为什么我的列表索引超出范围？

Question

def main(): 
    print("You haved activated Weather Pro 3.0") 
    rain_inputs() 
    rain_calc() 

def rain_inputs(): 
    global rain 
    rain = [] 
    for x in range(1, 13): 
     try: 
      rain_meter = float(input("What is the rainfall? ")) 
      rain.append(rain_meter) 
      if x == 4: 
       print("8 more months to go!") 
      elif x == 7: 
       print("5 more months to go!") 
      elif x == 9: 
       print("2 more to go! Smash those keys!") 
      elif x == 13: 
       return 
     except Exception as err: 
      err = ("You should be putting in numbers!") 
      print(err) 

rain_calc应该计算所有列出的输入的总数。在rain-math3发生

def rain_calc(): 
    rain_math =(rain[0] + rain[1] + rain[2] + rain[3]) 
    rain_math2 =(rain[5] + rain[6] + rain[7] + rain[8]) 
    rain_math3 =(rain[9] + rain[10] + rain[11] + rain[12]) 
    rain_total =(rain_math + rain_math2 + rain_math3) 
    print(rain_total) 

main() 

错误：

Programming/RainFall.py", line 30,   in rain_calc rain_math3 =(rain[9] + rain[10] + rain[11] + rain[12]) 
IndexError: list index out of range 

Answer 1

rain[12]超出范围，因为只有rain中有12个元素。你错过了rain[4]，所以你可能想要这个：

def rain_calc(): 
    rain_math =(rain[0] + rain[1] + rain[2] + rain[3]) 
    rain_math2 =(rain[4] + rain[5] + rain[6] + rain[7]) 
    rain_math3 =(rain[8] + rain[9] + rain[10] + rain[11]) 
    rain_total =(rain_math + rain_math2 + rain_math3) 
    print(rain_total)