = list(k)
 #+end_src
 
 This is passable and very likely to be common:
 
-#+begin_src python
-  import gpg
+#+begin_src python -i
+import gpg
 
-  k = gpg.Context().keylist(pattern="0x6ECB6AF0DEADBEEF")
-  keys = list(k)
+k = gpg.Context().keylist(pattern="0x6ECB6AF0DEADBEEF")
+keys = list(k)
 #+end_src
 
 And this is a really bad idea:
 
-#+begin_src python
-  import gpg
+#+begin_src python -i
+import gpg
 
-  k = gpg.Context().keylist(pattern="0xDEADBEEF")
-  keys = list(k)
+k = gpg.Context().keylist(pattern="0xDEADBEEF")
+keys = list(k)
 #+end_src
 
 Alternatively it may be that the intention is to create a list of keys
 which all match a particular search string.  For instance all the
 addresses at a particular domain, like this:
 
-#+begin_src python
-  import gpg
+#+begin_src python -i
+import gpg
 
-  ncsc = gpg.Context().keylist(pattern="ncsc.mil")
-  nsa = list(ncsc)
+ncsc = gpg.Context().keylist(pattern="ncsc.mil")
+nsa = list(ncsc)
 #+end_src
 
 
@@ -386,23 +386,23 @@ Counting the number of keys in your public keybox (=pubring.kbx=), the
 format which has superseded the old keyring format (=pubring.gpg= and
 =secring.gpg=), or the number of secret keys is a very simple task.
 
-#+begin_src python
-  import gpg
+#+begin_src python -i
+import gpg
 
-  c = gpg.Context()
-  seckeys = c.keylist(pattern=None, secret=True)
-  pubkeys = c.keylist(pattern=None, secret=False)
+c = gpg.Context()
+seckeys = c.keylist(pattern=None, secret=True)
+pubkeys = c.keylist(pattern=None, secret=False)
 
-  seclist = list(seckeys)
-  secnum = len(seclist)
+seclist = list(seckeys)
+secnum = len(seclist)
 
-  publist = list(pubkeys)
-  pubnum = len(publist)
+publist = list(pubkeys)
+pubnum = len(publist)
 
-  print("""
+print("""
   Number of secret keys:  {0}
   Number of public keys:  {1}
-  """.format(secnum, pubnum))
+""".format(secnum, pubnum))
 #+end_src
 
 
@@ -424,21 +424,21 @@ secret keys as well.
 This first example demonstrates selecting the current key of Werner
 Koch, which is due to expire at the end of 2018:
 
-#+begin_src python
-  import gpg
+#+begin_src python -i
+import gpg
 
-  fingerprint = "80615870F5BAD690333686D0F2AD85AC1E42B367"
-  key = gpg.Context().get_key(fingerprint)
+fingerprint = "80615870F5BAD690333686D0F2AD85AC1E42B367"
+key = gpg.Context().get_key(fingerprint)
 #+end_src
 
 Whereas this example demonstrates selecting the author's current key
 with the =secret= key word argument set to =True=:
 
-#+begin_src python
-  import gpg
+#+begin_src python -i
+import gpg
 
-  fingerprint = "DB4724E6FA4286C92B4E55C4321E4E2373590E5D"
-  key = gpg.Context().get_key(fingerprint, secret=True)
+fingerprint = "DB4724E6FA4286C92B4E55C4321E4E2373590E5D"
+key = gpg.Context().get_key(fingerprint, secret=True)
 #+end_src
 
 It is, of course, quite possible to select expired, disabled and
@@ -463,30 +463,30 @@ keyservers via the web using the requests module. Since requests
 returns the content as a bytes literal object, we can then use that
 directly to import the resulting data into our keybox.
 
-#+begin_src python
-  import gpg
-  import os.path
-  import requests
-
-  c = gpg.Context()
-  url = "https://sks-keyservers.net/pks/lookup"
-  pattern = input("Enter the pattern to search for key or user IDs: ")
-  payload = { "op": "get", "search": pattern }
-
-  r = requests.get(url, verify=True, params=payload)
-  result = c.key_import(r.content)
-
-  if result is not None and hasattr(result, "considered") is False:
-      print(result)
-  elif result is not None and hasattr(result, "considered") is True:
-      num_keys = len(result.imports)
-      new_revs = result.new_revocations
-      new_sigs = result.new_signatures
-      new_subs = result.new_sub_keys
-      new_uids = result.new_user_ids
-      new_scrt = result.secret_imported
-      nochange = result.unchanged
-      print("""
+#+begin_src python -i
+import gpg
+import os.path
+import requests
+
+c = gpg.Context()
+url = "https://sks-keyservers.net/pks/lookup"
+pattern = input("Enter the pattern to search for key or user IDs: ")
+payload = { "op": "get", "search": pattern }
+
+r = requests.get(url, verify=True, params=payload)
+result = c.key_import(r.content)
+
+if result is not None and hasattr(result, "considered") is False:
+    print(result)
+elif result is not None and hasattr(result, "considered") is True:
+    num_keys = len(result.imports)
+    new_revs = result.new_revocations
+    new_sigs = result.new_signatures
+    new_subs = result.new_sub_keys
+    new_uids = result.new_user_ids
+    new_scrt = result.secret_imported
+    nochange = result.unchanged
+    print("""
   The total number of keys considered for import was:  {0}
 
      Number of keys revoked:  {1}
@@ -497,13 +497,13 @@ directly to import the resulting data into our keybox.
    Number of unchanged keys:  {6}
 
   The key IDs for all considered keys were:
-  """.format(num_keys, new_revs, new_sigs, new_subs, new_uids, new_scrt,
-	     nochange))
-      for i in range(num_keys):
-	  print(result.imports[i].fpr)
-	  print("")
-  else:
-      pass
+""".format(num_keys, new_revs, new_sigs, new_subs, new_uids, new_scrt,
+	   nochange))
+    for i in range(num_keys):
+	print(result.imports[i].fpr)
+	print("")
+else:
+    pass
 #+end_src
 
 *NOTE:* When searching for a key ID of any length or a fingerprint
@@ -538,54 +538,54 @@ alternative, the =key_export_minimal()= method, will do the same thing
 except producing a minimised output with extra signatures and third
 party signatures or certifications removed.
 
