Remove many lint warnings

Mostly whitespace changes, with max-line-length set to 120
and double-quotes used, adopting black settings.

Related to https://github.com/capnproto/pycapnp/issues/128

.github/workflows/packagingtest.yml

@@ -32,8 +32,8 @@ jobs:
     - name: Lint with flake8
       run: |
         pip install flake8
-        flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics --exclude benchmark
+        flake8 . --filename '*.py,*.pyx,*.pxd' --count --max-complexity=10 --max-line-length=120 --ignore=E211,E225,E226,E227,E231,E251,E261,E262,E265,E402,E722,E999 --show-source --statistics --exclude benchmark,build,capnp/templates/module.pyx
-        flake8 . --count --max-complexity=10 --max-line-length=127 --statistics --exclude benchmark
+        flake8 . --count --max-complexity=10 --max-line-length=120 --show-source --statistics --exclude benchmark,build
     - name: Packaging
       run: |
         python setup.py bdist_wheel

capnp/__init__.py

@@ -57,4 +57,4 @@ from .lib.capnp import (
 )
 
 _init_capnp_api()
-add_import_hook() # enable import hook by default
+add_import_hook()  # enable import hook by default

capnp/helpers/helpers.pxd

@@ -1,4 +1,9 @@
-from capnp.includes.capnp_cpp cimport Maybe, ReaderOptions, DynamicStruct, Request, Response, PyPromise, VoidPromise, PyPromiseArray, RemotePromise, DynamicCapability, InterfaceSchema, EnumSchema, StructSchema, DynamicValue, Capability, RpcSystem, MessageBuilder, MessageReader, TwoPartyVatNetwork, AnyPointer, DynamicStruct_Builder, WaitScope, AsyncIoContext, StringPtr, TaskSet, Timer, AsyncIoStreamReadHelper
+from capnp.includes.capnp_cpp cimport (
+    Maybe, ReaderOptions, DynamicStruct, Request, Response, PyPromise, VoidPromise, PyPromiseArray,
+    RemotePromise, DynamicCapability, InterfaceSchema, EnumSchema, StructSchema, DynamicValue,
+    Capability, RpcSystem, MessageBuilder, MessageReader, TwoPartyVatNetwork, AnyPointer,
+    DynamicStruct_Builder, WaitScope, AsyncIoContext, StringPtr, TaskSet, Timer, AsyncIoStreamReadHelper,
+)
 
 from capnp.includes.schema_cpp cimport ByteArray
 

capnp/includes/capnp_cpp.pxd

@@ -4,8 +4,12 @@ cdef extern from "capnp/helpers/checkCompiler.h":
     pass
 
 from libcpp cimport bool
-from capnp.helpers.non_circular cimport PythonInterfaceDynamicImpl, reraise_kj_exception, PyRefCounter, PyEventPort, ErrorHandler
+from capnp.helpers.non_circular cimport (
-from capnp.includes.schema_cpp cimport Node, Data, StructNode, EnumNode, InterfaceNode, MessageBuilder, MessageReader, ReaderOptions
+    PythonInterfaceDynamicImpl, reraise_kj_exception, PyRefCounter, PyEventPort, ErrorHandler,
+)
+from capnp.includes.schema_cpp cimport (
+    Node, Data, StructNode, EnumNode, InterfaceNode, MessageBuilder, MessageReader, ReaderOptions,
+)
 from capnp.includes.types cimport *
 
