python 多线程对post请求服务器测试并发

# -*- coding: utf-8 -*-
import requests
import threading
import time
class postrequests():
    def __init__(self):
        self.url = '请求网址'
        self.files  = {
    'unknown_image':open('刘诗诗.jpg','rb')
}
    def post(self):
        try:
            r = requests.post(self.url,files=self.files)
            print(r.text)
        except Exception as e:
            print(e)

def login():
    login = postrequests()
    return login.post()
# if __name__ == '__main__':
#     login()
try:
    i = 0
    # 开启线程数目
    tasks_number = 150
    print('测试启动')
    time1 = time.clock()
    while i < tasks_number:
        t = threading.Thread(target=login)
        t.start()
        i +=1
    time2 = time.clock()
    times = time2 - time1
    print(times/tasks_number)
except Exception as e:
    print(e)