Fixing flake8 linting errors

- Enabling builds to fail on simple lint failures now

test/test_examples.py

@@ -11,6 +11,7 @@ hostname = 'localhost'
 
 processes = []
 
+
 @pytest.fixture
 def cleanup():
     yield
@@ -18,7 +19,7 @@ def cleanup():
         p.kill()
 
 
-def run_subprocesses(address, server, client, wildcard_server=False, ipv4_force=True):
+def run_subprocesses(address, server, client, wildcard_server=False, ipv4_force=True): # noqa
     server_attempt = 0
     server_attempts = 2
     done = False
@@ -35,7 +36,7 @@ def run_subprocesses(address, server, client, wildcard_server=False, ipv4_force=
             c_address = '{}:{}'.format(addr, port)
             s_address = c_address
             if wildcard_server:
-                s_address = '*:{}'.format(port) # Use wildcard address for server
+                s_address = '*:{}'.format(port)  # Use wildcard address for server
             print("Forcing ipv4 -> {} => {} {}".format(address, c_address, s_address))
 
         # Start server
@@ -133,7 +134,13 @@ def test_addressbook_example(cleanup):
     assert ret == 0
 
 
-@pytest.mark.skipif(sys.platform == "win32", reason="Asyncio bug with libcapnp timer, likely due to asyncio starving some event loop. See https://github.com/capnproto/pycapnp/issues/196")
+@pytest.mark.skipif(
+    sys.platform == "win32",
+    reason="""
+Asyncio bug with libcapnp timer, likely due to asyncio starving some event loop.
+See https://github.com/capnproto/pycapnp/issues/196
+"""
+)
 def test_async_example(cleanup):
     address = '{}:36434'.format(hostname)
     server = 'async_server.py'
@@ -141,7 +148,13 @@ def test_async_example(cleanup):
     run_subprocesses(address, server, client)
 
 
-@pytest.mark.skipif(sys.platform == "win32", reason="Asyncio bug with libcapnp timer, likely due to asyncio starving some event loop. See https://github.com/capnproto/pycapnp/issues/196")
+@pytest.mark.skipif(
+    sys.platform == "win32",
+    reason="""
+Asyncio bug with libcapnp timer, likely due to asyncio starving some event loop.
+See https://github.com/capnproto/pycapnp/issues/196
+"""
+)
 def test_ssl_async_example(cleanup):
     address = '{}:36435'.format(hostname)
     server = 'async_ssl_server.py'
@@ -149,7 +162,13 @@ def test_ssl_async_example(cleanup):
     run_subprocesses(address, server, client, ipv4_force=False)
 
 
-@pytest.mark.skipif(sys.platform == "win32", reason="Asyncio bug with libcapnp timer, likely due to asyncio starving some event loop. See https://github.com/capnproto/pycapnp/issues/196")
+@pytest.mark.skipif(
+    sys.platform == "win32",
+    reason="""
+Asyncio bug with libcapnp timer, likely due to asyncio starving some event loop.
+See https://github.com/capnproto/pycapnp/issues/196
+"""
+)
 def test_ssl_reconnecting_async_example(cleanup):
     address = '{}:36436'.format(hostname)
     server = 'async_ssl_server.py'

test/test_load.py

@@ -116,4 +116,4 @@ def test_remove_import_hook():
 def test_bundled_import_hook():
     # stream.capnp should be bundled, or provided by the system capnproto
     capnp.add_import_hook()
-    import stream_capnp
+    import stream_capnp  # noqa: F401

test/test_rpc.py

@@ -32,6 +32,7 @@ def test_simple_rpc_with_options():
         remote = cap.foo(i=5)
         _ = remote.wait()
 
+
 def test_simple_rpc_bootstrap():
     read, write = socket.socketpair()
 

test/test_rpc_calculator.py

@@ -2,9 +2,7 @@ import gc
 import os
 import pytest
 import socket
-import subprocess
 import sys  # add examples dir to sys.path
-import time
 
 import capnp
 
@@ -15,10 +13,11 @@ import calculator_client  # noqa: E402
 import calculator_server  # noqa: E402
 
 # Uses run_subprocesses function
-import test_examples
+import test_examples  # noqa: E402
 
 processes = []
 
+
 @pytest.fixture
 def cleanup():
     yield

test/test_serialization.py

@@ -106,6 +106,7 @@ def test_roundtrip_bytes_packed(all_types):
     msg = all_types.TestAllTypes.from_bytes_packed(message_bytes)
     test_regression.check_all_types(msg)
 
+
 @contextmanager
 def _warnings(expected_count=2, expected_text='This message has already been written once.'):
     with warnings.catch_warnings(record=True) as w:
@@ -115,6 +116,7 @@ def _warnings(expected_count=2, expected_text='This message has already been wri
         assert all(issubclass(x.category, UserWarning) for x in w), w
         assert all(expected_text in str(x.message) for x in w), w
 
+
 def test_roundtrip_file_multiple(all_types):
     f = tempfile.TemporaryFile()
     msg = all_types.TestAllTypes.new_message()