WIP: Hunt for open socket continues

Author: h-vetinari

pandas/io/excel.py

@@ -395,8 +395,9 @@ def __init__(self, io, **kwds):
         # to get_filepath_or_buffer()
         if _is_url(self._io):
             io = _urlopen(self._io)
+            should_close = True
         elif not isinstance(self.io, (ExcelFile, xlrd.Book)):
-            io, _, _, _ = get_filepath_or_buffer(self._io)
+            io, _, _, should_close = get_filepath_or_buffer(self._io)
 
         if engine == 'xlrd' and isinstance(io, xlrd.Book):
             self.book = io
@@ -419,6 +420,12 @@ def __init__(self, io, **kwds):
             raise ValueError('Must explicitly set engine if not passing in'
                              ' buffer or path for io.')
 
+        if should_close:
+            try:
+                io.close()
+            except:  # noqa: flake8
+                pass
+
     def __fspath__(self):
         return self._io