pep8 setup.py and remove cython cpp files

Author: rflamary

setup.py

@@ -9,12 +9,12 @@
 import re
 import os
 import sys
-import subprocess 
+import subprocess
 
 here = path.abspath(path.dirname(__file__))
 
 
-os.environ["CC"] = "g++" 
+os.environ["CC"] = "g++"
 os.environ["CXX"] = "g++"
 
 # dirty but working
@@ -30,61 +30,67 @@
 with open(os.path.join(ROOT, 'README.md'), encoding="utf-8") as f:
     README = f.read()
 
-opt_arg=["-O3"]
+opt_arg = ["-O3"]
+
+# clean cython output is clean is called
+if 'clean' in sys.argv[1:]:
+    if os.path.isfile('ot/lp/emd_wrap.cpp'):
+        os.remove('ot/lp/emd_wrap.cpp')
+
 
 # add platform dependant optional compilation argument
 if sys.platform.startswith('darwin'):
-  opt_arg.append("-stdlib=libc++")
-  sdk_path = subprocess.check_output(['xcrun', '--show-sdk-path'])
-  os.environ['CFLAGS'] = '-isysroot "{}"'.format(sdk_path.rstrip().decode("utf-8"))
+    opt_arg.append("-stdlib=libc++")
+    sdk_path = subprocess.check_output(['xcrun', '--show-sdk-path'])
+    os.environ['CFLAGS'] = '-isysroot "{}"'.format(sdk_path.rstrip().decode("utf-8"))
 
 setup(name='POT',
       version=__version__,
       description='Python Optimal Transport Library',
       long_description=README,
-       long_description_content_type='text/markdown', 
+      long_description_content_type='text/markdown',
       author=u'Remi Flamary, Nicolas Courty',
       author_email='[email protected], [email protected]',
       url='https://github.com/PythonOT/POT',
       packages=find_packages(),
-      ext_modules = cythonize(Extension(
-                "ot.lp.emd_wrap",                                # the extension name
-                 sources=["ot/lp/emd_wrap.pyx", "ot/lp/EMD_wrapper.cpp"], # the Cython source and
-                                                        # additional C++ source files
-                 language="c++",                        # generate and compile C++ code,
-                 include_dirs=[numpy.get_include(),os.path.join(ROOT,'ot/lp')],
-                 extra_compile_args=opt_arg
-                 )),
-      platforms=['linux','macosx','windows'],
+      ext_modules=cythonize(Extension(
+          "ot.lp.emd_wrap",                                # the extension name
+          sources=["ot/lp/emd_wrap.pyx", "ot/lp/EMD_wrapper.cpp"],  # the Cython source and
+          # additional C++ source files
+          language="c++",                        # generate and compile C++ code,
+          include_dirs=[numpy.get_include(), os.path.join(ROOT, 'ot/lp')],
+          extra_compile_args=opt_arg
+      )),
+      platforms=['linux', 'macosx', 'windows'],
       download_url='https://github.com/PythonOT/POT/archive/{}.tar.gz'.format(__version__),
-      license = 'MIT',
+      license='MIT',
       scripts=[],
       data_files=[],
-      requires=["numpy","scipy","cython"],
-      install_requires=["numpy","scipy","cython"],
+      requires=["numpy", "scipy", "cython"],
+      install_requires=["numpy", "scipy", "cython"],
       classifiers=[
-        'Development Status :: 5 - Production/Stable',
-        'Intended Audience :: Developers',
-        'Intended Audience :: Education',
-        'Intended Audience :: Science/Research',
-        'License :: OSI Approved :: MIT License',
-        'Environment :: Console',
-        'Operating System :: OS Independent',
-        'Operating System :: MacOS',
-        'Operating System :: POSIX',
-        'Programming Language :: Python',
-        'Programming Language :: C++',
-        'Programming Language :: C',
-        'Programming Language :: Cython',
-        'Topic :: Utilities',
-        'Topic :: Scientific/Engineering :: Artificial Intelligence',
-        'Topic :: Scientific/Engineering :: Mathematics',
-        'Topic :: Scientific/Engineering :: Information Analysis',
-        'Programming Language :: Python :: 2',
-        'Programming Language :: Python :: 2.7',
-        'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.4',
-        'Programming Language :: Python :: 3.5',
-        'Programming Language :: Python :: 3.6',
-    ]
-     )
+          'Development Status :: 5 - Production/Stable',
+          'Intended Audience :: Developers',
+          'Intended Audience :: Education',
+          'Intended Audience :: Science/Research',
+          'License :: OSI Approved :: MIT License',
+          'Environment :: Console',
+          'Operating System :: OS Independent',
+          'Operating System :: MacOS',
+          'Operating System :: POSIX',
+          'Programming Language :: Python',
+          'Programming Language :: C++',
+          'Programming Language :: C',
+          'Programming Language :: Cython',
+          'Topic :: Utilities',
+          'Topic :: Scientific/Engineering :: Artificial Intelligence',
+          'Topic :: Scientific/Engineering :: Mathematics',
+          'Topic :: Scientific/Engineering :: Information Analysis',
+          'Programming Language :: Python :: 2',
+          'Programming Language :: Python :: 2.7',
+          'Programming Language :: Python :: 3',
+          'Programming Language :: Python :: 3.4',
+          'Programming Language :: Python :: 3.5',
+          'Programming Language :: Python :: 3.6',
+      ]
+      )