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Index.get_loc(key, method=None, tolerance=None)[source]

Get integer location for requested label.


key : label

method : {None, ‘pad’/’ffill’, ‘backfill’/’bfill’, ‘nearest’}, optional

  • default: exact matches only.
  • pad / ffill: find the PREVIOUS index value if no exact match.
  • backfill / bfill: use NEXT index value if no exact match
  • nearest: use the NEAREST index value if no exact match. Tied distances are broken by preferring the larger index value.

tolerance : optional

Maximum distance from index value for inexact matches. The value of the index at the matching location most satisfy the equation abs(index[loc] - key) <= tolerance.

New in version 0.17.0.


loc : int if unique index, possibly slice or mask if not

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