Enable flake8 and lint

Author: rth

.travis.yml

@@ -39,9 +39,11 @@ before_install:
   - source ./ci/travis/setup.sh
 
 install:
-  - pip install setuptools-rust pytest pytest-benchmark tox numpy
+  - pip install setuptools-rust pytest pytest-benchmark \
+             tox numpy flake8
 
 script:
+  - flake8 examples/
   - ./ci/travis/test.sh
 
 deploy:

examples/simple-extension/rust_ext/__init__.py

@@ -1 +1 @@
-from .rust_ext import *
+from .rust_ext import *  # noqa

examples/simple-extension/setup.py

@@ -1,12 +1,12 @@
-import os
-import subprocess
 import sys
 from setuptools import find_packages, setup
 from setuptools.command.test import test as TestCommand
 from setuptools_rust import RustExtension
 
+
 class PyTest(TestCommand):
     user_options = []
+
     def run(self):
         self.run_command("test_rust")
         import subprocess
@@ -21,13 +21,15 @@ def get_cfg_flags():
     else:
         return ['--cfg=Py_3']
 
+
 def get_features():
     version = sys.version_info[0:2]
     if version[0] == 2:
         return ['numpy/python2']
     else:
         return ['numpy/python3']
 
+
 setup_requires = ['setuptools-rust>=0.6.0']
 install_requires = ['numpy']
 test_requires = install_requires + ['pytest']

examples/simple-extension/tests/test_ext.py

@@ -1,6 +1,6 @@
 import numpy as np
 from rust_ext import axpy, mult
-import pytest
+
 
 def test_axpy():
     x = np.array([1.0, 2.0, 3.0])
@@ -12,8 +12,8 @@ def test_axpy():
     z = axpy(3.0, x, y)
     np.testing.assert_array_almost_equal(z, np.array([6.0, 9.0, 12.0, 15.0]))
 
+
 def test_mult():
     x = np.array([1.0, 2.0, 3.0])
     mult(3.0, x)
     np.testing.assert_array_almost_equal(x, np.array([3.0, 6.0, 9.0]))
-