python: Clean up and modernize examples.

* lang/python/examples/Examples.rst: Delete file.
* lang/python/examples/t-edit.py: Likewise.  This is actually a test
case and has been moved to 'tests'.
* lang/python/examples/assuan.py: New file.
* lang/python/examples/decryption-filter.py: Likewise.
* lang/python/examples/delkey.py: Modernize.
* lang/python/examples/encrypt-to-all.py: Likewise.
* lang/python/examples/exportimport.py: Likewise.
* lang/python/examples/genkey.py: Likewise.
* lang/python/examples/inter-edit.py: Likewise.
* lang/python/examples/sign.py: Likewise.
* lang/python/examples/signverify.py: Likewise.
* lang/python/examples/simple.py: Likewise.
* lang/python/examples/testCMSgetkey.py: Likewise.
* lang/python/examples/verifydetails.py: Likewise.

Signed-off-by: Justus Winter <[email protected]>

1 files changed, 49 insertions, 66 deletions

diff --git a/lang/python/examples/exportimport.py b/lang/python/examples/exportimport.py
index d0e1fa89..39b1595c 100755
--- a/lang/python/examples/exportimport.py
+++ b/lang/python/examples/exportimport.py
@@ -1,75 +1,58 @@
 #!/usr/bin/env python3
+#
+# Copyright (C) 2016 g10 Code GmbH
 # Copyright (C) 2004,2008 Igor Belyi <[email protected]>
 #
-#    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 the Free Software Foundation; either version 2 of
-#    the License, or (at your option) any later version.
+# 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
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
 #
-#    This program is distributed in the hope that it will be useful,
-#    but WITHOUT ANY WARRANTY; without even the implied warranty of
-#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-#    GNU General Public License for more details.
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# General Public License for more details.
 #
-#    You should have received a copy of the GNU General Public License
-#    along with this program; if not, write to the Free Software
-#    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
-#    02111-1307 USA
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, see <http://www.gnu.org/licenses/>.
 
 # Sample of export and import of keys
-# It uses keys for [email protected] generated by genkey.pl script
+# It uses keys for [email protected] generated by genkey.py script
 
 import sys
-from pyme import core
-
-core.check_version(None)
-
-expkey = core.Data()
-c = core.Context()
-c.set_armor(1)
-user = b"[email protected]"
-
-print(" - Export %s's public keys - " % user)
-c.op_export(user, 0, expkey)
-
-# print out exported data to see how it looks in armor.
-expkey.seek(0, 0)
-expstring = expkey.read()
-if expstring:
-    print(expstring)
-else:
-    print("No %s's keys to export!" % user)
-    sys.exit(0)
-
-
-# delete keys to ensure that they came from our imported data.
-# Note that since joe's key has private part as well we can only delete
-# both of them. As a side effect joe won't have private key for this
-# exported public one. If it's Ok with you uncomment the next 4 lines.
-# print " - Delete %s's public keys - " % user
-# for thekey in [x for x in c.op_keylist_all(user, 0)]:
-#     if not thekey.secret:
-#         c.op_delete(thekey, 1)
-
-
-# initialize import data from a string as if it was read from a file.
-newkey = core.Data(expstring)
-
-print(" - Import exported keys - ")
-c.op_import(newkey)
-result = c.op_import_result()
-
-# show the import result
-if result:
-    print(" - Result of the import - ")
-    for k in dir(result):
-        if k not in result.__dict__ and not k.startswith("_"):
-            if k == "imports":
-                print(k, ":")
-                for impkey in result.__getattr__(k):
-                    print("    fpr=%s result=%d status=%x" %
-                          (impkey.fpr, impkey.result, impkey.status))
-            else:
-                print(k, ":", result.__getattr__(k))
-else:
-    print(" - No import result - ")
+import os
+import pyme
+
+user = "[email protected]"
+
+with pyme.Context(armor=True) as c, pyme.Data() as expkey:
+    print(" - Export %s's public keys - " % user)
+    c.op_export(user, 0, expkey)
+
+    # print out exported data to see how it looks in armor.
+    expkey.seek(0, os.SEEK_SET)
+    expstring = expkey.read()
+    if expstring:
+        sys.stdout.buffer.write(expstring)
+    else:
+        sys.exit("No %s's keys to export!" % user)
+
+# delete keys to ensure that they came from our imported data.  Note
+# that if joe's key has private part as well we can only delete both
+# of them.
+with pyme.Context() as c:
+    # Note: We must not modify the key store during iteration,
+    # therfore, we explicitly make a list.
+    keys = list(c.keylist(user))
+
+    for k in keys:
+        c.op_delete(k, True)
+
+with pyme.Context() as c:
+    print(" - Import exported keys - ")
+    c.op_import(expstring)
+    result = c.op_import_result()
+    if result:
+        print(result)
+    else:
+        sys.exit(" - No import result - ")