code: def _call_func_bc(nargs, idx, ops, keys):
      """
      Implements transformation of CALL_FUNCTION bc inst to Rapids expression.
      The implementation follows definition of behavior defined in
      https://docs.python.org/3/library/dis.html#opcode-CALL_FUNCTION
  
      :param nargs: number of arguments including keyword and positional arguments
      :param idx: index of current instruction on the stack
      :param ops: stack of instructions
      :param keys:  names of instructions
      :return: ExprNode representing method call
      """
      kwargs, idx, nargs = _read_explicit_keyword_args(
          nargs, idx, ops, keys
      )
      args, idx, nargs = _read_explicit_positional_args(
          nargs, idx, ops, keys
      )
      return _to_rapids_expr(idx, ops, keys, *args, **kwargs)
  
imports: from h2o.utils.compatibility import *
  import dis
  import inspect
  import sys
  from .None import h2o
  from .expr import ExprNode, ASTId
label_desc: Use image node_id 38 for calling a global function with example usage: _call_func_bc(nargs, idx, ops, keys) and returns: _to_rapids_expr