-#+begin_src python
-  import gpg
-  import os.path
-  import sys
+#+begin_src python -i
+import gpg
+import os.path
+import sys
 
-  print("""
+print("""
   This script exports one or more public keys.
-  """)
-
-  c = gpg.Context(armor=True)
-
-  if len(sys.argv) >= 4:
-      keyfile = sys.argv[1]
-      logrus = sys.argv[2]
-      homedir = sys.argv[3]
-  elif len(sys.argv) == 3:
-      keyfile = sys.argv[1]
-      logrus = sys.argv[2]
-      homedir = input("Enter the GPG configuration directory path (optional): ")
-  elif len(sys.argv) == 2:
-      keyfile = sys.argv[1]
-      logrus = input("Enter the UID matching the key(s) to export: ")
-      homedir = input("Enter the GPG configuration directory path (optional): ")
-  else:
-      keyfile = input("Enter the path and filename to save the secret key to: ")
-      logrus = input("Enter the UID matching the key(s) to export: ")
-      homedir = input("Enter the GPG configuration directory path (optional): ")
-
-  if homedir.startswith("~"):
-      if os.path.exists(os.path.expanduser(homedir)) is True:
-	  c.home_dir = os.path.expanduser(homedir)
-      else:
-	  pass
-  elif os.path.exists(homedir) is True:
-      c.home_dir = homedir
-  else:
-      pass
-
-  try:
-      result = c.key_export(pattern=logrus)
-  except:
-      result = c.key_export(pattern=None)
-
-  if result is not None:
-      with open(keyfile, "wb") as f:
-	  f.write(result)
-  else:
-      pass
+""")
+
+c = gpg.Context(armor=True)
+
+if len(sys.argv) >= 4:
+    keyfile = sys.argv[1]
+    logrus = sys.argv[2]
+    homedir = sys.argv[3]
+elif len(sys.argv) == 3:
+    keyfile = sys.argv[1]
+    logrus = sys.argv[2]
+    homedir = input("Enter the GPG configuration directory path (optional): ")
+elif len(sys.argv) == 2:
+    keyfile = sys.argv[1]
+    logrus = input("Enter the UID matching the key(s) to export: ")
+    homedir = input("Enter the GPG configuration directory path (optional): ")
+else:
+    keyfile = input("Enter the path and filename to save the secret key to: ")
+    logrus = input("Enter the UID matching the key(s) to export: ")
+    homedir = input("Enter the GPG configuration directory path (optional): ")
+
+if homedir.startswith("~"):
+    if os.path.exists(os.path.expanduser(homedir)) is True:
+	c.home_dir = os.path.expanduser(homedir)
+    else:
+	pass
+elif os.path.exists(homedir) is True:
+    c.home_dir = homedir
+else:
+    pass
+
+try:
+    result = c.key_export(pattern=logrus)
+except:
+    result = c.key_export(pattern=None)
+
+if result is not None:
+    with open(keyfile, "wb") as f:
+	f.write(result)
+else:
+    pass
 #+end_src
 
 It is important to note that the result will only return =None= when a
@@ -593,54 +593,54 @@ pattern has been entered for =logrus=, but it has not matched any
 keys. When the search pattern itself is set to =None= this triggers
 the exporting of the entire public keybox.
 
-#+begin_src python
-  import gpg
-  import os.path
-  import sys
-
-  print("""
-  This script exports one or more public keys in minimised form.
-  """)
-
-  c = gpg.Context(armor=True)
-
-  if len(sys.argv) >= 4:
-      keyfile = sys.argv[1]
-      logrus = sys.argv[2]
-      homedir = sys.argv[3]
-  elif len(sys.argv) == 3:
-      keyfile = sys.argv[1]
-      logrus = sys.argv[2]
-      homedir = input("Enter the GPG configuration directory path (optional): ")
-  elif len(sys.argv) == 2:
-      keyfile = sys.argv[1]
-      logrus = input("Enter the UID matching the key(s) to export: ")
-      homedir = input("Enter the GPG configuration directory path (optional): ")
-  else:
-      keyfile = input("Enter the path and filename to save the secret key to: ")
-      logrus = input("Enter the UID matching the key(s) to export: ")
-      homedir = input("Enter the GPG configuration directory path (optional): ")
-
-  if homedir.startswith("~"):
-      if os.path.exists(os.path.expanduser(homedir)) is True:
-	  c.home_dir = os.path.expanduser(homedir)
-      else:
-	  pass
-  elif os.path.exists(homedir) is True:
-      c.home_dir = homedir
-  else:
-      pass
-
-  try:
-      result = c.key_export_minimal(pattern=logrus)
-  except:
-      result = c.key_export_minimal(pattern=None)
-
-  if result is not None:
-      with open(keyfile, "wb") as f:
-	  f.write(result)
-  else:
-      pass
+#+begin_src python -i
+import gpg
+import os.path
+import sys
+
+print("""
+This script exports one or more public keys in minimised form.
+""")
+
+c = gpg.Context(armor=True)
+
+if len(sys.argv) >= 4:
+    keyfile = sys.argv[1]
+    logrus = sys.argv[2]
+    homedir = sys.argv[3]
+elif len(sys.argv) == 3:
+    keyfile = sys.argv[1]
+    logrus = sys.argv[2]
+    homedir = input("Enter the GPG configuration directory path (optional): ")
+elif len(sys.argv) == 2:
+    keyfile = sys.argv[1]
+    logrus = input("Enter the UID matching the key(s) to export: ")
+    homedir = input("Enter the GPG configuration directory path (optional): ")
+else:
+    keyfile = input("Enter the path and filename to save the secret key to: ")
+    logrus = input("Enter the UID matching the key(s) to export: ")
+    homedir = input("Enter the GPG configuration directory path (optional): ")
+
+if homedir.startswith("~"):
+    if os.path.exists(os.path.expanduser(homedir)) is True:
+	c.home_dir = os.path.expanduser(homedir)
+    else:
+	pass
+elif os.path.exists(homedir) is True:
+    c.home_dir = homedir
+else:
+    pass
+
+try:
+    result = c.key_export_minimal(pattern=logrus)
+except:
+    result = c.key_export_minimal(pattern=None)
+
+if result is not None:
+    with open(keyfile, "wb") as f:
+	f.write(result)
+else:
+    pass
 #+end_src
 
 
@@ -657,58 +657,58 @@ The following example exports the secret key to a file which is then
 set with the same permissions as the output files created by the
 command line secret key export options.
 
