code: def get_current_context():
      """
      Get the current context.
  
      It can be set using :meth:`nnabla.context_scope` or :meth:`nnabla.set_default_context` .
  
      Returns:
          Context: a current context.
  
      """
      global current_ctx
      return current_ctx
  
imports: from __future__ import absolute_import
  from contextlib import contextmanager
  from .variable import Context
label_desc: Use image node_id 3 for calling a global function with example usage: get_current_context() and returns: current_ctx