Do not acquire list as file handler to close

Author: agraboso

pandas/io/parsers.py

@@ -1766,16 +1766,18 @@ def __init__(self, f, **kwds):
             f = _get_handle(f, 'r', encoding=self.encoding,
                             compression=self.compression,
                             memory_map=self.memory_map)
+            self.handles.append(f)
         elif self.compression:
             f = _wrap_compressed(f, self.compression, self.encoding)
+            self.handles.append(f)
         # in Python 3, convert BytesIO or fileobjects passed with an encoding
         elif compat.PY3 and isinstance(f, compat.BytesIO):
             from io import TextIOWrapper
 
             f = TextIOWrapper(f, encoding=self.encoding)
+            self.handles.append(f)
 
         # Set self.data to something that can read lines.
-        self.handles.append(f)
         if hasattr(f, 'readline'):
             self._make_reader(f)
         else: