code: def argmin(x, axis=None):
      """Returns index which holds minimum of array elements over a given axis.
  
      Args:
          x (:class:`~chainer.Variable` or :ref:`ndarray`):
              Array to find minimum elements.
          axis (None or int): Axis over which a min is performed.
              The default (axis = None) is perform a min over all the dimensions
              of the input array.
      Returns:
          ~chainer.Variable: Output variable.
  
      """
      return ArgMin(axis).apply((x,))[0]
  
imports: import numpy
  import six
  from chainer import backend
  from chainer import function_node
  import chainer.functions
  import chainer.utils
  from chainer.utils import type_check
  import chainerx
label_desc: Use image node_id 4 for calling a global function with example usage: argmin(x, axis) and returns: ArgMin