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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 update_eol(self, os_name):
 """Update end of line status."""

        os_name = to_text_string(os_name)
        value = {"nt": "CRLF", "posix": "LF"}.get(os_name, "CR")
        self.set_value(value)