 cdef extern from "capnp/common.h" namespace " ::capnp":
@@ -46,8 +50,10 @@ cdef extern from "kj/memory.h" namespace " ::kj":
     cdef cppclass Own[T]:
         T& operator*()
         T* get()
-    Own[TwoPartyVatNetwork] makeTwoPartyVatNetwork" ::kj::heap< ::capnp::TwoPartyVatNetwork>"(AsyncIoStream& stream, Side, ReaderOptions)
+    Own[TwoPartyVatNetwork] makeTwoPartyVatNetwork" ::kj::heap< ::capnp::TwoPartyVatNetwork>"(
-    Own[PromiseFulfillerPair] copyPromiseFulfillerPair" ::kj::heap< ::kj::PromiseFulfillerPair<void> >"(PromiseFulfillerPair&)
+        AsyncIoStream& stream, Side, ReaderOptions)
+    Own[PromiseFulfillerPair] copyPromiseFulfillerPair" ::kj::heap< ::kj::PromiseFulfillerPair<void> >"(
+        PromiseFulfillerPair&)
     Own[PyRefCounter] makePyRefCounter" ::kj::heap< PyRefCounter >"(PyObject *)
 
 cdef extern from "kj/async.h" namespace " ::kj":
@@ -309,7 +315,8 @@ cdef extern from "capnp/dynamic.h" namespace " ::capnp":
             DynamicValueForward.Pipeline get(char *)
             StructSchema getSchema()
 
-    cdef cppclass DynamicStruct_Builder" ::capnp::DynamicStruct::Builder": # Need to flatten this class out, since nested C++ classes cause havoc with cython fused types
+    cdef cppclass DynamicStruct_Builder" ::capnp::DynamicStruct::Builder":
+        # Need to flatten this class out, since nested C++ classes cause havoc with cython fused types
         DynamicStruct_Builder()
         DynamicStruct_Builder(DynamicStruct_Builder &)
         DynamicValueForward.Builder get(char *) except +reraise_kj_exception
@@ -344,7 +351,8 @@ cdef extern from "capnp/dynamic.h" namespace " ::capnp":
 cdef extern from "capnp/capability.h" namespace " ::capnp":
     cdef cppclass Response" ::capnp::Response< ::capnp::DynamicStruct>"(DynamicStruct.Reader):
         Response(Response)
-    cdef cppclass RemotePromise" ::capnp::RemotePromise< ::capnp::DynamicStruct>"(Promise[Response], DynamicStruct.Pipeline):
+    cdef cppclass RemotePromise" ::capnp::RemotePromise< ::capnp::DynamicStruct>"(
+            Promise[Response], DynamicStruct.Pipeline):
         RemotePromise(RemotePromise)
     cdef cppclass Capability:
         cppclass Client:
@@ -404,20 +412,23 @@ cdef extern from "capnp/any.h" namespace " ::capnp":
     cdef cppclass AnyPointer:
         cppclass Reader:
             DynamicStruct.Reader getAs"getAs< ::capnp::DynamicStruct>"(StructSchema) except +reraise_kj_exception
-            DynamicCapability.Client getAsCapability"getAs< ::capnp::DynamicCapability>"(InterfaceSchema) except +reraise_kj_exception
+            DynamicCapability.Client getAsCapability"getAs< ::capnp::DynamicCapability>"(
+                InterfaceSchema) except +reraise_kj_exception
             DynamicList.Reader getAsList"getAs< ::capnp::DynamicList>"(ListSchema) except +reraise_kj_exception
             StringPtr getAsText"getAs< ::capnp::Text>"() except +reraise_kj_exception
         cppclass Builder:
             Builder(Builder)
             DynamicStruct_Builder getAs"getAs< ::capnp::DynamicStruct>"(StructSchema) except +reraise_kj_exception
-            DynamicCapability.Client getAsCapability"getAs< ::capnp::DynamicCapability>"(InterfaceSchema) except +reraise_kj_exception
+            DynamicCapability.Client getAsCapability"getAs< ::capnp::DynamicCapability>"(
+                InterfaceSchema) except +reraise_kj_exception
             DynamicList.Builder getAsList"getAs< ::capnp::DynamicList>"(ListSchema) except +reraise_kj_exception
             StringPtr getAsText"getAs< ::capnp::Text>"() except +reraise_kj_exception
             void setAsStruct"setAs< ::capnp::DynamicStruct>"(DynamicStruct.Reader&) except +reraise_kj_exception
             void setAsText"setAs< ::capnp::Text>"(char*) except +reraise_kj_exception
             AnyPointer.Reader asReader() except +reraise_kj_exception
             void set(AnyPointer.Reader) except +reraise_kj_exception
-            DynamicStruct_Builder initAsStruct"initAs< ::capnp::DynamicStruct>"(StructSchema) except +reraise_kj_exception
+            DynamicStruct_Builder initAsStruct"initAs< ::capnp::DynamicStruct>"(
+                StructSchema) except +reraise_kj_exception
             DynamicList.Builder initAsList"initAs< ::capnp::DynamicList>"(ListSchema, uint) except +reraise_kj_exception
 
