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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 get_os_version(self, version_text):
 """Return the OS version information from the device."""

        os_version = None
        if version_text is None:
            return os_version
        match = re.search(self.version_re, version_text, re.MULTILINE)
        if match:
            os_version = match.group(1)

        return os_version