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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _cumprod(l):
 """Cumulative product of a list. Args: l: a list of integers Returns: a list with one more element (starting with 1) """

  ret = [1]
  for item in l:
    ret.append(ret[-1] * item)
  return ret