下载QQ群头像

import requests
import os
def download_pic():
    num=input('请输入一个群QQ号：').strip()
    r=url='https://qun.qq.com/cgi-bin/qun_mgr/search_group_members'
    headers={'cookie':'RK=AXM7O6tvGN; pgv_pvi=3061371904; pac_uid=1_1041192092; pgv_pvid=4191324976; o_cookie=1041192092; ptcz=f91291599716fbf7f446bf5aa57920f957b99e26341209ae6bfdea8beb9acc6a; pt2gguin=o1041192092; uin=o1041192092; pgv_si=s1943470080; pgv_info=ssid=s7204878420; rv2=80257F0A3C964F480BFD052DD4EEE39A4B75C6F61E98A74353; property20=1EB4AE24C4D9070FAEDA1B167DB641F7CCCDA1BDE85487093A4A267D2180C6B6222CAB50602D77CA; skey=@gIx9jhWic; ptisp=cnc; pt4_token=bCWOG8pXqFwE2uiuZqEz39RXtQPZbfLkhD9GKyvhCPA_; p_skey=xAZt07ZkFPhjUQRmBMsXdwWegf-YN4ZIBnD3kmXUKlw_; monitor_count=8; __guid=14431543.321282391317751500.1541491631598.9312; _qpsvr_localtk=0.5875996921107682; p_uin=o1041192092'}
    data = {'gc': num, 'st': '0','end':'70','sort':'0','bkn':'388269627'}
    r = requests.post(url, data=data,headers=headers)  # 发post请求
    #print(r.json())
    mems_msg=r.json().get('mems')
    for mem in mems_msg:
        #print(mem)
        if mem.get('card'):
            name=mem.get('card')
        else:
            name=mem.get('nick')
        #print(name)
        qq_num=mem.get('uin')
        #print(qq_num)

        url1='https://q4.qlogo.cn/g?b=qq&nk=%s&s=140'%qq_num
        r = requests.get(url1)
        f = open('%s.jpg'%(os.path.join(r'E:python20181026day8pictures',name)), 'wb')
        f.write(r.content)
        f.close()
download_pic()