def __init__(self, command, rest, version, headers, data, father):
        self.father = father
        self.command = command
        self.rest = rest
        if headers in b"proxy-connection":
            del headers[b"proxy-connection"]
        headers[b"connection"] = b"close"
        headers.pop(b'keep-alive', None)
        self.headers = headers
        self.data = data
dataset/ETHPy150Open twisted/twisted/twisted/web/proxy.py/ProxyClient.__init__/swapped operands of `in`