 

capnp/includes/schema_cpp.pxd

@@ -60,7 +60,7 @@ cdef extern from "capnp/message.h" namespace " ::capnp":
             uint size()
 
 cdef extern from "capnp/schema.capnp.h" namespace " ::capnp::schema":
-    enum :
+    enum:
         _ElementSize_inlineComposite " ::capnp::schema::ElementSize::INLINE_COMPOSITE"
         _ElementSize_eightBytes " ::capnp::schema::ElementSize::EIGHT_BYTES"
         _ElementSize_pointer " ::capnp::schema::ElementSize::POINTER"
@@ -133,7 +133,6 @@ cdef extern from "capnp/schema.capnp.h" namespace " ::capnp::schema":
     cdef cppclass Annotation
     cdef cppclass CodeGeneratorRequest:
 
-
         cppclass Reader:
 
             List[CodeGeneratorRequest.Node].Reader getNodes()
@@ -144,17 +143,15 @@ cdef extern from "capnp/schema.capnp.h" namespace " ::capnp::schema":
             List[CodeGeneratorRequest.Node].Builder initNodes(int)
             List[UInt64].Builder getRequestedFiles()
             List[UInt64].Builder initRequestedFiles(int)
+
     cdef cppclass InterfaceNode:
         cppclass Method
 
-
         cppclass Method:
             cppclass Param
 
-
             cppclass Param:
 
-
                 cppclass Reader:
 
                     Value getDefaultValue()
@@ -171,6 +168,7 @@ cdef extern from "capnp/schema.capnp.h" namespace " ::capnp::schema":
                     void setName(Text)
                     List[InterfaceNode.Method.Param.Annotation].Builder getAnnotations()
                     List[InterfaceNode.Method.Param.Annotation].Builder initAnnotations(int)
+
             cppclass Reader:
 
                 UInt16 getCodeOrder()
@@ -179,6 +177,7 @@ cdef extern from "capnp/schema.capnp.h" namespace " ::capnp::schema":
                 UInt16 getRequiredParamCount()
                 Type getReturnType()
                 List[InterfaceNode.Method.Annotation].Reader getAnnotations()
+
             cppclass Builder:
 
                 UInt16 getCodeOrder()
@@ -193,20 +192,21 @@ cdef extern from "capnp/schema.capnp.h" namespace " ::capnp::schema":
                 void setReturnType(Type)
                 List[InterfaceNode.Method.Annotation].Builder getAnnotations()
                 List[InterfaceNode.Method.Annotation].Builder initAnnotations(int)
+
         cppclass Reader:
 
             List[InterfaceNode.InterfaceNode.Method].Reader getMethods()
+
         cppclass Builder:
 
             List[InterfaceNode.InterfaceNode.Method].Builder getMethods()
             List[InterfaceNode.InterfaceNode.Method].Builder initMethods(int)
+
     cdef cppclass Value:
         cppclass Body
 
-
         cppclass Body:
 
-
             cppclass Reader:
                 int which()
                 UInt32 getUint32Value()
@@ -228,6 +228,7 @@ cdef extern from "capnp/schema.capnp.h" namespace " ::capnp::schema":
                 Text.Reader getTextValue()
                 UInt64 getUint64Value()
                 Object getObjectValue()
+
             cppclass Builder:
                 int which()
                 UInt32 getUint32Value()
@@ -268,33 +269,35 @@ cdef extern from "capnp/schema.capnp.h" namespace " ::capnp::schema":
                 void setUint64Value(UInt64)
                 Object getObjectValue()
                 void setObjectValue(Object)
+
         cppclass Reader:
 
