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r{ t | t � r^ t | � } n | j | � } d | | f SXd } t j | � r� d } n t j d | � } d | | | | f Sn | S( u� The inverse of parseaddr(), this takes a 2-tuple of the form
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returned unmodified.
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returns a date relative to the local timezone instead of UTC, properly
taking daylight savings time into account.
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an ascii string, not numeric one (so "GMT" instead of "+0000"). This
is needed for HTTP, and is only used when localtime==False.
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If usegmt is True, dt must be an aware datetime with an offset of zero. In
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presume initially that summer time (for example, Daylight Saving Time)
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