code: def _powm1(x, y, *, evaluate=True):
      return Add(
          Pow(x, y, evaluate=evaluate), -S.One, evaluate=evaluate
      )
  
file_path: sympy/sympy/codegen/scipy_nodes.py
imports: from sympy.core.function import Add, ArgumentIndexError, Function
  from sympy.core.power import Pow
  from sympy.core.singleton import S
  from sympy.functions.elementary.exponential import log
  from sympy.functions.elementary.trigonometric import cos, sin
label_desc: Use image node_id 2 for calling a global function with example usage: _powm1(x, y) and returns: Add