code: def _max_norm(x):
      return np.amax(abs(x))
  
imports: import sys
  import copy
  import heapq
  import collections
  import functools
  import numpy
  from scipy._lib._util import MapWrapper, _FunctionWrapper
label_desc: Use image node_id 1 for calling a global function with example usage: _max_norm(x) and returns: np