Add file_io for Jedi for listdir

jedi/file_io.py

@@ -0,0 +1,33 @@
+import os
+
+from parso import file_io
+
+
+class _ListDirMixin(object):
+    def listdir(self):
+        directory = self.path
+        return os.listdir(directory)
+
+
+class ZipFileIO(file_io.KnownContentFileIO):
+    """For .zip and .egg archives"""
+    def __init__(self, path, code, zip_path):
+        super(ZipFileIO, self).__init__(path, code)
+        self._zip_path = zip_path
+
+    def get_last_modified(self):
+        try:
+            return os.path.getmtime(self._zip_path)
+        except OSError:  # Python 3 would probably only need FileNotFoundError
+            return None
+
+    def listdir(self):
+        return []
+
+
+class FileIO(_ListDirMixin, file_io.FileIO):
+    pass
+
+
+class KnownContentFileIO(file_io.KnownContentFileIO):
+    pass