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Guess the "Content-Type" of a file.
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The filename to guess the "Content-Type" of using :mod:`mimetypes`.
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Helper function to format and quote a single header parameter.
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non-ASCII values, like file names. This follows RFC 2231, as
suggested by RFC 2388 Section 4.4.
:param name:
The name of the parameter, a string expected to be ASCII only.
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The value of the parameter, provided as a unicode string.
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A data container for request body parameters.
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The name of this request field.
:param data:
The data/value body.
:param filename:
An optional filename of the request field.
:param headers:
An optional dict-like object of headers to initially use for the field.
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�__init__? s zRequestField.__init__c C s^ t |t�r4t|�dkr"|\}}}q@|\}}t|�}nd}d}|}| |||d�}|j|d� |S )a�
A :class:`~urllib3.fields.RequestField` factory from old-style tuple parameters.
Supports constructing :class:`~urllib3.fields.RequestField` from
parameter of key/value strings AND key/filetuple. A filetuple is a
(filename, data, MIME type) tuple where the MIME type is optional.
For example::
'foo': 'bar',
'fakefile': ('foofile.txt', 'contents of foofile'),
'realfile': ('barfile.txt', open('realfile').read()),
'typedfile': ('bazfile.bin', open('bazfile').read(), 'image/jpeg'),
'nonamefile': 'contents of nonamefile field',
Field names and filenames must be unicode.
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