python - 列表索引超出范围(使用 while 循环)

Question

我正在为 edx 类(class)做作业，当它运行 while 循环时，我的代码中出现“索引超出范围”错误，即使它最终给出了正确的输出。

这是我的代码:

# [] create The Weather
# [] copy and paste in edX assignment page
!curl https://raw.githubusercontent.com/MicrosoftLearning/intropython/master/world_temp_mean.csv -o mean_temp.txt

mean_temp = open('mean_temp.txt', 'a+')
mean_temp.write("Rio de Janeiro,Brazil,30.0,18.0\n")

mean_temp.seek(0)

headings = mean_temp.readline().split(',')

city_temp = mean_temp.readline().split(',')
while city_temp:
    print(headings[0].capitalize(), "of", city_temp[0], headings[2], "is", city_temp[2], "Celsius")
    city_temp = mean_temp.readline().split(',')

mean_temp.close()

Answer 1

我已经对此进行了测试，它应该可以工作。我认为你的 while 子句没有正确找到文件的末尾 - for 循环可以工作并且更干净。

with open("mean_temp.txt", "a") as f:
    f.write("\nRio de Janeiro,Brazil,30.0,18.0")

with open("mean_temp.txt", "r") as f:
    headings = f.readline().split(',')
    for next_line in f:
        next_line = next_line.split(',')
        print(headings[0].capitalize(), "of", next_line[0], headings[2], "is", next_line[2], "Celsius")