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r" c C sB t j | � d d � } | d k r> | j t j d | � � S| S)aS Encode a byte string using Base64.
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b2a_base64� translate�bytes� maketrans)r �altchars�encodedr r r! r 3 s Fc C sz t | � } | d k rB t | � } | j t j | d � � } n | rm t j d | � rm t j d � � n t j | � S)a Decode a Base64 encoded byte string.
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)r )r r r r! r d s s +/s -_c C s t | � j t � S)z�Encode a byte string using a url-safe Base64 alphabet.
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)r r' �_urlsafe_encode_translation)r r r r! r r s c C s% t | � } | j t � } t | � S)aX Decode a byte string encoded with the standard Base64 alphabet.
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s ABCDEFGHIJKLMNOPQRSTUVWXYZ234567c s� t d k rA d d � t D� � � f d d � � D� a d � n t | t � se t | � j � } n t | � d } | r� | t d | � } n t � } t j
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letter O (oh), and for optional mapping of the digit 1 (one) to
either the letter I (eye) or letter L (el). The optional argument
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s c C sR t | � } | r! | j � } n t j d | � rE t j d � � n t j | � S)a� Decode a Base16 encoded byte string.
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foldspacesr r! r4 0 s z _85encode.<locals>.<listcomp>r# r_ r r8 � r$ r$ r$ r$ ) r r r r rF �struct�StructZunpack�join) r6 rb rc �padrd re �paddingZwords�chunksr )rb rc rd re r! � _85encode& s &
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j | � � n | r� t 7� n � S)a Encode a byte string using Ascii85.
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zAAscii85 encoded byte sequences must be bracketed by {!r} and {!r}r> z!I� ur? � !r r8 ra rp zAscii85 overflowNr_ zz inside Ascii85 5-tuples r` zy inside Ascii85 5-tuples zNon-Ascii85 digit found: %crf rR s uuuurp �u �z �y )r" �
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