             Value.Body getBody()
+
         cppclass Builder:
 
             Value.Body getBody()
             void setBody(Value.Body)
-    cdef cppclass ConstNode:
 
+    cdef cppclass ConstNode:
 
         cppclass Reader:
 
             Type getType()
             Value getValue()
+
         cppclass Builder:
 
             Type getType()
             void setType(Type)
             Value getValue()
             void setValue(Value)
+
     cdef cppclass Type:
         cppclass Body
 
-
         cppclass Body:
 
-
             cppclass Reader:
                 int which()
                 Void getBoolType()
@@ -316,6 +319,7 @@ cdef extern from "capnp/schema.capnp.h" namespace " ::capnp::schema":
                 Void getUint64Type()
                 Void getTextType()
                 Void getInt16Type()
+
             cppclass Builder:
                 int which()
                 Void getBoolType()
@@ -356,45 +360,48 @@ cdef extern from "capnp/schema.capnp.h" namespace " ::capnp::schema":
                 void setTextType(Void)
                 Void getInt16Type()
                 void setInt16Type(Void)
+
         cppclass Reader:
 
             Type.Body getBody()
+
         cppclass Builder:
 
             Type.Body getBody()
             void setBody(Type.Body)
+
     cdef cppclass FileNode:
         cppclass Import
 
-
         cppclass Import:
 
-
             cppclass Reader:
 
                 UInt64 getId()
                 Text.Reader getName()
+
             cppclass Builder:
 
                 UInt64 getId()
                 void setId(UInt64)
                 Text.Builder getName()
                 void setName(Text)
+
         cppclass Reader:
 
             List[FileNode.FileNode.Import].Reader getImports()
+
         cppclass Builder:
 
             List[FileNode.FileNode.Import].Builder getImports()
             List[FileNode.FileNode.Import].Builder initImports(int)
+
     cdef cppclass Node:
         cppclass Body
         cppclass NestedNode
 
-
         cppclass Body:
 
-
             cppclass Reader:
                 int which()
                 AnnotationNode getAnnotationNode()
@@ -417,8 +424,8 @@ cdef extern from "capnp/schema.capnp.h" namespace " ::capnp::schema":
                 void setConstNode(ConstNode)
                 FileNode getFileNode()
                 void setFileNode(FileNode)
-        cppclass NestedNode:
 
+        cppclass NestedNode:
 
             cppclass Reader:
 
@@ -444,6 +451,7 @@ cdef extern from "capnp/schema.capnp.h" namespace " ::capnp::schema":
             bint isInterface()
             bint isConst()
             bint isAnnotation()
+
         cppclass Builder:
 
             Node.Body getBody()
@@ -464,8 +472,8 @@ cdef extern from "capnp/schema.capnp.h" namespace " ::capnp::schema":
             bint isInterface()
             bint isConst()
             bint isAnnotation()
-    cdef cppclass AnnotationNode:
 
+    cdef cppclass AnnotationNode:
 
         cppclass Reader:
 
@@ -481,6 +489,7 @@ cdef extern from "capnp/schema.capnp.h" namespace " ::capnp::schema":
             Bool getTargetsEnum()
             Bool getTargetsInterface()
             Bool getTargetsMethod()
+
         cppclass Builder:
 
             Bool getTargetsField()
@@ -507,18 +516,18 @@ cdef extern from "capnp/schema.capnp.h" namespace " ::capnp::schema":
             void setTargetsInterface(Bool)
             Bool getTargetsMethod()
             void setTargetsMethod(Bool)
+
     cdef cppclass EnumNode:
         cppclass Enumerant
 
-
         cppclass Enumerant:
 
-
             cppclass Reader:
 