-#+begin_src python
-  import gpg
-  import os
-  import os.path
-  import sys
-
-  print("""
-  This script exports one or more secret keys.
-
-  The gpg-agent and pinentry are invoked to authorise the export.
-  """)
-
-  c = gpg.Context(armor=True)
-
-  if len(sys.argv) >= 4:
-      keyfile = sys.argv[1]
-      logrus = sys.argv[2]
-      homedir = sys.argv[3]
-  elif len(sys.argv) == 3:
-      keyfile = sys.argv[1]
-      logrus = sys.argv[2]
-      homedir = input("Enter the GPG configuration directory path (optional): ")
-  elif len(sys.argv) == 2:
-      keyfile = sys.argv[1]
-      logrus = input("Enter the UID matching the secret key(s) to export: ")
-      homedir = input("Enter the GPG configuration directory path (optional): ")
-  else:
-      keyfile = input("Enter the path and filename to save the secret key to: ")
-      logrus = input("Enter the UID matching the secret key(s) to export: ")
-      homedir = input("Enter the GPG configuration directory path (optional): ")
-
-  if homedir.startswith("~"):
-      if os.path.exists(os.path.expanduser(homedir)) is True:
-	  c.home_dir = os.path.expanduser(homedir)
-      else:
-	  pass
-  elif os.path.exists(homedir) is True:
-      c.home_dir = homedir
-  else:
-      pass
-
-  try:
-      result = c.key_export_secret(pattern=logrus)
-  except:
-      result = c.key_export_secret(pattern=None)
-
-  if result is not None:
-      with open(keyfile, "wb") as f:
-	  f.write(result)
-      os.chmod(keyfile, 0o600)
-  else:
-      pass
+#+begin_src python -i
+import gpg
+import os
+import os.path
+import sys
+
+print("""
+This script exports one or more secret keys.
+
+The gpg-agent and pinentry are invoked to authorise the export.
+""")
+
+c = gpg.Context(armor=True)
+
+if len(sys.argv) >= 4:
+    keyfile = sys.argv[1]
+    logrus = sys.argv[2]
+    homedir = sys.argv[3]
+elif len(sys.argv) == 3:
+    keyfile = sys.argv[1]
+    logrus = sys.argv[2]
+    homedir = input("Enter the GPG configuration directory path (optional): ")
+elif len(sys.argv) == 2:
+    keyfile = sys.argv[1]
+    logrus = input("Enter the UID matching the secret key(s) to export: ")
+    homedir = input("Enter the GPG configuration directory path (optional): ")
+else:
+    keyfile = input("Enter the path and filename to save the secret key to: ")
+    logrus = input("Enter the UID matching the secret key(s) to export: ")
+    homedir = input("Enter the GPG configuration directory path (optional): ")
+
+if homedir.startswith("~"):
+    if os.path.exists(os.path.expanduser(homedir)) is True:
+	c.home_dir = os.path.expanduser(homedir)
+    else:
+	pass
+elif os.path.exists(homedir) is True:
+    c.home_dir = homedir
+else:
+    pass
+
+try:
+    result = c.key_export_secret(pattern=logrus)
+except:
+    result = c.key_export_secret(pattern=None)
+
+if result is not None:
+    with open(keyfile, "wb") as f:
+	f.write(result)
+    os.chmod(keyfile, 0o600)
+else:
+    pass
 #+end_src
 
 Alternatively the approach of the following script can be used.  This
@@ -718,91 +718,91 @@ readable and writable by the user.  It also exports the secret key(s)
 twice in order to output both GPG binary (=.gpg=) and ASCII armoured
 (=.asc=) files.
 
