code: def _init_api(namespace, target_module_name=None):
      """Initialize api for a given module name
  
      namespace : str
         The namespace of the source registry
  
      target_module_name : str
         The target module name if different from namespace
      """
      target_module_name = (
          target_module_name if target_module_name else namespace
      )
      if namespace.startswith("mxnet."):
          _init_api_prefix(target_module_name, namespace[6:])
      else:
          _init_api_prefix(target_module_name, namespace)
  
file_path: mxnet/python/mxnet/_ffi/function.py
imports: import os
  import sys
  import ctypes
  from ..base import _LIB, check_call
  from .base import py_str, c_str
label_desc: Use image node_id 4 for calling a global function with example usage: _init_api(namespace, target_module_name) without return types