Pyexcel

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**added**

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**updated**

. `70 <https://github.com/pyexcel/pyexcel-io/issues/70>`_: when the given file
is a root directory, the error shall read it is not a file

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**updated**

. `pyexcel185 <https://github.com/pyexcel/pyexcel/issues/185>`_: handle stream
conversion if file type(html) needs string content then bytes to handle

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**updated**

. `69 <https://github.com/pyexcel/pyexcel-io/issues/69>`_: Force file
type(force_file_type) on write

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**updated**

. `68 <https://github.com/pyexcel/pyexcel-io/issues/68>`_: Raise IOError when
the data file does not exist

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**updated**

. `67 <https://github.com/pyexcel/pyexcel-io/issues/67>`_: fix conversion
issue for long type on python 2.7 for ods