python requests庫基本使用介紹

requests是用python語言基於urllib編寫的，採用的是apache2 licensed開源協議的http庫。與urllib相比，requests更加方便，可以節約我們大量的工作，建議爬蟲使用requests庫。

1. 發起基本get請求並傳入引數

import requests

defget_html
(url)
:# 這個傳入的引數是拼接在url中的一組引數
param =
html = requests.get(url,params=param)
if html.status_code ==
200:
html.encoding=
"utf8"
print
(html.text)
else
:print
("error"
,html)
if __name__ ==
'__main__'
: url =
""get_html(url)

# post傳送表單

import requests
defpost_html
(url)
: data =
html = requests.post(url, data=data)
if html.status_code ==
200:
html.encoding =
"utf8"
print
(html.text)
else
:print
("get error:"
+ html.url)
if __name__ ==
'__main__'
: url =
""post_html(url)

# 獲取json資料

post_url(url)

# 使用session維持會話，減少頻繁發起請求

post_url(url)

# 忽略https證書驗證

import requests
defget_url
(url)
: html = requests.get(url,verify=
false
)if html.status_code ==
200:
print
("ok"
)else
:print
("error:"
+ url)
if __name__ ==
'__main__'
: url =
""get_url(url)

# 使用ip**

import requests
proxies =
defget_url
(url)
: html = requests.get(url, proxies=proxies, timeout=
3,verify=
false
)if html.status_code ==
200:
print
("ok"
)else
:print
("get error:"
+ url)
if __name__ ==
'__main__'
: url =
""get_url(url)

# post上傳檔案

import requests
file=)
}def
post_html
(url)
: html = requests.post(url, files=
file
)if html.status_code ==
200:
html.encoding =
"utf8"
print
(html.text)
else
:print
("get error:"
+ html.url)
if __name__ ==
'__main__'
: url =
""post_html(url)

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