from?http?import?cookiejar
from?urllib?import?request
url?=?"http://www.baidu.com"

print("第一種方法")
response1?=?request.urlopen(url)
resp1?=?response1.read()
print(response1.getcode())
print(len(resp1))
print(resp1)

print("第二種方法")
req?=?request.Request(url)
req.add_header("user-agent",?"Mozilla/5.0")
response2?=?request.urlopen(req)
print(response2.getcode())
resp2?=?response2.read()
print(len(resp2))
print(resp2.decode("utf-8"))

print("第三種方法")
cj?=?cookiejar.CookieJar()
opener?=?request.build_opener(request.HTTPCookieProcessor(cj))
request.install_opener(opener)
response3?=?request.urlopen(url)
print(response3.getcode())
print(len(response3.read()))
print(cj)
print(response3.read().decode("utf-8"))

http?cookiejar
urllib?request
url?=?()
response1?=?request.urlopen(url)
resp1?=?response1.read()
(response1.getcode())
((resp1))
(resp1)

()
req?=?request.Request(url)
req.add_header()
response2?=?request.urlopen(req)
(response2.getcode())
resp2?=?response2.read()
((resp2))
(resp2.decode())

()
cj?=?cookiejar.CookieJar()
opener?=?request.build_opener(request.HTTPCookieProcessor(cj))
request.install_opener(opener)
response3?=?request.urlopen(url)
(response3.getcode())
((response3.read()))
(cj)
(response3.read().decode())

第三種方法為什么把前面的覆蓋了，也沒出現內容啊

resp2?=?response2.read()
((resp2))
(resp2.decode())

這樣就可以了

我也是這樣

需要把 len()去掉，打印 response3.read() 的內容，而不是長度