-#+begin_src python
-  import gpg
-  import os
-  import os.path
-  import subprocess
-  import sys
-
-  print("""
-  This script exports one or more secret keys as both ASCII armored and binary
-  file formats, saved in files within the user's GPG home directory.
-
-  The gpg-agent and pinentry are invoked to authorise the export.
-  """)
-
-  if sys.platform == "win32":
-      gpgconfcmd = "gpgconf.exe --list-dirs homedir"
-  else:
-      gpgconfcmd = "gpgconf --list-dirs homedir"
-
-  a = gpg.Context(armor=True)
-  b = gpg.Context()
-  c = gpg.Context()
-
-  if len(sys.argv) >= 4:
-      keyfile = sys.argv[1]
-      logrus = sys.argv[2]
-      homedir = sys.argv[3]
-  elif len(sys.argv) == 3:
-      keyfile = sys.argv[1]
-      logrus = sys.argv[2]
-      homedir = input("Enter the GPG configuration directory path (optional): ")
-  elif len(sys.argv) == 2:
-      keyfile = sys.argv[1]
-      logrus = input("Enter the UID matching the secret key(s) to export: ")
-      homedir = input("Enter the GPG configuration directory path (optional): ")
-  else:
-      keyfile = input("Enter the filename to save the secret key to: ")
-      logrus = input("Enter the UID matching the secret key(s) to export: ")
-      homedir = input("Enter the GPG configuration directory path (optional): ")
-
-  if homedir.startswith("~"):
-      if os.path.exists(os.path.expanduser(homedir)) is True:
-	  c.home_dir = os.path.expanduser(homedir)
-      else:
-	  pass
-  elif os.path.exists(homedir) is True:
-      c.home_dir = homedir
-  else:
-      pass
-
-  if c.home_dir is not None:
-      if c.home_dir.endswith("/"):
-	  gpgfile = "{0}{1}.gpg".format(c.home_dir, keyfile)
-	  ascfile = "{0}{1}.asc".format(c.home_dir, keyfile)
-      else:
-	  gpgfile = "{0}/{1}.gpg".format(c.home_dir, keyfile)
-	  ascfile = "{0}/{1}.asc".format(c.home_dir, keyfile)
-  else:
-      if os.path.exists(os.environ["GNUPGHOME"]) is True:
-	  hd = os.environ["GNUPGHOME"]
-      else:
-	  hd = subprocess.getoutput(gpgconfcmd)
-      gpgfile = "{0}/{1}.gpg".format(hd, keyfile)
-      ascfile = "{0}/{1}.asc".format(hd, keyfile)
-
-  try:
-      a_result = a.key_export_secret(pattern=logrus)
-      b_result = b.key_export_secret(pattern=logrus)
-  except:
-      a_result = a.key_export_secret(pattern=None)
-      b_result = b.key_export_secret(pattern=None)
-
-  if a_result is not None:
-      with open(ascfile, "wb") as f:
-	  f.write(a_result)
-      os.chmod(ascfile, 0o600)
-  else:
-      pass
-
-  if b_result is not None:
-      with open(gpgfile, "wb") as f:
-	  f.write(b_result)
-      os.chmod(gpgfile, 0o600)
-  else:
-      pass
+#+begin_src python -i
+import gpg
+import os
+import os.path
+import subprocess
+import sys
+
+print("""
+This script exports one or more secret keys as both ASCII armored and binary
+file formats, saved in files within the user's GPG home directory.
+
+The gpg-agent and pinentry are invoked to authorise the export.
+""")
+
+if sys.platform == "win32":
+    gpgconfcmd = "gpgconf.exe --list-dirs homedir"
+else:
+    gpgconfcmd = "gpgconf --list-dirs homedir"
+
+a = gpg.Context(armor=True)
+b = gpg.Context()
+c = gpg.Context()
+
+if len(sys.argv) >= 4:
+    keyfile = sys.argv[1]
+    logrus = sys.argv[2]
+    homedir = sys.argv[3]
+elif len(sys.argv) == 3:
+    keyfile = sys.argv[1]
+    logrus = sys.argv[2]
+    homedir = input("Enter the GPG configuration directory path (optional): ")
+elif len(sys.argv) == 2:
+    keyfile = sys.argv[1]
+    logrus = input("Enter the UID matching the secret key(s) to export: ")
+    homedir = input("Enter the GPG configuration directory path (optional): ")
+else:
+    keyfile = input("Enter the filename to save the secret key to: ")
+    logrus = input("Enter the UID matching the secret key(s) to export: ")
+    homedir = input("Enter the GPG configuration directory path (optional): ")
+
+if homedir.startswith("~"):
+    if os.path.exists(os.path.expanduser(homedir)) is True:
+	c.home_dir = os.path.expanduser(homedir)
+    else:
+	pass
+elif os.path.exists(homedir) is True:
+    c.home_dir = homedir
+else:
+    pass
+
+if c.home_dir is not None:
+    if c.home_dir.endswith("/"):
+	gpgfile = "{0}{1}.gpg".format(c.home_dir, keyfile)
+	ascfile = "{0}{1}.asc".format(c.home_dir, keyfile)
+    else:
+	gpgfile = "{0}/{1}.gpg".format(c.home_dir, keyfile)
+	ascfile = "{0}/{1}.asc".format(c.home_dir, keyfile)
+else:
+    if os.path.exists(os.environ["GNUPGHOME"]) is True:
+	hd = os.environ["GNUPGHOME"]
+    else:
+	hd = subprocess.getoutput(gpgconfcmd)
+    gpgfile = "{0}/{1}.gpg".format(hd, keyfile)
+    ascfile = "{0}/{1}.asc".format(hd, keyfile)
+
+try:
+    a_result = a.key_export_secret(pattern=logrus)
+    b_result = b.key_export_secret(pattern=logrus)
+except:
+    a_result = a.key_export_secret(pattern=None)
+    b_result = b.key_export_secret(pattern=None)
+
+if a_result is not None:
+    with open(ascfile, "wb") as f:
+	f.write(a_result)
+    os.chmod(ascfile, 0o600)
+else:
+    pass
+
+if b_result is not None:
+    with open(gpgfile, "wb") as f:
+	f.write(b_result)
+    os.chmod(gpgfile, 0o600)
+else:
+    pass
 #+end_src
 
 
@@ -850,24 +850,23 @@ trust model settings for recipient keys (defaults to =False=);
 =expect_sign=, prepare for signing (defaults to =False=); =compress=,
 compresses the plaintext prior to encryption (defaults to =True=).
 
-#+begin_src python
-  import gpg
+#+begin_src python -i
+import gpg
 
-  a_key = "0x12345678DEADBEEF"
-  text = b"""Some text to test with.
+a_key = "0x12345678DEADBEEF"
+text = b"""Some text to test with.
 
-  Since the text in this case must be bytes, it is most likely that
-  the input form will be a separate file which is opened with "rb"
-  as this is the simplest method of obtaining the correct data
-  format.
-  """
+Since the text in this case must be bytes, it is most likely that
+the input form will be a separate file which is opened with "rb"
+as this is the simplest method of obtaining the correct data format.
+"""
 
-  c = gpg.Context(armor=True)
-  rkey = list(c.keylist(pattern=a_key, secret=False))
-  ciphertext, result, sign_result = c.encrypt(text, recipients=rkey, sign=False)
+c = gpg.Context(armor=True)
+rkey = list(c.keylist(pattern=a_key, secret=False))
+ciphertext, result, sign_result = c.encrypt(text, recipients=rkey, sign=False)
 
-  with open("secret_plans.txt.asc", "wb") as afile:
-      afile.write(ciphertext)
+with open("secret_plans.txt.asc", "wb") as afile:
+    afile.write(ciphertext)
 #+end_src
 
 Though this is even more likely to be used like this; with the
@@ -875,22 +874,22 @@ plaintext input read from a file, the recipient keys used for
 encryption regardless of key trust status and the encrypted output
 also encrypted to any preconfigured keys set in the =gpg.conf= file:
 
-#+begin_src python
-  import gpg
+#+begin_src python -i
+import gpg
 
-  a_key = "0x12345678DEADBEEF"
+a_key = "0x12345678DEADBEEF"
 
-  with open("secret_plans.txt", "rb") as afile:
-      text = afile.read()
+with open("secret_plans.txt", "rb") as afile:
+    text = afile.read()
 
-  c = gpg.Context(armor=True)
-  rkey = list(c.keylist(pattern=a_key, secret=False))
-  ciphertext, result, sign_result = c.encrypt(text, recipients=rkey, sign=True,
-					      always_trust=True,
-					      add_encrypt_to=True)
+c = gpg.Context(armor=True)
+rkey = list(c.keylist(pattern=a_key, secret=False))
+ciphertext, result, sign_result = c.encrypt(text, recipients=rkey, sign=True,
+					    always_trust=True,
+					    add_encrypt_to=True)
 
-  with open("secret_plans.txt.asc", "wb") as afile:
-      afile.write(ciphertext)
+with open("secret_plans.txt.asc", "wb") as afile:
+    afile.write(ciphertext)
 #+end_src
 
 If the =recipients= paramater is empty then the plaintext is encrypted
@@ -912,45 +911,45 @@ email address on the =gnupg.org= domain,[fn:3] but does /not/ encrypt
 to a default key or other key which is configured to normally encrypt
 to.
 
