code: def mean(a, axis=None, dtype=None, out=None, keepdims=False):
      """Returns the arithmetic mean along an axis.
  
      Args:
          a (cupy.ndarray): Array to compute mean.
          axis (int, sequence of int or None): Along which axis to compute mean.
              The flattened array is used by default.
          dtype: Data type specifier.
          out (cupy.ndarray): Output array.
          keepdims (bool): If ``True``, the axis is remained as an axis of
              size one.
  
      Returns:
          cupy.ndarray: The mean of the input array along the axis.
  
      .. seealso:: :func:`numpy.mean`
  
      """
      # TODO(okuta): check type
      return a.mean(axis=axis, dtype=dtype, out=out, keepdims=keepdims)
  
file_path: cupy/cupy/_statistics/meanvar.py
imports: import functools
  import numpy
  import cupy
  from cupy._core import _routines_statistics
label_desc: Use image node_id 4 for calling a global function with example usage: mean(a, axis, dtype, out, keepdims) and returns: a