code: def set_allow_float64(b):
      global _allow_float64
      _allow_float64 = b
  
file_path: tensorflow/tensorflow/python/ops/numpy_ops/np_dtypes.py
imports: import numpy
  from tensorflow.python.framework import dtypes
  from tensorflow.python.util import tf_export
label_desc: Use image node_id 4 for calling a global function with example usage: set_allow_float64(b) without return types