Python bindings examples: PEP8 conpliance

* Appears to be complete compliance.

lang/python/examples/assuan.py

@@ -14,14 +14,14 @@
 #
 # You should have received a copy of the GNU General Public License
 # along with this program; if not, see <http://www.gnu.org/licenses/>.
-
 """Demonstrate the use of the Assuan protocol engine"""
 
 from __future__ import absolute_import, print_function, unicode_literals
-del absolute_import, print_function, unicode_literals
 
 import gpg
 
+del absolute_import, print_function, unicode_literals
+
 with gpg.Context(protocol=gpg.constants.protocol.ASSUAN) as c:
     # Invoke the pinentry to get a confirmation.
     err = c.assuan_transact(['GET_CONFIRMATION', 'Hello there'])

lang/python/examples/decryption-filter.py

@@ -1,6 +1,6 @@
 #!/usr/bin/env python
 #
-# Copyright (C) 2016 g10 Code GmbH
+# Copyright (C) 2016, 2018 g10 Code GmbH
 #
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -14,7 +14,6 @@
 #
 # You should have received a copy of the GNU General Public License
 # along with this program; if not, see <http://www.gnu.org/licenses/>.
-
 """A decryption filter
 
 This demonstrates decryption using gpg3 in three lines of code.  To
@@ -25,8 +24,10 @@ be used like this:
 """
 
 from __future__ import absolute_import, print_function, unicode_literals
-del absolute_import, print_function, unicode_literals
 
 import sys
 import gpg
+
+del absolute_import, print_function, unicode_literals
+
 gpg.Context().decrypt(sys.stdin, sink=sys.stdout)

lang/python/examples/delkey.py

@@ -20,10 +20,11 @@
 # It deletes keys for joe@example.org generated by genkey.py script
 
 from __future__ import absolute_import, print_function, unicode_literals
-del absolute_import, print_function, unicode_literals
 
 import gpg
 
+del absolute_import, print_function, unicode_literals
+
 with gpg.Context() as c:
     # Note: We must not modify the key store during iteration,
     # therefore, we explicitly make a list.

lang/python/examples/exportimport.py

@@ -20,12 +20,13 @@
 # It uses keys for joe+gpg@example.org generated by genkey.py script
 
 from __future__ import absolute_import, print_function, unicode_literals
-del absolute_import, print_function, unicode_literals
 
 import sys
 import os
 import gpg
 
+del absolute_import, print_function, unicode_literals
+
 user = "joe+gpg@example.org"
 
 with gpg.Context(armor=True) as c, gpg.Data() as expkey:

lang/python/examples/genkey.py

@@ -18,10 +18,11 @@
 # along with this program; if not, see <http://www.gnu.org/licenses/>.
 
 from __future__ import absolute_import, print_function, unicode_literals
-del absolute_import, print_function, unicode_literals
 
 import gpg
 
+del absolute_import, print_function, unicode_literals
+
 # This is the example from the GPGME manual.
 
 parms = """<GnupgKeyParms format="internal">

lang/python/examples/inter-edit.py

@@ -15,15 +15,15 @@
 #
 # You should have received a copy of the GNU General Public License
 # along with this program; if not, see <http://www.gnu.org/licenses/>.
-
 """Simple interactive editor to test editor scripts"""
 
 from __future__ import absolute_import, print_function, unicode_literals
-del absolute_import, print_function, unicode_literals
 
 import sys
 import gpg
 
+del absolute_import, print_function, unicode_literals
+
 if len(sys.argv) != 2:
     sys.exit("Usage: %s <Gpg key pattern>\n" % sys.argv[0])
 
@@ -40,10 +40,12 @@ with gpg.Context() as c:
     print("Editing key {} ({}):".format(key.uids[0].uid, key.subkeys[0].fpr))
 
     def edit_fnc(keyword, args):
-        print("Status: {}, args: {} > ".format(
+        print(
-            keyword, args), end='', flush=True)
+            "Status: {}, args: {} > ".format(keyword, args),
+            end='',
+            flush=True)
 
-        if not 'GET' in keyword:
+        if 'GET' not in keyword:
             # no prompt
             print()
             return None

lang/python/examples/low_level-encrypt_to_all.py

@@ -16,18 +16,18 @@
 #
 # You should have received a copy of the GNU General Public License
 # along with this program; if not, see <http://www.gnu.org/licenses/>.
-
 """
 This program will try to encrypt a simple message to each key on your
 keyring.  If your keyring has any invalid keys on it, those keys will
 be skipped and it will re-try the encryption."""
 
 from __future__ import absolute_import, print_function, unicode_literals
-del absolute_import, print_function, unicode_literals
 
 import sys
 import gpg
 
+del absolute_import, print_function, unicode_literals
+
 with gpg.Context(armor=True) as c:
     recipients = list()
     for key in c.keylist():
@@ -40,14 +40,15 @@ with gpg.Context(armor=True) as c:
     while not ciphertext:
         print("Encrypting to %d recipients" % len(recipients))
         try:
-            ciphertext, _, _ = c.encrypt(b'This is my message.',
+            ciphertext, _, _ = c.encrypt(
-                                         recipients=recipients)
+                b'This is my message.', recipients=recipients)
         except gpg.errors.InvalidRecipients as e:
             print("Encryption failed for these keys:\n{0!s}".format(e))
 