-#+begin_src python
-  import gpg
+#+begin_src python -i
+import gpg
 
-  text = b"""Oh look, another test message.
+text = b"""Oh look, another test message.
 
-  The same rules apply as with the previous example and more likely
-  than not, the message will actually be drawn from reading the
-  contents of a file or, maybe, from entering data at an input()
-  prompt.
+The same rules apply as with the previous example and more likely
+than not, the message will actually be drawn from reading the
+contents of a file or, maybe, from entering data at an input()
+prompt.
 
-  Since the text in this case must be bytes, it is most likely that
-  the input form will be a separate file which is opened with "rb"
-  as this is the simplest method of obtaining the correct data
-  format.
-  """
+Since the text in this case must be bytes, it is most likely that
+the input form will be a separate file which is opened with "rb"
+as this is the simplest method of obtaining the correct data
+format.
+"""
 
-  c = gpg.Context(armor=True)
-  rpattern = list(c.keylist(pattern="@gnupg.org", secret=False))
-  logrus = []
+c = gpg.Context(armor=True)
+rpattern = list(c.keylist(pattern="@gnupg.org", secret=False))
+logrus = []
 
-  for i in range(len(rpattern)):
-      if rpattern[i].can_encrypt == 1:
-	  logrus.append(rpattern[i])
+for i in range(len(rpattern)):
+    if rpattern[i].can_encrypt == 1:
+	logrus.append(rpattern[i])
 
-  ciphertext, result, sign_result = c.encrypt(text, recipients=logrus,
-					      sign=False, always_trust=True)
+ciphertext, result, sign_result = c.encrypt(text, recipients=logrus,
+					    sign=False, always_trust=True)
 
-  with open("secret_plans.txt.asc", "wb") as afile:
-      afile.write(ciphertext)
+with open("secret_plans.txt.asc", "wb") as afile:
+    afile.write(ciphertext)
 #+end_src
 
 All it would take to change the above example to sign the message
 and also encrypt the message to any configured default keys would
 be to change the =c.encrypt= line to this:
 
-#+begin_src python
-  ciphertext, result, sign_result = c.encrypt(text, recipients=logrus,
-					      always_trust=True,
-					      add_encrypt_to=True)
+#+begin_src python -i
+ciphertext, result, sign_result = c.encrypt(text, recipients=logrus,
+					    always_trust=True,
+					    add_encrypt_to=True)
 #+end_src
 
 The only keyword arguments requiring modification are those for which
@@ -963,38 +962,38 @@ are not trusted (e.g. not signed or locally signed) then the
 encryption will raise an error.  It is possible to mitigate this
 somewhat with something more like this:
 
-#+begin_src python
-  import gpg
-
-  with open("secret_plans.txt.asc", "rb") as afile:
-      text = afile.read()
-
-  c = gpg.Context(armor=True)
-  rpattern = list(c.keylist(pattern="@gnupg.org", secret=False))
-  logrus = []
-
-  for i in range(len(rpattern)):
-      if rpattern[i].can_encrypt == 1:
-	  logrus.append(rpattern[i])
-
-      try:
-	  ciphertext, result, sign_result = c.encrypt(text, recipients=logrus,
-						      add_encrypt_to=True)
-      except gpg.errors.InvalidRecipients as e:
-	  for i in range(len(e.recipients)):
-	      for n in range(len(logrus)):
-		  if logrus[n].fpr == e.recipients[i].fpr:
-		      logrus.remove(logrus[n])
-		  else:
-		      pass
-	  try:
-	      ciphertext, result, sign_result = c.encrypt(text,
-							  recipients=logrus,
-							  add_encrypt_to=True)
-	      with open("secret_plans.txt.asc", "wb") as afile:
-		  afile.write(ciphertext)
-	  except:
-	      pass
+#+begin_src python -i
+import gpg
+
+with open("secret_plans.txt.asc", "rb") as afile:
+    text = afile.read()
+
+c = gpg.Context(armor=True)
+rpattern = list(c.keylist(pattern="@gnupg.org", secret=False))
+logrus = []
+
+for i in range(len(rpattern)):
+    if rpattern[i].can_encrypt == 1:
+	logrus.append(rpattern[i])
+
+    try:
+	ciphertext, result, sign_result = c.encrypt(text, recipients=logrus,
+						    add_encrypt_to=True)
+    except gpg.errors.InvalidRecipients as e:
+	for i in range(len(e.recipients)):
+	    for n in range(len(logrus)):
+		if logrus[n].fpr == e.recipients[i].fpr:
+		    logrus.remove(logrus[n])
+		else:
+		    pass
+	try:
+	    ciphertext, result, sign_result = c.encrypt(text,
+							recipients=logrus,
+							add_encrypt_to=True)
+	    with open("secret_plans.txt.asc", "wb") as afile:
+		afile.write(ciphertext)
+	except:
+	    pass
 #+end_src
 
 This will attempt to encrypt to all the keys searched for, then remove
@@ -1015,24 +1014,24 @@ to modify the Context prior to conducting the decryption and since the
 Context is only used once, setting it to =c= simply adds lines for no
 gain.
 
-#+begin_src python
-  import gpg
+#+begin_src python -i
+import gpg
 
-  ciphertext = input("Enter path and filename of encrypted file: ")
-  newfile = input("Enter path and filename of file to save decrypted data to: ")
+ciphertext = input("Enter path and filename of encrypted file: ")
+newfile = input("Enter path and filename of file to save decrypted data to: ")
 
-  with open(ciphertext, "rb") as cfile:
-      try:
-	  plaintext, result, verify_result = gpg.Context().decrypt(cfile)
-      except gpg.errors.GPGMEError as e:
-	  plaintext = None
-	  print(e)
+with open(ciphertext, "rb") as cfile:
+    try:
+	plaintext, result, verify_result = gpg.Context().decrypt(cfile)
+    except gpg.errors.GPGMEError as e:
+	plaintext = None
+	print(e)
 
-  if plaintext is not None:
-      with open(newfile, "wb") as nfile:
-	  nfile.write(plaintext)
-  else:
-      pass
+    if plaintext is not None:
+	with open(newfile, "wb") as nfile:
+	    nfile.write(plaintext)
+    else:
+	pass
 #+end_src
 
 The data available in =plaintext= in this example is the decrypted
@@ -1060,12 +1059,12 @@ default key specified and there is more than one secret key available
 it may be necessary to specify the key or keys with which to sign
 messages and files.
 