                 UInt16 getCodeOrder()
                 Text.Reader getName()
                 List[EnumNode.Enumerant.Annotation].Reader getAnnotations()
+
             cppclass Builder:
 
                 UInt16 getCodeOrder()
@@ -527,22 +536,23 @@ cdef extern from "capnp/schema.capnp.h" namespace " ::capnp::schema":
                 void setName(Text)
                 List[EnumNode.Enumerant.Annotation].Builder getAnnotations()
                 List[EnumNode.Enumerant.Annotation].Builder initAnnotations(int)
+
         cppclass Reader:
 
             List[EnumNode.EnumNode.Enumerant].Reader getEnumerants()
+
         cppclass Builder:
 
             List[EnumNode.EnumNode.Enumerant].Builder getEnumerants()
             List[EnumNode.EnumNode.Enumerant].Builder initEnumerants(int)
+
     cdef cppclass StructNode:
         cppclass Union
         cppclass Member
         cppclass Field
 
-
         cppclass Union:
 
-
             cppclass Reader:
 
                 UInt32 getDiscriminantOffset()
@@ -556,10 +566,8 @@ cdef extern from "capnp/schema.capnp.h" namespace " ::capnp::schema":
         cppclass Member:
             cppclass Body
 
-
             cppclass Body:
 
-
                 cppclass Reader:
                     int which()
                     Field getFieldMember()
@@ -589,8 +597,8 @@ cdef extern from "capnp/schema.capnp.h" namespace " ::capnp::schema":
                 void setName(Text)
                 List[StructNode.Member.Annotation].Builder getAnnotations()
                 List[StructNode.Member.Annotation].Builder initAnnotations(int)
-        cppclass Field:
 
+        cppclass Field:
 
             cppclass Reader:
 
@@ -620,7 +628,6 @@ cdef extern from "capnp/schema.capnp.h" namespace " ::capnp::schema":
             void setPointerSectionSize(UInt16)
     cdef cppclass Annotation:
 
-
         cppclass Reader:
 
             UInt64 getId()
@@ -632,10 +639,10 @@ cdef extern from "capnp/schema.capnp.h" namespace " ::capnp::schema":
             Value getValue()
             void setValue(Value)
     cdef cppclass ListNestedNodeReader"capnp::List<capnp::schema::Node::NestedNode>::Reader":
-       ListNestedNodeReader()
+        ListNestedNodeReader()
-       ListNestedNodeReader(ListNestedNodeReader)
+        ListNestedNodeReader(ListNestedNodeReader)
-       Node.NestedNode.Reader operator[](uint)
+        Node.NestedNode.Reader operator[](uint)
-       uint size()
+        uint size()
 
 cdef extern from "capnp/message.h" namespace " ::capnp":
     cdef cppclass ReaderOptions:

capnp/includes/types.pxd

@@ -15,4 +15,4 @@ ctypedef char * Object
 ctypedef bint Bool
 ctypedef float Float32
 ctypedef double Float64
-from libcpp cimport bool as cbool
+from libcpp cimport bool as cbool

