python3如何看文档

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

In [3]: dir(requests)

Out[3]:

['ConnectionError',

 'HTTPError',

 'compat',

 'cookies',

 'delete',

 'exceptions',

 'get',

 'head',

 'hooks',

  ...

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

~  python -m pydoc requests

Help on package requests:

NAME

    requests

FILE

    /Library/Python/2.7/site-packages/requests/__init__.py

DESCRIPTION

    requests HTTP library

    Requests is an HTTP library, written in Python, for human beings. Basic GET

    usage:

       >>> import requests

       >>> r = requests.get('https://www.python.org')

       >>> r.status_code

       200

       >>> 'Python is a programming language' in r.content

       True