-#+begin_src python
-  import gpg
+#+begin_src python -i
+import gpg
 
-  logrus = input("Enter the email address or string to match signing keys to: ")
-  hancock = gpg.Context().keylist(pattern=logrus, secret=True)
-  sig_src = list(hancock)
+logrus = input("Enter the email address or string to match signing keys to: ")
+hancock = gpg.Context().keylist(pattern=logrus, secret=True)
+sig_src = list(hancock)
 #+end_src
 
 The signing examples in the following sections include the explicitly
@@ -1101,19 +1100,19 @@ multiple keys are involved; from the preferences saved into the key
 itself or by comparison with the preferences with all other keys
 involved.
 
-#+begin_src python
-  import gpg
+#+begin_src python -i
+import gpg
 
-  text0 = """Declaration of ... something.
+text0 = """Declaration of ... something.
 
-  """
-  text = text0.encode()
+"""
+text = text0.encode()
 
-  c = gpg.Context(armor=True, signers=sig_src)
-  signed_data, result = c.sign(text, mode=gpg.constants.sig.mode.NORMAL)
+c = gpg.Context(armor=True, signers=sig_src)
+signed_data, result = c.sign(text, mode=gpg.constants.sig.mode.NORMAL)
 
-  with open("/path/to/statement.txt.asc", "w") as afile:
-      afile.write(signed_data.decode())
+with open("/path/to/statement.txt.asc", "w") as afile:
+    afile.write(signed_data.decode())
 #+end_src
 
 Though everything in this example is accurate, it is more likely that
@@ -1121,17 +1120,17 @@ reading the input data from another file and writing the result to a
 new file will be performed more like the way it is done in the next
 example.  Even if the output format is ASCII armoured.
 
-#+begin_src python
-  import gpg
+#+begin_src python -i
+import gpg
 
-  with open("/path/to/statement.txt", "rb") as tfile:
-      text = tfile.read()
+with open("/path/to/statement.txt", "rb") as tfile:
+    text = tfile.read()
 
-  c = gpg.Context()
-  signed_data, result = c.sign(text, mode=gpg.constants.sig.mode.NORMAL)
+c = gpg.Context()
+signed_data, result = c.sign(text, mode=gpg.constants.sig.mode.NORMAL)
 
-  with open("/path/to/statement.txt.sig", "wb") as afile:
-      afile.write(signed_data)
+with open("/path/to/statement.txt.sig", "wb") as afile:
+    afile.write(signed_data)
 #+end_src
 
 
@@ -1144,35 +1143,35 @@ Detached signatures will often be needed in programmatic uses of
 GPGME, either for signing files (e.g. tarballs of code releases) or as
 a component of message signing (e.g. PGP/MIME encoded email).
 
-#+begin_src python
-  import gpg
+#+begin_src python -i
+import gpg
 
-  text0 = """Declaration of ... something.
+text0 = """Declaration of ... something.
 
-  """
-  text = text0.encode()
+"""
+text = text0.encode()
 
-  c = gpg.Context(armor=True)
-  signed_data, result = c.sign(text, mode=gpg.constants.sig.mode.DETACH)
+c = gpg.Context(armor=True)
+signed_data, result = c.sign(text, mode=gpg.constants.sig.mode.DETACH)
 
-  with open("/path/to/statement.txt.asc", "w") as afile:
-      afile.write(signed_data.decode())
+with open("/path/to/statement.txt.asc", "w") as afile:
+    afile.write(signed_data.decode())
 #+end_src
 
 As with normal signatures, detached signatures are best handled as
 byte literals, even when the output is ASCII armoured.
 
-#+begin_src python
-  import gpg
+#+begin_src python -i
+import gpg
 
-  with open("/path/to/statement.txt", "rb") as tfile:
-      text = tfile.read()
+with open("/path/to/statement.txt", "rb") as tfile:
+    text = tfile.read()
 
-  c = gpg.Context(signers=sig_src)
-  signed_data, result = c.sign(text, mode=gpg.constants.sig.mode.DETACH)
+c = gpg.Context(signers=sig_src)
+signed_data, result = c.sign(text, mode=gpg.constants.sig.mode.DETACH)
 
-  with open("/path/to/statement.txt.sig", "wb") as afile:
-      afile.write(signed_data)
+with open("/path/to/statement.txt.sig", "wb") as afile:
+    afile.write(signed_data)
 #+end_src
 
 
@@ -1185,35 +1184,35 @@ Though PGP/in-line messages are no longer encouraged in favour of
 PGP/MIME, there is still sometimes value in utilising in-line
 signatures.  This is where clear-signed messages or text is of value.
 
-#+begin_src python
-  import gpg
+#+begin_src python -i
+import gpg
 
-  text0 = """Declaration of ... something.
+text0 = """Declaration of ... something.
 
-  """
-  text = text0.encode()
+"""
+text = text0.encode()
 
-  c = gpg.Context()
-  signed_data, result = c.sign(text, mode=gpg.constants.sig.mode.CLEAR)
+c = gpg.Context()
+signed_data, result = c.sign(text, mode=gpg.constants.sig.mode.CLEAR)
 
-  with open("/path/to/statement.txt.asc", "w") as afile:
-      afile.write(signed_data.decode())
+with open("/path/to/statement.txt.asc", "w") as afile:
+    afile.write(signed_data.decode())
 #+end_src
 
 In spite of the appearance of a clear-signed message, the data handled
 by GPGME in signing it must still be byte literals.
 
-#+begin_src python
-  import gpg
+#+begin_src python -i
+import gpg
 
-  with open("/path/to/statement.txt", "rb") as tfile:
-      text = tfile.read()
+with open("/path/to/statement.txt", "rb") as tfile:
+    text = tfile.read()
 
-  c = gpg.Context()
-  signed_data, result = c.sign(text, mode=gpg.constants.sig.mode.CLEAR)
+c = gpg.Context()
+signed_data, result = c.sign(text, mode=gpg.constants.sig.mode.CLEAR)
 
-  with open("/path/to/statement.txt.asc", "wb") as afile:
-      afile.write(signed_data)
+with open("/path/to/statement.txt.asc", "wb") as afile:
+    afile.write(signed_data)
 #+end_src
 
 
@@ -1230,79 +1229,79 @@ with files and data with detached signatures.
 The following example is intended for use with the default signing
 method where the file was not ASCII armoured:
 
