Add autopep8-wrapper hook.

pre_commit_hooks/autopep8_wrapper.py

@@ -0,0 +1,28 @@
+from __future__ import absolute_import
+from __future__ import print_function
+from __future__ import unicode_literals
+
+import autopep8
+import io
+import sys
+
+
+def main(argv=None):
+    argv = argv if argv is not None else sys.argv[1:]
+    args = autopep8.parse_args(argv)
+
+    retv = 0
+    for filename in args.files:
+        original_contents = io.open(filename).read()
+        new_contents = autopep8.fix_code(original_contents, args)
+        if original_contents != new_contents:
+            print('Fixing {0}'.format(filename))
+            retv = 1
+            with io.open(filename, 'w') as output_file:
+                output_file.write(new_contents)
+
+    return retv
+
+
+if __name__ == '__main__':
+    exit(main())