             # filter out the bad keys
             bad_keys = {bad.fpr for bad in e.recipients}
-            recipients = [r for r in recipients
+            recipients = [
-                          if not r.subkeys[0].fpr in bad_keys]
+                r for r in recipients if not r.subkeys[0].fpr in bad_keys
+            ]
 
     sys.stdout.buffer.write(ciphertext)

lang/python/examples/sign.py

@@ -17,12 +17,13 @@
 # along with this program; if not, see <http://www.gnu.org/licenses/>.
 
 from __future__ import absolute_import, print_function, unicode_literals
-del absolute_import, print_function, unicode_literals
 
 import sys
 import gpg
 from gpg.constants.sig import mode
 
+del absolute_import, print_function, unicode_literals
+
 with gpg.Context() as c:
     signed, _ = c.sign(b"Test message", mode=mode.CLEAR)
     sys.stdout.buffer.write(signed)

lang/python/examples/signverify.py

@@ -20,12 +20,13 @@
 # It uses keys for joe+gpg@example.org generated by genkey.py script
 
 from __future__ import absolute_import, print_function, unicode_literals
-del absolute_import, print_function, unicode_literals
 
 import sys
 import gpg
 from gpg.constants.sig import mode
 
+del absolute_import, print_function, unicode_literals
+
 user = "joe+gpg"
 
 with gpg.Context(pinentry_mode=gpg.constants.PINENTRY_MODE_LOOPBACK) as c:

lang/python/examples/simple.py

@@ -18,11 +18,12 @@
 # along with this program; if not, see <http://www.gnu.org/licenses/>.
 
 from __future__ import absolute_import, print_function, unicode_literals
-del absolute_import, print_function, unicode_literals
 
 import sys
 import gpg
 
+del absolute_import, print_function, unicode_literals
+
 with gpg.Context(armor=True) as c:
     recipients = []
     print("Enter name of your recipient(s), end with a blank line.")
@@ -40,8 +41,8 @@ with gpg.Context(armor=True) as c:
     if not recipients:
         sys.exit("No recipients.")
 
-    print("Encrypting for {}.".format(", ".join(k.uids[0].name
+    print("Encrypting for {}.".format(", ".join(
-                                                for k in recipients)))
+        k.uids[0].name for k in recipients)))
 
     ciphertext, _, _ = c.encrypt(b"This is my message,", recipients)
     sys.stdout.buffer.write(ciphertext)

lang/python/examples/testCMSgetkey.py

@@ -15,15 +15,15 @@
 #
 # You should have received a copy of the GNU General Public License
 # along with this program; if not, see <http://www.gnu.org/licenses/>.
-
 """A test applicaton for the CMS protocol."""
 
 from __future__ import absolute_import, print_function, unicode_literals
-del absolute_import, print_function, unicode_literals
 
 import sys
 import gpg
 
+del absolute_import, print_function, unicode_literals
+
 if len(sys.argv) != 2:
     sys.exit("fingerprint or unique key ID for gpgme_get_key()")
 

lang/python/examples/verifydetails.py

@@ -18,11 +18,13 @@
 # along with this program; if not, see <http://www.gnu.org/licenses/>.
 
 from __future__ import absolute_import, print_function, unicode_literals
-del absolute_import, print_function, unicode_literals
 
 import sys
 import gpg
 
+del absolute_import, print_function, unicode_literals
+
+
 def print_engine_infos():
     print("gpgme version:", gpg.core.check_version(None))
     print("engines:")
@@ -31,7 +33,8 @@ def print_engine_infos():
         print(engine.file_name, engine.version)
 
     for proto in [gpg.constants.protocol.OpenPGP, gpg.constants.protocol.CMS]:
-        print("Have {}? {}".format(gpg.core.get_protocol_name(proto),
+        print("Have {}? {}".format(
+            gpg.core.get_protocol_name(proto),
             gpg.core.engine_check_version(proto)))
 
 
@@ -40,9 +43,9 @@ def verifyprintdetails(filename, detached_sig_filename=None):
     with gpg.Context() as c:
 
         # Verify.
-        data, result = c.verify(open(filename),
+        data, result = c.verify(
-                                open(detached_sig_filename)
+            open(filename),
-                                if detached_sig_filename else None)
+            open(detached_sig_filename) if detached_sig_filename else None)
 
         # List results for all signatures. Status equal 0 means "Ok".
         for index, sign in enumerate(result.signatures):
@@ -57,14 +60,14 @@ def verifyprintdetails(filename, detached_sig_filename=None):
     if data:
         sys.stdout.buffer.write(data)
 
+
 def main():
     print_engine_infos()
     print()
 
     argc = len(sys.argv)
     if argc < 2 or argc > 3:
-        sys.exit(
+        sys.exit("Usage: {} <filename>[ <detached_signature_filename>]".format(
-            "Usage: {} <filename>[ <detached_signature_filename>]".format(
             sys.argv[0]))
 
     if argc == 2:
@@ -74,5 +77,6 @@ def main():
         print("trying to verify signature {1} for file {0}.".format(*sys.argv))
         verifyprintdetails(sys.argv[1], sys.argv[2])
 
+
 if __name__ == "__main__":
     main()