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When called as a script with arguments, this compiles the directories
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force: if True, force compilation, even if timestamps are up-to-date
quiet: full output with False or 0, errors only with 1,
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r} z^ d } | d k r�| S| r�t d j | � � n t d d d �t | j j! d | � WYd d } ~ Xn X| d k r#d } | S)a Byte-compile one file.
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