-#+begin_src python
-  import gpg
-  import time
-
-  filename = "statement.txt"
-  gpg_file = "statement.txt.gpg"
-
-  c = gpg.Context()
-
-  try:
-      data, result = c.verify(open(gpg_file))
-      verified = True
-  except gpg.errors.BadSignatures as e:
-      verified = False
-      print(e)
-
-  if verified is True:
-      for i in range(len(result.signatures)):
-	  sign = result.signatures[i]
-      print("""Good signature from:
-  {0}
-  with key {1}
-  made at {2}
-  """.format(c.get_key(sign.fpr).uids[0].uid, sign.fpr,
-	     time.ctime(sign.timestamp)))
-  else:
-      pass
+#+begin_src python -i
+import gpg
+import time
+
+filename = "statement.txt"
+gpg_file = "statement.txt.gpg"
+
+c = gpg.Context()
+
+try:
+    data, result = c.verify(open(gpg_file))
+    verified = True
+except gpg.errors.BadSignatures as e:
+    verified = False
+    print(e)
+
+if verified is True:
+    for i in range(len(result.signatures)):
+	sign = result.signatures[i]
+	print("""Good signature from:
+{0}
+with key {1}
+made at {2}
+""".format(c.get_key(sign.fpr).uids[0].uid, sign.fpr,
+	   time.ctime(sign.timestamp)))
+else:
+    pass
 #+end_src
 
 Whereas this next example, which is almost identical would work with
 normal ASCII armoured files and with clear-signed files:
 
-#+begin_src python
-  import gpg
-  import time
-
-  filename = "statement.txt"
-  asc_file = "statement.txt.asc"
-
-  c = gpg.Context()
-
-  try:
-      data, result = c.verify(open(asc_file))
-      verified = True
-  except gpg.errors.BadSignatures as e:
-      verified = False
-      print(e)
-
-  if verified is True:
-      for i in range(len(result.signatures)):
-	  sign = result.signatures[i]
-      print("""Good signature from:
-  {0}
-  with key {1}
-  made at {2}
-  """.format(c.get_key(sign.fpr).uids[0].uid, sign.fpr,
-	     time.ctime(sign.timestamp)))
-  else:
-      pass
+#+begin_src python -i
+import gpg
+import time
+
+filename = "statement.txt"
+asc_file = "statement.txt.asc"
+
+c = gpg.Context()
+
+try:
+    data, result = c.verify(open(asc_file))
+    verified = True
+except gpg.errors.BadSignatures as e:
+    verified = False
+    print(e)
+
+if verified is True:
+    for i in range(len(result.signatures)):
+	sign = result.signatures[i]
+	print("""Good signature from:
+{0}
+with key {1}
+made at {2}
+""".format(c.get_key(sign.fpr).uids[0].uid, sign.fpr,
+	   time.ctime(sign.timestamp)))
+else:
+    pass
 #+end_src
 
 In both of the previous examples it is also possible to compare the
 original data that was signed against the signed data in =data= to see
 if it matches with something like this:
 
-#+begin_src python
-  with open(filename, "rb") as afile:
-      text = afile.read()
+#+begin_src python -i
+with open(filename, "rb") as afile:
+    text = afile.read()
 
-  if text == data:
-      print("Good signature.")
-  else:
-      pass
+if text == data:
+    print("Good signature.")
+else:
+    pass
 #+end_src
 
 The following two examples, however, deal with detached signatures.
@@ -1311,62 +1310,62 @@ returned since it is already being explicitly referenced in the first
 argument of =c.verify=.  So =data= is =None= and only the information
 in =result= is available.
 
-#+begin_src python
-  import gpg
-  import time
-
-  filename = "statement.txt"
-  sig_file = "statement.txt.sig"
-
-  c = gpg.Context()
-
-  try:
-      data, result = c.verify(open(filename), open(sig_file))
-      verified = True
-  except gpg.errors.BadSignatures as e:
-      verified = False
-      print(e)
-
-  if verified is True:
-      for i in range(len(result.signatures)):
-	  sign = result.signatures[i]
-      print("""Good signature from:
-  {0}
-  with key {1}
-  made at {2}
-  """.format(c.get_key(sign.fpr).uids[0].uid, sign.fpr,
-	     time.ctime(sign.timestamp)))
-  else:
-      pass
+#+begin_src python -i
+import gpg
+import time
+
+filename = "statement.txt"
+sig_file = "statement.txt.sig"
+
+c = gpg.Context()
+
+try:
+    data, result = c.verify(open(filename), open(sig_file))
+    verified = True
+except gpg.errors.BadSignatures as e:
+    verified = False
+    print(e)
+
+if verified is True:
+    for i in range(len(result.signatures)):
+	sign = result.signatures[i]
+	print("""Good signature from:
+{0}
+with key {1}
+made at {2}
+""".format(c.get_key(sign.fpr).uids[0].uid, sign.fpr,
+	   time.ctime(sign.timestamp)))
+else:
+    pass
 #+end_src
 
-#+begin_src python
-  import gpg
-  import time
-
-  filename = "statement.txt"
-  asc_file = "statement.txt.asc"
-
-  c = gpg.Context()
-
-  try:
-      data, result = c.verify(open(filename), open(asc_file))
-      verified = True
-  except gpg.errors.BadSignatures as e:
-      verified = False
-      print(e)
-
-  if verified is True:
-      for i in range(len(result.signatures)):
-	  sign = result.signatures[i]
-      print("""Good signature from:
-  {0}
-  with key {1}
-  made at {2}
-  """.format(c.get_key(sign.fpr).uids[0].uid, sign.fpr,
-	     time.ctime(sign.timestamp)))
-  else:
-      pass
+#+begin_src python -i
+import gpg
+import time
+
+filename = "statement.txt"
+asc_file = "statement.txt.asc"
+
+c = gpg.Context()
+
+try:
+    data, result = c.verify(open(filename), open(asc_file))
+    verified = True
+except gpg.errors.BadSignatures as e:
+    verified = False
+    print(e)
+
+if verified is True:
+    for i in range(len(result.signatures)):
+	sign = result.signatures[i]
+	print("""Good signature from:
+{0}
+with key {1}
+made at {2}
+""".format(c.get_key(sign.fpr).uids[0].uid, sign.fpr,
+	   time.ctime(sign.timestamp)))
+else:
+    pass
 #+end_src
 
 
@@ -1424,16 +1423,16 @@ be the passphrase and if =passphrase= is set to =True= then gpg-agent
 will launch pinentry to prompt for a passphrase.  For the sake of
 convenience, these examples will keep =passphrase= set to =None=.
 
