调用help函数，可以看到一个函数或者方法的字符串文档。
In [1]: import requests In [2]: help(requests.get) Help on function get in module requests.api: get(url, params=None, **kwargs)Sends a GET request.: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 \*\*kwargs: Optional arguments that ``request`` takes.:return: :class:`Response <Response>` object:rtype: requests.Response
使用dir可以查看模块或对象都有哪些方法。
In [3]: dir(requests) Out[3]: ['ConnectionError','HTTPError','compat','cookies','delete','exceptions','get','head','hooks',...
使用ipython+?查看
In [4]: requests.get? Type: function String form: <function get at 0x10e6c35f0> File: /Library/Python/2.7/site-packages/requests/api.py Definition: requests.get(url, params=None, **kwargs) Docstring: Sends a GET request. :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 \*\*kwargs: Optional arguments that ``request`` takes. :return: :class:`Response <Response>` object :rtype: requests.Response
使用pydoc查看字符串文档
python -m pydoc requests
Help on package requests:
NAMErequests
FILE/Library/Python/2.7/site-packages/requests/__init__.py
DESCRIPTIONrequests HTTP library Requests is an HTTP library, written in Python, for human beings. Basic GETusage:>>> import requests>>> r = requests.get('https://www.python.org')>>> r.status_code200>>> 'Python is a programming language' in r.contentTrue
