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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 version_router(self, request, response, api_version=None, versions={}, not_found=None, **kwargs):
 """Intelligently routes a request to the correct handler based on the version being requested"""

        request_version = self.determine_version(request, api_version)
        if request_version:
            request_version = int(request_version)
        versions.get(request_version or False, versions.get(None, not_found))(request, response,
                                                                              api_version=api_version,
                                                                              **kwargs)