code: def rotate_l(L, k):
      """
      Rotates left by k. L is a row of a matrix or a list.
  
      """
      ll = list(L)
      if ll == []:
          return []
      for i in range(k):
          el = ll.pop(0)
          ll.insert(len(ll) - 1, el)
      return ll if isinstance(L, list) else Matrix([ll])
  
imports: from sympy.concrete.summations import summation
  from sympy.core.function import expand
  from sympy.core.numbers import nan
  from sympy.core.singleton import S
  from sympy.core.symbol import Dummy
  from sympy.functions.elementary.complexes import Abs, sign
  from sympy.functions.elementary.integers import floor
  from sympy.matrices.dense import eye, Matrix, zeros
  from sympy.printing.pretty.pretty import pretty_print
  from sympy.simplify.simplify import simplify
  from sympy.polys.domains import QQ
  from sympy.polys.polytools import degree, LC, Poly, pquo, quo, prem, rem
  from sympy.polys.polyerrors import PolynomialError
label_desc: Use image node_id 31 for calling a global function with example usage: rotate_l(L, k) and returns: unknown, list