            stream must be a file-like object open for reading.

            The StreamReader may use different error handling
            schemes by providing the errors keyword argument. These
            parameters are predefined:

             'strict' - raise a ValueError (or a subclass)
             'ignore' - ignore the character and continue with the next
             'replace'- replace with a suitable replacement character
             'backslashreplace' - Replace with backslashed escape sequences;

            The set of allowed parameter values can be extended via
            register_error.
        r?