______________ test_chunks_have_consistent_numerical_type[python] ______________ [gw0] linux -- Python 3.6.1 /home/vsts/miniconda3/envs/pandas-dev/bin/python all_parsers = <pandas.tests.io.parser.conftest.PythonParser object at 0x7f635d65e470> def test_chunks_have_consistent_numerical_type(all_parsers): parser = all_parsers integers = [str(i) for i in range(499999)] data = "a\n" + "\n".join(integers + ["1.0", "2.0"] + integers) # Coercions should work without warnings. with tm.assert_produces_warning(None): > result = parser.read_csv(StringIO(data)) pandas/tests/io/parser/test_common.py:1204: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ self = <contextlib._GeneratorContextManager object at 0x7f631f91c8d0> type = None, value = None, traceback = None def __exit__(self, type, value, traceback): if type is None: try: > next(self.gen) E AssertionError: Caused unexpected warning(s): [('ResourceWarning', ResourceWarning("unclosed file <_io.BufferedReader name='test1.xlsx'>",),