import requests
import time

#爬取100次网页所需时间
def get_HTML_Text():
    i = 0
    while i < 100:
        try:
            r = requests.get(url)
            r.raise_for_status()
            r.encoding = r.apparent_encoding
            return r.status_code
        except:
            print("出现异常")

    i += 1


if __name__ == "__main__":
    time1 = time.time()
    url = "http://www.baidu.com"
    u = 0  # 记录爬取异常次数
    for i in range(100 + u):
        if get_HTML_Text() == 200:
            u = u
        else:
            u += 1
    time2 =time.time()
    print(f"爬取100次所需要的时间为{time2-time1}秒")