Fix formatting issues.

* Update maintainer fields to my name and email address.
* Fix most issues reported by pylint (some of them are false positives
  so I am ignoring them.

This change has no functional changes.

pydgraph/client.py

@@ -12,46 +12,58 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+"""Dgraph python client."""
+
 import random
 
 from pydgraph import txn, util
 from pydgraph.meta import VERSION
 from pydgraph.proto import api_pb2 as api
 
 __author__ = 'Mohit Ranka <mohitranka@gmail.com>'
-__maintainer__ = 'Garvit Pahal <garvit@dgraph.io>'
+__maintainer__ = 'Martin Martinez Rivera <martinmr@dgraph.io>'
 __version__ = VERSION
 __status__ = 'development'
 
 
 class DgraphClient(object):
     """Creates a new Client for interacting with the Dgraph store.
-    
+
     The client can be backed by multiple connections (to the same server, or
     multiple servers in a cluster).
     """
 
     def __init__(self, *clients):
-        if len(clients) == 0:
+        if not clients:
             raise ValueError('No clients provided in DgraphClient constructor')
 
         self._clients = clients[:]
         self._lin_read = api.LinRead()
 
-    def alter(self, op, timeout=None, metadata=None, credentials=None):
-        return self.any_client().alter(op, timeout=timeout, metadata=metadata, credentials=credentials)
-
-    def query(self, q, variables=None, timeout=None, metadata=None, credentials=None):
-        return self.txn().query(q, variables=variables, timeout=timeout, metadata=metadata, credentials=credentials)
+    def alter(self, operation, timeout=None, metadata=None, credentials=None):
+        """Runs a modification via this client."""
+        return self.any_client().alter(operation, timeout=timeout,
+                                       metadata=metadata,
+                                       credentials=credentials)
+
+    def query(self, query, variables=None, timeout=None, metadata=None,
+              credentials=None):
+        """Runs a query via this client."""
+        return self.txn().query(query, variables=variables, timeout=timeout,
+                                metadata=metadata, credentials=credentials)
 
     def txn(self):
+        """Creates a transaction."""
         return txn.Txn(self)
 
     def set_lin_read(self, ctx):
+        """Sets linread map in ctx to the one from this instace."""
         ctx.lin_read.MergeFrom(self._lin_read)
 
     def merge_lin_reads(self, src):
+        """Merges linread map in this instance with src."""
         util.merge_lin_reads(self._lin_read, src)
 
     def any_client(self):
+        """Returns a random client."""
         return random.choice(self._clients)

pydgraph/client_stub.py

@@ -12,41 +12,59 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+"""Stub for RPC request."""
+
 import grpc
 
 from pydgraph.meta import VERSION
 from pydgraph.proto import api_pb2_grpc as api_grpc
 
 __author__ = 'Garvit Pahal <garvit@dgraph.io>'
-__maintainer__ = 'Garvit Pahal <garvit@dgraph.io>'
+__maintainer__ = 'Martin Martinez Rivera <martinmr@dgraph.io>'
 __version__ = VERSION
 __status__ = 'development'
 
 
 class DgraphClientStub(object):
+    """Stub for the Dgraph grpc client."""
+
     def __init__(self, addr='localhost:9080', credentials=None, options=None):
         if credentials is None:
             self.channel = grpc.insecure_channel(addr, options)
         else:
-            self.channel = grpc.secure_channel(addr,  credentials, options)
-        
+            self.channel = grpc.secure_channel(addr, credentials, options)
+
         self.stub = api_grpc.DgraphStub(self.channel)
 
-    def alter(self, op, timeout=None, metadata=None, credentials=None):
-        return self.stub.Alter(op, timeout=timeout, metadata=metadata, credentials=credentials)
+    def alter(self, operation, timeout=None, metadata=None, credentials=None):
+        """Runs alter operation."""
+        return self.stub.Alter(operation, timeout=timeout, metadata=metadata,
+                               credentials=credentials)
 
     def query(self, req, timeout=None, metadata=None, credentials=None):
-        return self.stub.Query(req, timeout=timeout, metadata=metadata, credentials=credentials)
-
-    def mutate(self, mu, timeout=None, metadata=None, credentials=None):
-        return self.stub.Mutate(mu, timeout=timeout, metadata=metadata, credentials=credentials)
-
-    def commit_or_abort(self, ctx, timeout=None, metadata=None, credentials=None):
-        return self.stub.CommitOrAbort(ctx, timeout=timeout, metadata=metadata, credentials=credentials)
-
-    def check_version(self, check, timeout=None, metadata=None, credentials=None):
-        return self.stub.CheckVersion(check, timeout=timeout, metadata=metadata, credentials=credentials)
+        """Runs query operation."""
+        return self.stub.Query(req, timeout=timeout, metadata=metadata,
+                               credentials=credentials)
+
+    def mutate(self, mutation, timeout=None, metadata=None, credentials=None):
+        """Runs mutate operation."""
+        return self.stub.Mutate(mutation, timeout=timeout, metadata=metadata,
+                                credentials=credentials)
+
+    def commit_or_abort(self, ctx, timeout=None, metadata=None,
+                        credentials=None):
+        """Runs commint or abort operation."""
+        return self.stub.CommitOrAbort(ctx, timeout=timeout, metadata=metadata,
+                                       credentials=credentials)
+
+    def check_version(self, check, timeout=None, metadata=None,
+                      credentials=None):
+        """Returns the version of the Dgraph instance."""
+        return self.stub.CheckVersion(check, timeout=timeout,
+                                      metadata=metadata,
+                                      credentials=credentials)
 
     def close(self):
+        """Deletes channel and stub."""
         del self.channel
         del self.stub

pydgraph/errors.py

@@ -12,14 +12,19 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+"""Errors thrown by the Dgraph client."""
+
 from pydgraph.meta import VERSION
 
 __author__ = 'Garvit Pahal <garvit@dgraph.io>'
-__maintainer__ = 'Garvit Pahal <garvit@dgraph.io>'
+__maintainer__ = 'Martin Martinez Rivera <martinmr@dgraph.io>'
 __version__ = VERSION
 __status__ = 'development'
 
 
 class AbortedError(Exception):
+    """Error thrown by aborted transactions."""
+
     def __init__(self):
-        super(AbortedError, self).__init__('Transaction has been aborted. Please retry')
+        super(AbortedError, self).__init__(
+            'Transaction has been aborted. Please retry')

pydgraph/meta.py

@@ -12,4 +12,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+"""Metadata about this package."""
+
 VERSION = '1.0.0'