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mZddlmZddlmZmZdZdZdZdZdZejd�Zejd�Z d�Z!d�Z"d �Z#d!�Z$d"�Z%ejd#ej&ej'B�Z(de*e*d$�Z+dd%�Z,d&�Zd'�Zd(�Z-d)�Z.d*�Z/ddd+�Z0ejd,�Z1d-�Z2d.d/d0�Z3dS(1sMiscellaneous utilities.tcollapse_rfc2231_valuet
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|Stj|�S(s�Decodes a base64 string.

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  (?P<encoding>[qb])    # either a "q" or a "b", case insensitive
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ddddg|d|dddddddddddddg|d d |d|d!|d"|d#|fS(%s�Returns a date string as specified by RFC 2822, e.g.:

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    Optional localtime is a flag that when True, interprets timeval, and
    returns a date relative to the local timezone instead of UTC, properly
    taking daylight savings time into account.

    Optional argument usegmt means that the timezone is written out as
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