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dd�Zdd� Zdd� Zd S ) �Lexera� Parse `code` lines and yield "classified" tokens.
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tokennames -- either 'long', 'short', or '' (see below).
Merge subsequent tokens of the same token-type.
Iterating over an instance yields the tokens as ``(tokentype, value)``
tuples. The value of `tokennames` configures the naming of the tokentype:
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�__init__/ s zLexer.__init__c c st t |�}t|�\}}x6|D ].\}}||kr4||7 }q||fV || }}qW |jd�rb|dd� }|rp||fV dS )zrMerge subsequent tokens of same token-type.
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