python - Python 中 elif 语句的语法错误...？

Question

每次运行此代码时，我都会遇到语法错误。我不明白为什么与我的脚本中的其他地方一样，我使用相同的结构并且工作正常。

我得到 elif 区域的语法错误 == 2: 第一行。然后，我收到一大堆缩进错误。我玩过缩进无济于事。希望有人能发现问题。

提前致谢。

def main():

back2main = "y"

while back2main == "y":

    print("Main Menu");print("1.)Highest Rainfall in one Day");print("2.)Wettest Location in Ireland");print("3.)Average Monthly Raindays");print("4.)[Construct Unique Query]");print("5.)Exit")
    choice = input("Please select one of options 1:5 above:")

    if choice == 1:

        print("1.)Cork");print("2.)Belfast");print("3.)Dublin");print("4.)Galway");print("5.)Limerick")
        region = input("Please enter a city from the numbered list above:")

        if region == 1:

            corkRain = open("CorkRainfall.txt","r")

            highestRain = 0.0

            for line in corkRain:
                data = line.split(" ")
                if float(data[3]) > highestRain:
                    highestRain = float(data[3])

        print("Highest rainfall in a single day for Cork: " + str(highestRain) + " mm")

        corkRain.close()

        back2main = raw_input("Return to Main Menu? (y/n):")

        elif region == 2:

            belfastRain = open("BelfastRainfall.txt","r")

            highestRain = 0.0

            for line in belfastRain:
                data = line.split(" ")
                if float(data[3]) > highestRain:
                    highestRain = float(data[3])

        print("Highest rainfall in a single day in Belfast: ") + str(highestRain)

Answer 1

elif block 必须与其上方的 if block 在同一垂直位置。这意味着 elif 下的所有代码，包括 elif 都应该向左移动一个 Tab。