Question

我是编程新手，并尝试从automatetheboringstuff.com学习Python。在第2章末尾，出现了以下问题。即使在我通过官方答复之后，我仍然无能为力。请帮忙！

问：8。确定此代码中的三个块：

spam = 0
if spam == 10:
    print('eggs')
    if spam > 5:
        print('bacon')
    else:
        print('ham')
    print('spam')
print('spam')

官方回答：

这三个块是if语句和行内的所有内容 print('bacon')和print('ham')。
print('eggs')
if spam > 5:
    print('bacon')
else:
    print('ham')
print('spam')

Answer 1

每次增加一行的缩进时都会开始一个新块，并在相应的unindent之前结束。

spam = 0
if spam == 10:
    print('eggs')        # indent increased, block A
    if spam > 5:         # still block A
        print('bacon')   # still block A, indent increased, block B inside block A
    else:                # still block A, indent decreased, block B ended in line above
        print('ham')     # still block A, indent increased, block C inside block A
    print('spam')        # still block A, indent decreased, block C ended in line above
print('spam')            # indent decreased, block A ended in line above

Python中的“阻止”是什么意思？

1 个答案: