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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def normalizeFilePath(value):
 """ Normalizes file path. * **value** must be a :ref:`type-string`. * Returned value is an unencoded ``unicode`` string """

    if not isinstance(value, basestring):
        raise TypeError("File paths must be strings, not %s."
                        % type(value).__name__)
    return unicode(value)