code: def _everyN(el, n):
      """Group the list el into groups of size n"""
      if len(el) % n != 0:
          raise ValueError(el)
      for i in range(0, len(el), n):
          yield el[i : i + n]
  
imports: from fontTools.cffLib import maxStackLimit
label_desc: Use image node_id 6 for calling a global function with example usage: _everyN(el, n) without return types