python的庫requests教程

標籤：

requests是python的第三方庫，號稱：
Requests: HTTP for Humans
中文快速教程在這：http://cn.python-requests.org/zh_CN/latest/
看完之後有點迷惑，不知道怎麼用，看了一下源碼，發現
#官岡文檔中第一條就是
>>> r = requests.get(‘https://github.com/timeline.json‘)
>>> r = requests.put("http://httpbin.org/put")
>>> r = requests.delete("http://httpbin.org/delete")
>>> r = requests.head("http://httpbin.org/get")
>>> r = requests.options("http://httpbin.org/get")

#實際定義是（在api.py中）：
def request(method, url, **kwargs):
def get(url, **kwargs):
...code goes here...
return request(‘get‘, url, **kwargs):

其他幾個函數也是一樣的調用requests（）
其中requests函數的參數說明：

"""Constructs and sends a :class:`Request <Request>`.
Returns :class:`Response <Response>` object.

:param method: method for the new :class:`Request` object.
:param url: URL for the new :class:`Request` object.
:param params: (optional) Dictionary or bytes to be sent in the query string for the :class:`Request`.
:param data: (optional) Dictionary, bytes, or file-like object to send in the body of the :class:`Request`.
:param json: (optional) json data to send in the body of the :class:`Request`.
:param headers: (optional) Dictionary of HTTP Headers to send with the :class:`Request`.
:param cookies: (optional) Dict or CookieJar object to send with the :class:`Request`.
:param files: (optional) Dictionary of ``‘name‘: file-like-objects`` (or ``{‘name‘: (‘filename‘, fileobj)}``) for multipart encoding upload.
:param auth: (optional) Auth tuple to enable Basic/Digest/Custom HTTP Auth.
:param timeout: (optional) How long to wait for the server to send data before giving up, as a float, or a (`connect timeout, read timeout <user/advanced.html#timeouts>`_) tuple.
:type timeout: float or tuple
:param allow_redirects: (optional) Boolean. Set to True if POST/PUT/DELETE redirect following is allowed.
:type allow_redirects: bool
:param proxies: (optional) Dictionary mapping protocol to the URL of the proxy.
:param verify: (optional) if ``True``, the SSL cert will be verified. A CA_BUNDLE path can also be provided.
:param stream: (optional) if ``False``, the response content will be immediately downloaded.
:param cert: (optional) if String, path to ssl client cert file (.pem). If Tuple, (‘cert‘, ‘key‘) pair.

"""

requests函數使用了關鍵字參數（**kwargs）：關鍵字參數允許你傳入0個或任意個含參數名的參數，這些關鍵字參數在函數內部自動組裝為一個dict。 在Python中定義函數，可以用必選參數、預設參數、可變參數和關鍵字參數，這4種參數都可以一起使用，或者只用其中某些，但是請注意，參數定義的順序必須是：必選參數、預設參數、可變參數和關鍵字參數。

python的庫requests教程