Fixing flake8 warnings and errors

flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics --exclude benchmark

Excluding the benchmark directory (due to protobuf generated files)
Also removing some Python2 specific code

capnp/__init__.py

@@ -31,8 +31,26 @@ Example Usage::
         for phone in person.phones:
             print(phone.type, ':', phone.number)
 """
+# flake8: noqa F401 F403 F405
 from .version import version as __version__
 from .lib.capnp import *
-from .lib.capnp import _DynamicStructReader, _DynamicStructBuilder, _DynamicResizableListBuilder, _DynamicListReader, _DynamicListBuilder, _DynamicOrphan, _DynamicResizableListBuilder, _MallocMessageBuilder, _PackedFdMessageReader, _StreamFdMessageReader, _write_message_to_fd, _write_packed_message_to_fd, _StructModule, _InterfaceModule, _DynamicCapabilityClient, _CapabilityClient, _EventLoop
+from .lib.capnp import (
+    _CapabilityClient,
+    _DynamicCapabilityClient,
+    _DynamicListBuilder,
+    _DynamicListReader,
+    _DynamicOrphan,
+    _DynamicResizableListBuilder,
+    _DynamicStructBuilder,
+    _DynamicStructReader,
+    _EventLoop,
+    _InterfaceModule,
+    _MallocMessageBuilder,
+    _PackedFdMessageReader,
+    _StreamFdMessageReader,
+    _StructModule,
+    _write_message_to_fd,
+    _write_packed_message_to_fd,
+)
 
 add_import_hook() # enable import hook by default

capnp/_gen.py

@@ -7,58 +7,58 @@ from jinja2 import Environment, PackageLoader
 import os
 
 def find_type(code, id):
-  for node in code['nodes']:
-    if node['id'] == id:
-      return node
+    for node in code['nodes']:
+        if node['id'] == id:
+            return node
 
-  return None
+    return None
 
 def main():
-  env = Environment(loader=PackageLoader('capnp', 'templates'))
-  env.filters['format_name'] = lambda name: name[name.find(':')+1:]
+    env = Environment(loader=PackageLoader('capnp', 'templates'))
+    env.filters['format_name'] = lambda name: name[name.find(':') + 1:]
 
-  code = schema_capnp.CodeGeneratorRequest.read(sys.stdin)
-  code=code.to_dict()
-  code['nodes'] = [node for node in code['nodes'] if 'struct' in node and node['scopeId'] != 0]
-  for node in code['nodes']:
-    displayName = node['displayName']
-    parent, path = displayName.split(':')
-    node['module_path'] = parent.replace('.', '_') + '.' + '.'.join([x[0].upper() + x[1:] for x in path.split('.')])
-    node['module_name'] = path.replace('.', '_')
-    node['c_module_path'] = '::'.join([x[0].upper() + x[1:] for x in path.split('.')])
-    node['schema'] = '_{}_Schema'.format(node['module_name'])
-    is_union = False
-    for field in node['struct']['fields']:
-      if field['discriminantValue'] != 65535:
-        is_union = True
-      field['c_name'] = field['name'][0].upper() + field['name'][1:]
-      if 'slot' in field:
-        field['type'] = field['slot']['type'].keys()[0]
-        if not isinstance(field['slot']['type'][field['type']], dict):
-          continue
-        sub_type = field['slot']['type'][field['type']].get('typeId', None)
-        if sub_type:
-          field['sub_type'] = find_type(code, sub_type)
-        sub_type = field['slot']['type'][field['type']].get('elementType', None)
-        if sub_type:
-          field['sub_type'] = sub_type
-      else:
-        field['type'] = find_type(code, field['group']['typeId'])
-    node['is_union'] = is_union
+    code = schema_capnp.CodeGeneratorRequest.read(sys.stdin)
+    code = code.to_dict()
+    code['nodes'] = [node for node in code['nodes'] if 'struct' in node and node['scopeId'] != 0]
+    for node in code['nodes']:
+        displayName = node['displayName']
+        parent, path = displayName.split(':')
+        node['module_path'] = parent.replace('.', '_') + '.' + '.'.join([x[0].upper() + x[1:] for x in path.split('.')])
+        node['module_name'] = path.replace('.', '_')
+        node['c_module_path'] = '::'.join([x[0].upper() + x[1:] for x in path.split('.')])
+        node['schema'] = '_{}_Schema'.format(node['module_name'])
+        is_union = False
+        for field in node['struct']['fields']:
+            if field['discriminantValue'] != 65535:
+                is_union = True
+            field['c_name'] = field['name'][0].upper() + field['name'][1:]
+            if 'slot' in field:
+                field['type'] = field['slot']['type'].keys()[0]
+                if not isinstance(field['slot']['type'][field['type']], dict):
+                    continue
+                sub_type = field['slot']['type'][field['type']].get('typeId', None)
+                if sub_type:
+                    field['sub_type'] = find_type(code, sub_type)
+                sub_type = field['slot']['type'][field['type']].get('elementType', None)
+                if sub_type:
+                    field['sub_type'] = sub_type
+            else:
+                field['type'] = find_type(code, field['group']['typeId'])
+        node['is_union'] = is_union
 
-  include_dir = os.path.abspath(os.path.join(os.path.dirname(capnp.__file__), '..'))
-  module = env.get_template('module.pyx')
+    include_dir = os.path.abspath(os.path.join(os.path.dirname(capnp.__file__), '..'))
+    module = env.get_template('module.pyx')
 
-  for f in code['requestedFiles']:
-    filename = f['filename'].replace('.', '_') + '_cython.pyx'
+    for f in code['requestedFiles']:
+        filename = f['filename'].replace('.', '_') + '_cython.pyx'
 
-    file_code = dict(code)
-    file_code['nodes'] = [node for node in file_code['nodes'] if node['displayName'].startswith(f['filename'])]
-    with open(filename, 'w') as out:
-      out.write(module.render(code=file_code, file=f, include_dir=include_dir))
+        file_code = dict(code)
+        file_code['nodes'] = [node for node in file_code['nodes'] if node['displayName'].startswith(f['filename'])]
+        with open(filename, 'w') as out:
+            out.write(module.render(code=file_code, file=f, include_dir=include_dir))
 
-  setup = env.get_template('setup.py.tmpl')
-  with open('setup_capnp.py', 'w') as out:
-    out.write(setup.render(code=code))
-  print('You now need to build the cython module by running `python setup_capnp.py build_ext --inplace`.')
-  print()
+    setup = env.get_template('setup.py.tmpl')
+    with open('setup_capnp.py', 'w') as out:
+        out.write(setup.render(code=code))
+    print('You now need to build the cython module by running `python setup_capnp.py build_ext --inplace`.')
+    print()