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*ry c C sJ |d kr t | d�r| j}nd}|dkr.t| �S |dkr>t| �S td��d S )N�moder* )�rr* )�wrz z$mode must be 'r', 'rb', 'w', or 'wb')�hasattrr� r( ry r �r3 r� r r r r. s
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