def convertToInteger(stringID):
  id = [0, 1, 2, 3, 4, 5, 6]

stringId = '0123456'
[int(x) for x in stringId]
=> [0, 1, 2, 3, 4, 5, 6]

map(int, stringId)
=> [1, 2, 3, 4, 5, 6]