python bindings: gpg.core

* Changed id/else statements to a more pythonic form from scheme
  masquerading as python - sorry Justus, it had to go ;).
* With the added bonus of enabling PEP8 compliance in those sections.
* Fixed remaining PEP8 compliance issues with the exception of the
  imports at the beginning of the file (changing those will break the
  entire module, so we'll cope with it as it is).

lang/python/src/core.py

@@ -762,6 +762,41 @@ class Context(GpgmeWrapper):
         GPGMEError   -- as signaled by the underlying library
 
         """
+        if sign is True:
+            _sign = constants.create.SIGN
+        else:
+            _sign = 0
+
+        if encrypt is True:
+            _encrypt = constants.create.ENCR
+        else:
+            _encrypt = 0
+
+        if certify is True:
+            _certify = constants.create.CERT
+        else:
+            _certify = 0
+
+        if authenticate is True:
+            _authenticate = constants.create.AUTH
+        else:
+            _authenticate = 0
+
+        if passphrase is None:
+            _nopasswd = constants.create.NOPASSWD
+        else:
+            _nopasswd = 0
+
+        if expires is True:
+            _expires = 0
+        else:
+            _expires = constants.create.NOEXPIRE
+
+        if force is True:
+            _force = constants.create.FORCE
+        else:
+            _force = 0
+
         if util.is_a_string(passphrase):
             old_pinentry_mode = self.pinentry_mode
             old_passphrase_cb = getattr(self, '_passphrase_cb', None)
@@ -772,17 +807,10 @@ class Context(GpgmeWrapper):
             self.set_passphrase_cb(passphrase_cb)
 
         try:
-            self.op_createkey(userid, algorithm,
+            self.op_createkey(userid, algorithm, 0,  # reserved
-                              0,  # reserved
+                              expires_in, None,  # extrakey
-                              expires_in,
+                              _sign, _encrypt, _certify, _authenticate,
-                              None,  # extrakey
+                              _nopasswd, _expires, _force)
-                              ((constants.create.SIGN if sign else 0)
-                               | (constants.create.ENCR if encrypt else 0)
-                               | (constants.create.CERT if certify else 0)
-                               | (constants.create.AUTH if authenticate else 0)
-                               | (constants.create.NOPASSWD if passphrase is None else 0)
-                               | (0 if expires else constants.create.NOEXPIRE)
-                               | (constants.create.FORCE if force else 0)))
         finally:
             if util.is_a_string(passphrase):
                 self.pinentry_mode = old_pinentry_mode
@@ -839,6 +867,36 @@ class Context(GpgmeWrapper):
         GPGMEError   -- as signaled by the underlying library
 
         """
+        if sign is True:
+            _sign = constants.create.SIGN
+        else:
+            _sign = 0
+
+        if encrypt is True:
+            _encrypt = constants.create.ENCR
+        else:
+            _encrypt = 0
+
+        if authenticate is True:
+            _authenticate = constants.create.AUTH
+        else:
+            _authenticate = 0
+
+        if passphrase is None:
+            _nopasswd = constants.create.NOPASSWD
+        else:
+            _nopasswd = 0
+
+        if expires is True:
+            _expires = 0
+        else:
+            _expires = constants.create.NOEXPIRE
+
+        if force is True:
+            _force = constants.create.FORCE
+        else:
+            _force = 0
+
         if util.is_a_string(passphrase):
             old_pinentry_mode = self.pinentry_mode
             old_passphrase_cb = getattr(self, '_passphrase_cb', None)
@@ -849,15 +907,9 @@ class Context(GpgmeWrapper):
             self.set_passphrase_cb(passphrase_cb)
 
         try:
-            self.op_createsubkey(key, algorithm,
+            self.op_createsubkey(key, algorithm, 0,  # reserved
-                                 0,  # reserved
+                                 expires_in, _sign, _encrypt, _authenticate,
-                                 expires_in,
+                                 _nopasswd, _expires, _force)
-                                 ((constants.create.SIGN if sign else 0)
-                                  | (constants.create.ENCR if encrypt else 0)
-                                  | (constants.create.AUTH if authenticate else 0)
-                                  | (constants.create.NOPASSWD
-                                     if passphrase is None else 0)
-                                  | (0 if expires else constants.create.NOEXPIRE)))
         finally:
             if util.is_a_string(passphrase):
                 self.pinentry_mode = old_pinentry_mode
@@ -1079,13 +1131,13 @@ class Context(GpgmeWrapper):
         # $ grep '^gpgme_error_t ' obj/lang/python/python3.5-gpg/gpgme.h \
         # | grep -v _op_ | awk "/\(gpgme_ctx/ { printf (\"'%s',\\n\", \$2) } "
         return ((name.startswith('gpgme_op_') and not
-            name.endswith('_result')) or name in {'gpgme_new',
+                 name.endswith('_result')) or name in
-            'gpgme_set_ctx_flag', 'gpgme_set_protocol',
+                {'gpgme_new', 'gpgme_set_ctx_flag', 'gpgme_set_protocol',
-            'gpgme_set_sub_protocol', 'gpgme_set_keylist_mode',
+                    'gpgme_set_sub_protocol', 'gpgme_set_keylist_mode',
-            'gpgme_set_pinentry_mode', 'gpgme_set_locale',
+                    'gpgme_set_pinentry_mode', 'gpgme_set_locale',
-            'gpgme_ctx_set_engine_info', 'gpgme_signers_add',
+                    'gpgme_ctx_set_engine_info', 'gpgme_signers_add',
-            'gpgme_sig_notation_add', 'gpgme_set_sender', 'gpgme_cancel',
+                    'gpgme_sig_notation_add', 'gpgme_set_sender',
-            'gpgme_cancel_async', 'gpgme_get_key'})
+                    'gpgme_cancel', 'gpgme_cancel_async', 'gpgme_get_key'})
 
     _boolean_properties = {'armor', 'textmode', 'offline'}