book.py::_convert_content_to_stream incorrectly handling unsupported filetypes

[NickRL21]

After updating pyexcel-io I discovered this bug when intentionally passing an unsupported filetype in one of my unittests.
When passing the unsupported filetype into get_book the expected exception in the past would have been one of (FileTypeNotSupported, NoSupportingPluginFound, SupportingPluginAvailableButNotInstalled) however in book.py::_convert_content_to_stream (line 231) the call to manager.get_io (line 232) results in None causing the write method to be called on a NoneType (line 244) resulting in a generic attribute error.

def _convert_content_to_stream(file_content, file_type):
    stream = manager.get_io(file_type)
    target_content_type = manager.get_io_type(file_type)
    needs_encode = target_content_type == "bytes" and not isinstance(
        file_content, bytes
    )
    needs_decode = target_content_type == "string" and isinstance(
        file_content, bytes
    )
    if needs_encode:
        file_content = file_content.encode("utf-8")
    elif needs_decode:
        file_content = file_content.decode("utf-8")
    stream.write(file_content)
    stream.seek(0)
    return stream

.venv/lib/python3.6/site-packages/pyexcel/core.py:47: in get_book
    book_stream = sources.get_book_stream(**keywords)
.venv/lib/python3.6/site-packages/pyexcel/internal/core.py:39: in get_book_stream
    sheets = a_source.get_data()
.venv/lib/python3.6/site-packages/pyexcel/plugins/sources/memory_input.py:41: in get_data
    self.__file_content, **self._keywords
.venv/lib/python3.6/site-packages/pyexcel/plugins/parsers/excel.py:28: in parse_file_content
    file_content, file_type=self._file_type, **keywords
.venv/lib/python3.6/site-packages/pyexcel/plugins/parsers/excel.py:40: in _parse_any
    sheets = get_data(anything, file_type=file_type, **keywords)
.venv/lib/python3.6/site-packages/pyexcel_io/io.py:87: in get_data
    afile, file_type=file_type, streaming=False, **keywords
.venv/lib/python3.6/site-packages/pyexcel_io/io.py:105: in _get_data
    return load_data(**keywords)
.venv/lib/python3.6/site-packages/pyexcel_io/io.py:193: in load_data
    reader.open_content(file_content, **keywords)
.venv/lib/python3.6/site-packages/pyexcel_io/reader.py:70: in open_content
    file_content, self.file_type
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
file_content = 'foo-bar-data', file_type = 'ods'
    def _convert_content_to_stream(file_content, file_type):
        stream = manager.get_io(file_type)
        target_content_type = manager.get_io_type(file_type)
        needs_encode = target_content_type == "bytes" and not isinstance(
            file_content, bytes
        )
        needs_decode = target_content_type == "string" and isinstance(
            file_content, bytes
        )
        if needs_encode:
            file_content = file_content.encode("utf-8")
        elif needs_decode:
            file_content = file_content.decode("utf-8")
>       stream.write(file_content)
E       AttributeError: 'NoneType' object has no attribute 'write'
.venv/lib/python3.6/site-packages/pyexcel_io/book.py:244: AttributeError

pyexcel version info

pyexcel                                       0.6.5
pyexcel-io                                    0.6.2
pyexcel-xls                                   0.5.8
pyexcel-xlsx                                  0.5.7

[chfw]

thanks for your report. Please verify 0.6.3 and see if the behaviour has been corrected.

[NickRL21]

Working as expected in 0.6.3