python: Add a nicer interface to list keys.

* lang/python/pyme/core.py (Context.keylist): New method.
* lang/python/tests/t-keylist.py: Test new method.

Signed-off-by: Justus Winter <justus@g10code.com>

lang/python/pyme/core.py

@@ -468,6 +468,21 @@ class Context(GpgmeWrapper):
             plainbytes = data.read()
         return plainbytes, result
 
+    def keylist(self, pattern=None, secret=False):
+        """List keys
+
+        Keyword arguments:
+        pattern	-- return keys matching pattern (default: all keys)
+        secret	-- return only secret keys
+
+        Returns:
+                -- an iterator returning key objects
+
+        Raises:
+        GPGMEError	-- as signaled by the underlying library
+        """
+        return self.op_keylist_all(pattern, secret)
+
     def assuan_transact(self, command,
                         data_cb=None, inquire_cb=None, status_cb=None):
         """Issue a raw assuan command

lang/python/tests/t-keylist.py

@@ -216,7 +216,7 @@ result = c.op_keylist_result()
 assert not result.truncated, "Key listing unexpectedly truncated"
 
 
-for i, key in enumerate(c.op_keylist_all(None, False)):
+for i, key in enumerate(c.keylist()):
     try:
         if len(keys[i]) == 4:
             fpr, sec_keyid, uids, n_subkeys = keys[i]