-#+begin_src python
-  import gpg
+#+begin_src python -i
+import gpg
 
-  c = gpg.Context()
+c = gpg.Context()
 
-  c.home_dir = "~/.gnupg-dm"
-  userid = "Danger Mouse <[email protected]>"
+c.home_dir = "~/.gnupg-dm"
+userid = "Danger Mouse <[email protected]>"
 
-  dmkey = c.create_key(userid, algorithm="rsa3072", expires_in=31536000,
-		       sign=True, certify=True)
+dmkey = c.create_key(userid, algorithm="rsa3072", expires_in=31536000,
+		     sign=True, certify=True)
 #+end_src
 
 One thing to note here is the use of setting the =c.home_dir=
@@ -1452,8 +1451,8 @@ already set and the correct directory and file permissions.
 The successful generation of the key can be confirmed via the returned
 =GenkeyResult= object, which includes the following data:
 
-#+begin_src python
-   print("""
+#+begin_src python -i
+print("""
    Fingerprint:  {0}
    Primary Key:  {1}
     Public Key:  {2}
@@ -1519,21 +1518,21 @@ primary key.  Since Danger Mouse is a security conscious secret agent,
 this subkey will only be valid for about six months, half the length
 of the primary key.
 
-#+begin_src python
-  import gpg
+#+begin_src python -i
+import gpg
 
-  c = gpg.Context()
-  c.home_dir = "~/.gnupg-dm"
+c = gpg.Context()
+c.home_dir = "~/.gnupg-dm"
 
-  key = c.get_key(dmkey.fpr, secret=True)
-  dmsub = c.create_subkey(key, algorithm="rsa3072", expires_in=15768000,
-			  encrypt=True)
+key = c.get_key(dmkey.fpr, secret=True)
+dmsub = c.create_subkey(key, algorithm="rsa3072", expires_in=15768000,
+			encrypt=True)
 #+end_src
 
 As with the primary key, the results here can be checked with:
 
-#+begin_src python
-   print("""
+#+begin_src python -i
+print("""
    Fingerprint:  {0}
    Primary Key:  {1}
     Public Key:  {2}
@@ -1575,17 +1574,17 @@ ID to an existing key is much simpler.  The method used to do this is
 =key_add_uid= and the only arguments it takes are for the =key= and
 the new =uid=.
 
-#+begin_src python
-  import gpg
+#+begin_src python -i
+import gpg
 
-  c = gpg.Context()
-  c.home_dir = "~/.gnupg-dm"
+c = gpg.Context()
+c.home_dir = "~/.gnupg-dm"
 
-  dmfpr = "177B7C25DB99745EE2EE13ED026D2F19E99E63AA"
-  key = c.get_key(dmfpr, secret=True)
-  uid = "Danger Mouse <[email protected]>"
+dmfpr = "177B7C25DB99745EE2EE13ED026D2F19E99E63AA"
+key = c.get_key(dmfpr, secret=True)
+uid = "Danger Mouse <[email protected]>"
 
-  c.key_add_uid(key, uid)
+c.key_add_uid(key, uid)
 #+end_src
 
 Unsurprisingly the result of this is:
@@ -1612,17 +1611,17 @@ Unsurprisingly the result of this is:
 Revoking a user ID is a fairly similar process, except that it uses
 the =key_revoke_uid= method.
 
-#+begin_src python
-  import gpg
+#+begin_src python -i
+import gpg
 
-  c = gpg.Context()
-  c.home_dir = "~/.gnupg-dm"
+c = gpg.Context()
+c.home_dir = "~/.gnupg-dm"
 
-  dmfpr = "177B7C25DB99745EE2EE13ED026D2F19E99E63AA"
-  key = c.get_key(dmfpr, secret=True)
-  uid = "Danger Mouse <[email protected]>"
+dmfpr = "177B7C25DB99745EE2EE13ED026D2F19E99E63AA"
+key = c.get_key(dmfpr, secret=True)
+uid = "Danger Mouse <[email protected]>"
 
-  c.key_revoke_uid(key, uid)
+c.key_revoke_uid(key, uid)
 #+end_src
 
 
@@ -1652,15 +1651,15 @@ it is case sensitive.
 To sign Danger Mouse's key for just the initial user ID with a
 signature which will last a little over a month, do this:
 
-#+begin_src python
-  import gpg
+#+begin_src python -i
+import gpg
 
-  c = gpg.Context()
-  uid = "Danger Mouse <[email protected]>"
+c = gpg.Context()
+uid = "Danger Mouse <[email protected]>"
 
-  dmfpr = "177B7C25DB99745EE2EE13ED026D2F19E99E63AA"
-  key = c.get_key(dmfpr, secret=True)
-  c.key_sign(key, uids=uid, expires_in=2764800)
+dmfpr = "177B7C25DB99745EE2EE13ED026D2F19E99E63AA"
+key = c.get_key(dmfpr, secret=True)
+c.key_sign(key, uids=uid, expires_in=2764800)
 #+end_src
 
 
@@ -1683,28 +1682,28 @@ MUAs readily.
 The following code, however, provides a work-around for obtaining this
 information in Python.
 
-#+begin_src python
-  import subprocess
+#+begin_src python -i
+import subprocess
 
-  lines = subprocess.getoutput("gpgconf --list-options gpg").splitlines()
+lines = subprocess.getoutput("gpgconf --list-options gpg").splitlines()
 
-  for i in range(len(lines)):
-      if lines[i].startswith("group") is True:
-	  line = lines[i]
-      else:
-	  pass
+for i in range(len(lines)):
+    if lines[i].startswith("group") is True:
+	line = lines[i]
+    else:
+	pass
 
-  groups = line.split(":")[-1].replace('"', '').split(',')
+groups = line.split(":")[-1].replace('"', '').split(',')
 
-  group_lines = []
-  group_lists = []
+group_lines = []
+group_lists = []
 
-  for i in range(len(groups)):
-      group_lines.append(groups[i].split("="))
-      group_lists.append(groups[i].split("="))
+for i in range(len(groups)):
+    group_lines.append(groups[i].split("="))
+    group_lists.append(groups[i].split("="))
 
-  for i in range(len(group_lists)):
-      group_lists[i][1] = group_lists[i][1].split()
+for i in range(len(group_lists)):
+    group_lists[i][1] = group_lists[i][1].split()
 #+end_src
 
 The result of that code is that =group_lines= is a list of lists where