diff --git a/trezorlib/transport/__init__.py b/trezorlib/transport/__init__.py
index c586e3fcee..83f35b905b 100644
--- a/trezorlib/transport/__init__.py
+++ b/trezorlib/transport/__init__.py
@@ -17,6 +17,7 @@
 # You should have received a copy of the GNU Lesser General Public License
 # along with this library.  If not, see <http://www.gnu.org/licenses/>.
 
+
 class TransportException(Exception):
     pass
 
@@ -86,7 +87,7 @@ def get_transport(path=None, prefix_search=False):
     # Find whether B is prefix of A (transport name is part of the path)
     # or A is prefix of B (path is a prefix, or a name, of transport).
     # This naively expects that no two transports have a common prefix.
-    def match_prefix(a,b):
+    def match_prefix(a, b):
         return a.startswith(b) or b.startswith(a)
 
     transports = [t for t in all_transports() if match_prefix(path, t.PATH_PREFIX)]
diff --git a/trezorlib/transport/udp.py b/trezorlib/transport/udp.py
index 059222377c..7bbad169c1 100644
--- a/trezorlib/transport/udp.py
+++ b/trezorlib/transport/udp.py
@@ -51,7 +51,7 @@ class UdpTransport(Transport):
 
     def find_debug(self):
         host, port = self.device
-        return UdpTransport('{}:{}'.format(host, port+1), self.protocol)
+        return UdpTransport('{}:{}'.format(host, port + 1), self.protocol)
 
     @classmethod
     def _try_path(cls, path):