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This class manages a MultiIndex by mapping label combinations to positive
integers.
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Transform combination(s) of uint64 in one uint64 (each), in a strictly
monotonic way (i.e. respecting the lexicographic order of integer
combinations): see BaseMultiIndexCodesEngine documentation.
Parameters
----------
codes : 1- or 2-dimensional array of dtype uint64
Combinations of integers (one per row)
Returns
-------
scalar or 1-dimensional array, of dtype uint64
Integer(s) representing one combination (each).
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This class manages those (extreme) cases in which the number of possible
label combinations overflows the 64 bits integers, and uses an ObjectEngine
containing Python integers.
c �� � |j d� | j z }|j dk( rt j j |� S t j j |d�� S )a
Transform combination(s) of uint64 in one Python integer (each), in a
strictly monotonic way (i.e. respecting the lexicographic order of
integer combinations): see BaseMultiIndexCodesEngine documentation.
Parameters
----------
codes : 1- or 2-dimensional array of dtype uint64
Combinations of integers (one per row)
Returns
-------
int, or 1-dimensional array of dtype object
Integer(s) representing one combination (each).
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