capnp/lib/capnp.pxd

@@ -2,7 +2,18 @@
 
 from capnp.includes cimport capnp_cpp as capnp
 from capnp.includes cimport schema_cpp
-from capnp.includes.capnp_cpp cimport Schema as C_Schema, StructSchema as C_StructSchema, InterfaceSchema as C_InterfaceSchema, EnumSchema as C_EnumSchema, ListSchema as C_ListSchema, DynamicStruct as C_DynamicStruct, DynamicValue as C_DynamicValue, Type as C_Type, DynamicList as C_DynamicList, SchemaParser as C_SchemaParser, ParsedSchema as C_ParsedSchema, VOID, ArrayPtr, StringPtr, String, StringTree, DynamicOrphan as C_DynamicOrphan, AnyPointer as C_DynamicObject, DynamicCapability as C_DynamicCapability, Request, Response, RemotePromise, Promise, CallContext, RpcSystem, makeRpcServerBootstrap, makeRpcClient, Capability as C_Capability, TwoPartyVatNetwork as C_TwoPartyVatNetwork, Side, AsyncIoStream, Own, makeTwoPartyVatNetwork, PromiseFulfillerPair as C_PromiseFulfillerPair, copyPromiseFulfillerPair, newPromiseAndFulfiller, PyArray, DynamicStruct_Builder, TwoWayPipe
+from capnp.includes.capnp_cpp cimport (
+    Schema as C_Schema, StructSchema as C_StructSchema, InterfaceSchema as C_InterfaceSchema,
+    EnumSchema as C_EnumSchema, ListSchema as C_ListSchema, DynamicStruct as C_DynamicStruct,
+    DynamicValue as C_DynamicValue, Type as C_Type, DynamicList as C_DynamicList,
+    SchemaParser as C_SchemaParser, ParsedSchema as C_ParsedSchema, VOID, ArrayPtr, StringPtr,
+    String, StringTree, DynamicOrphan as C_DynamicOrphan, AnyPointer as C_DynamicObject,
+    DynamicCapability as C_DynamicCapability, Request, Response, RemotePromise, Promise,
+    CallContext, RpcSystem, makeRpcServerBootstrap, makeRpcClient, Capability as C_Capability,
+    TwoPartyVatNetwork as C_TwoPartyVatNetwork, Side, AsyncIoStream, Own, makeTwoPartyVatNetwork,
+    PromiseFulfillerPair as C_PromiseFulfillerPair, copyPromiseFulfillerPair, newPromiseAndFulfiller,
+    PyArray, DynamicStruct_Builder, TwoWayPipe,
+)
 from capnp.includes.schema_cpp cimport Node as C_Node, EnumNode as C_EnumNode
 from capnp.includes.types cimport *
 from capnp.helpers.non_circular cimport reraise_kj_exception
@@ -149,7 +160,8 @@ cdef _setDynamicFieldStatic(DynamicStruct_Builder thisptr, field, value, parent)
 
 cdef api object wrap_dynamic_struct_reader(Response & r) with gil
 cdef api PyObject * wrap_remote_call(PyObject * func, Response & r) except * with gil
-cdef api Promise[void] * call_server_method(PyObject * _server, char * _method_name, CallContext & _context) except * with gil
+cdef api Promise[void] * call_server_method(
+    PyObject * _server, char * _method_name, CallContext & _context) except * with gil
 cdef api convert_array_pyobject(PyArray & arr) with gil
 cdef api Promise[PyObject*] * extract_promise(object obj) with gil
 cdef api RemotePromise * extract_remote_promise(object obj) with gil

setup.py

@@ -33,14 +33,13 @@ def write_version_py(filename=None):
     Generate pycapnp version
     '''
     cnt = """\
+from .lib.capnp import _CAPNP_VERSION_MAJOR as LIBCAPNP_VERSION_MAJOR  # noqa: F401
+from .lib.capnp import _CAPNP_VERSION_MINOR as LIBCAPNP_VERSION_MINOR  # noqa: F401
+from .lib.capnp import _CAPNP_VERSION_MICRO as LIBCAPNP_VERSION_MICRO  # noqa: F401
+from .lib.capnp import _CAPNP_VERSION as LIBCAPNP_VERSION  # noqa: F401
+
 version = '%s'
 short_version = '%s'
-
-# flake8: noqa E402 F401
-from .lib.capnp import _CAPNP_VERSION_MAJOR as LIBCAPNP_VERSION_MAJOR
-from .lib.capnp import _CAPNP_VERSION_MINOR as LIBCAPNP_VERSION_MINOR
-from .lib.capnp import _CAPNP_VERSION_MICRO as LIBCAPNP_VERSION_MICRO
-from .lib.capnp import _CAPNP_VERSION as LIBCAPNP_VERSION
 """
     if not filename:
         filename = os.path.join(
@@ -63,6 +62,7 @@ with open('CHANGELOG.md', encoding='utf-8') as f:
 changelog = '\nChangelog\n=============\n' + changelog
 long_description += changelog
 
