一些有用的编程参数说明

本篇内容主要讲解"一些有用的编程参数说明"，感兴趣的朋友不妨来看看。本文介绍的方法操作简单快捷，实用性强。下面就让小编来带大家学习"一些有用的编程参数说明"吧!

def request(method, url, **kwargs):    """Constructs and sends a :class:`Request `.    :param method: method for the new :class:`Request` object.    method用于将要创建的类Requet的参数,get,post之类.    :param url: URL for the new :class:`Request` object.    传入Request的URL参数,即访问的网页,一般需要带有完整的协议,而不是简单的域名.    :param params: (optional) Dictionary, list of tuples or bytes to send        in the body of the :class:`Request`.    字典类型或者是tuple集合或者byte类型    params是参数，也就是  ?key=value&key=value&...    也就是链接后面的.    也可以通过 [(key,value)] 也可以是直接按照http协议编码好的数据    :param data: (optional) Dictionary, list of tuples, bytes, or file-like        object to send in the body of the :class:`Request`.    data 字典类型或者是tuple集合或者byte类型或者是一个文件一样的类     一般是表单中的数据.    :param json: (optional) A JSON serializable Python object to send in the body of the         :class:`Request`.    对应调试程序中的 request payload    json，序列化发送过去的数据    :param headers: (optional) Dictionary of HTTP Headers to send with the     :class:`Request`.    请求头，包括许多的格式和标准还有参数信息等等。字典或者http Headers    :param cookies: (optional) Dict or CookieJar object to send with the     :class:`Request`.    cookies可以放入headers中也可以手动添加。可以是字典，cookiejar对象    :param files: (optional) Dictionary of ``'name': file-like-objects`` (or ``{'name':     file-tuple}``) for multipart encoding upload.    字典或者多个传输模块的方式。        ``file-tuple`` can be a 2-tuple ``('filename', fileobj)``, 3-tuple ``('filename',     fileobj, 'content_type')``    file-tuple可以是两个元素或者是三个元素的元组，或者是四个元素的元组        or a 4-tuple ``('filename', fileobj, 'content_type', custom_headers)``, where     ``'content-type'`` is a string        defining the content type of the given file and ``custom_headers`` a dict-like      object containing additional headers        to add for the file.    :param auth: (optional) Auth tuple to enable Basic/Digest/Custom HTTP Auth.    授权    :param timeout: (optional) How many seconds to wait for the server to send data        before giving up, as a float, or a :ref:`(connect timeout, read        timeout) ` tuple.    :type timeout: float or tuple    设置超时，等待服务器多少秒后就放弃发送。可以是float或者是一个元组，分别是连接和响应超时时长    :param allow_redirects: (optional) Boolean. Enable/disable     GET/OPTIONS/POST/PUT/PATCH/DELETE/HEAD redirection. Defaults to ``True``.    :type allow_redirects: bool     传入一个bool值，表示是否允许重定向。    :param proxies: (optional) Dictionary mapping protocol to the URL of the proxy.    代理，可以设置多个代理。    :param verify: (optional) Either a boolean, in which case it controls whether we     verify            the server's TLS certificate, or a string, in which case it must be a path            to a CA bundle to use. Defaults to ``True``.    如果是一个bool值就是控制是否给证书，如果是一个字符串就是整数存放的位置。默认是True。    空的证书可能会失败.一般用于访问`https`报证书错误,同下面的 cert    :param stream: (optional) if ``False``, the response content will be immediately     downloaded.    是按照stream还是直接下载，默认是直接下载，如果我们下载文件，视频什么的可以通过流下载。    我们可以看一下you-get,当资源太多的时候,就可以用流的形式一点点的读取.    :param cert: (optional) if String, path to ssl client cert file (.pem). If Tuple,     ('cert', 'key') pair.    声明授权文件,一般用于https访问,比如说报错 certificate verify failed: unable to get local issuer certificate    :return: :class:`Response ` object    :rtype: requests.Response    Usage::      >>> import requests      >>> req = requests.request('GET', 'https://httpbin.org/get')          """     # By using the 'with' statement we are sure the session is closed, thus we    # avoid leaving sockets open which can trigger a ResourceWarning in some    # cases, and look like a memory leak in others.    # 通过with模式我们可以保证session会被关闭。避免离开sockets导致了错误，比如其他地方内存益处。    with sessions.Session() as session:        return session.request(method=method, url=url, **kwargs)

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