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�d	����Z�d�S(
���i����(���t���sleepNi����i���s���from . import dbg�������?i����gn��!	@c���������O���s����t��}�|�j�d�d���}�d�|�k�r.�|�d�=n��x��t�r��y�|��|�|����SWq1�t�j�k
�r��t�ru�t�j�d�|���n��t�|���|�d�9}�|�t�k�r��t�}�n��|�d�8}�|�d�k�r�����q��q1�Xq1�Wd�S(���s?��DeadlockWrap(function, *_args, **_kwargs) - automatically retries
    function in case of a database deadlock.

This is a function intended to be used to wrap database calls such
    that they perform retrys with exponentially backing off sleeps in
    between when a DBLockDeadlockError exception is raised.

A 'max_retries' parameter may optionally be passed to prevent it
    from retrying forever (in which case the exception will be reraised).

d = DB(...)
        d.open(...)
        DeadlockWrap(d.put, "foo", data="bar")  # set key "foo" to "bar"
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