爬虫学习，第一课就被卡死了，找不到问题所在

lanjl

代码
import urllib.request
req==urllib.request.Request('http://placekitten.com/800/800')
response=urllib.request.urlopen(req)

cat_img=response.read()

with open('cat_800_800.img','wb') as f:
    f.write(cat_img)





问题===
Traceback (most recent call last):
  File "G:/网站爬虫8.2.py", line 2, in <module>
    req==urllib.request.Request('http://placekitten.com/800/800')
NameError: name 'req' is not defined

Markpython

req==urllib.request.Request('http://placekitten.com/800/800') 把red==ur..这里的双等号改为单等号试试

临时号

req==urllib.request.Request('http://placekitten.com/800/800')这里写了两个==,改成一个=
还有,图片文件的后缀名不是img,改成png

import urllib.request
req=urllib.request.Request('http://placekitten.com/800/800')
response=urllib.request.urlopen(req)

cat_img=response.read()

with open('cat_800_800.png','wb') as f:
    f.write(cat_img)

w.py

req==urllib.request.Request('http://placekitten.com/800/800')

这里把双等号改成单等号试试怎么样

w.py

应该是这样吧

import urllib.request
req = urllib.request.Request('http://placekitten.com/800/800')
response = urllib.request.urlopen(req)


cat_jpg = response.read()

with open('cat_800_800.jpg','wb') as f:
    f.write(cat_jpg)

ll.pc

双等于是真的等于，单等于是附值

python0729

学到了