code: def ddm_iadd(a: list[list[R]], b: Sequence[Sequence[R]]) -> None:
      """a += b"""
      for ai, bi in zip(a, b):
          for j, bij in enumerate(bi):
              ai[j] += bij
  
file_path: sympy/sympy/polys/matrices/dense.py
imports: from __future__ import annotations
  from operator import mul
  from .exceptions import DMShapeError, DMDomainError, DMNonInvertibleMatrixError, DMNonSquareMatrixError
  from typing import Sequence, TypeVar
  from sympy.polys.matrices._typing import RingElement
label_desc: Use image node_id 2 for calling a global function with example usage: ddm_iadd(a, b) without return types