text: if __name__ == "__main__":
      seasons = ['Spring', 'Summer', 'Fall', 'Winter']
      print(list(enumerate(seasons)))
      #[(0, 'Spring'), (1, 'Summer'), (2, 'Fall'), (3, 'Winter')]
      print(list(enumerate(seasons, start=1)))
      # 下标从 1 开始 [(1, 'Spring'), (2, 'Summer'), (3, 'Fall'), (4, 'Winter')]
  
      seq = ['one', 'two', 'three']
      for i, element in enumerate(seq):
          print(i, element)