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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 fileinfo(fileobj, filename=None, content_type=None, existing=None):
 """Tries to extract from the given input the actual file object, filename and content_type This is used by the create and replace methods to correctly deduce their parameters from the available information when possible. """

        return _FileInfo(fileobj, filename, content_type).get_info(existing)