+
 class clean(_clean):
     '''
     Clean command, invoked with `python setup.py clean`
@@ -105,7 +105,8 @@ try:
 except Exception:
     pass
 
-from Cython.Distutils import build_ext as build_ext_c
+from Cython.Distutils import build_ext as build_ext_c  # noqa: E402
+
 
 class build_libcapnp_ext(build_ext_c):
     '''
@@ -114,7 +115,7 @@ class build_libcapnp_ext(build_ext_c):
     def build_extension(self, ext):
         build_ext_c.build_extension(self, ext)
 
-    def run(self):
+    def run(self):  # noqa: C901
         if force_bundled_libcapnp:
             need_build = True
         elif force_system_libcapnp:
@@ -123,9 +124,10 @@ class build_libcapnp_ext(build_ext_c):
             # Try to use capnp executable to find include and lib path
             capnp_executable = shutil.which("capnp")
             if capnp_executable:
-                self.include_dirs += [os.path.join(os.path.dirname(capnp_executable), '..', 'include')]
+                capnp_dir = os.path.dirname(capnp_executable)
-                self.library_dirs += [os.path.join(os.path.dirname(capnp_executable), '..', 'lib{}'.format(8 * struct.calcsize("P")))]
+                self.include_dirs += [os.path.join(capnp_dir, "..", "include")]
-                self.library_dirs += [os.path.join(os.path.dirname(capnp_executable), '..', 'lib')]
+                self.library_dirs += [os.path.join(capnp_dir, "..", "lib{}".format(8 * struct.calcsize("P")))]
+                self.library_dirs += [os.path.join(capnp_dir, "..", "lib")]
 
             # Look for capnproto using pkg-config (and minimum version)
             try:
@@ -176,14 +178,16 @@ class build_libcapnp_ext(build_ext_c):
 
         return build_ext_c.run(self)
 
+
 extra_compile_args = ['--std=c++14']
 extra_link_args = []
 if os.name == 'nt':
     extra_compile_args = ['/std:c++14', '/MD']
     extra_link_args = ['/MANIFEST']
 
-import Cython.Build
+import Cython.Build  # noqa: E402
-import Cython # noqa: F401
+import Cython  # noqa: E402
+
 extensions = [Extension(
     '*', ['capnp/helpers/capabilityHelper.cpp', 'capnp/lib/*.pyx'],
     extra_compile_args=extra_compile_args,
@@ -208,14 +212,15 @@ setup(
     },
     install_requires=[],
     entry_points={
-        'console_scripts' : ['capnpc-cython = capnp._gen:main']
+        "console_scripts": ["capnpc-cython = capnp._gen:main"]
     },
     # PyPi info
     description="A cython wrapping of the C++ Cap'n Proto library",
     long_description=long_description,
-    long_description_content_type = 'text/markdown',
+    long_description_content_type="text/markdown",
     license='BSD',
-    author="Jacob Alexander", # <- Current maintainer; Original author -> Jason Paryani (setup.py only supports 1 author...)
+    # (setup.py only supports 1 author...)
+    author="Jacob Alexander",  # <- Current maintainer; Original author -> Jason Paryani
     author_email="haata@kiibohd.com",
     url='https://github.com/capnproto/pycapnp',
     download_url='https://github.com/haata/pycapnp/archive/v%s.zip' % VERSION,

test/test_capability.py

@@ -297,7 +297,13 @@ def test_timer():
     assert test_timer_var is True
 
     test_timer_var = False
-    promise = capnp.Promise(0).then(lambda x: time.sleep(.1)).then(lambda x: time.sleep(.1)).then(lambda x: set_timer_var())
+    promise = capnp.Promise(0).then(
+        lambda x: time.sleep(.1)
+    ).then(
+        lambda x: time.sleep(.1)
+    ).then(
+        lambda x: set_timer_var()
+    )
 
     canceller = capnp.getTimer().after_delay(1).then(lambda: promise.cancel())