爬虫请求超时

f1 = open('wen.txt','r')
print(f1.read(3))
#　文件指针用于表明文件读取的其实位置， 文件指针表明了文件将要从那个位置开始读写

#tell() 函数 返回文件指针的位置
print(f1.tell())
'''
    seek() 函数用于将文件的指针移动到指定的位置
'''
'''
    split() 函数 
'''
str1 = open('wen.txt')
print(str1.read())
str1.seek(0)
print(str1.tell())
str2 = "hell boy<[www.bai.=du.com]byebye>"
print(str2.split('[')[1].split([']'][0]))

f2 = open('wenjian1.txt')
with open('wenjian1.txt','r',encoding='utf-8') as f:
    m = f.readlines()
    for i in m:
        print(i)

请求超时

import requests
# 循环发送请求50次
for a in range(50):
    try:
        response = requests.get('https://www.baidu.com/', timeout=0.1)
        print(response.status_code)
    except Exception as e:

        print('异常'+str(e))

import requests
# 导入request.exceptions 模块类的3种异类
from requests.exceptions import ReadTimeout,HTTPError,RequestException
# 循环发送请求50次
for a in range(50):
    try:
        response = requests.get('https://www.baidu.com/', timeout=0.1)
        print(response.status_code)
    except ReadTimeout:
        print('timeout, 请求超时')
    except HTTPError:
        print('httperror， HTTP异常')
    except RequestException:
        print('reqerror， 请求异常')