@_swallowRequestExceptions(fail_return="<STR_LIT>")<EOL>@_retryConnectionErrors<EOL>@_friendlyAuthError<EOL>@_handleAuth<EOL>def unpublish(namespace, name, version, registry=None):
registry = registry or Registry_Base_URL<EOL>url = '<STR_LIT>' % (<EOL>registry,<EOL>namespace,<EOL>name,<EOL>version<EOL>)<EOL>headers = _headersForRegistry(registry)<EOL>response = requests.delete(url, headers=headers)<EOL>response.raise_for_status()<EOL>return None<EOL>
Try to unpublish a recently published version. Return any errors that
        occur.