izip_longest 被重命名 为 zip_longest 在 Python 3 中(注意，开头没有 i)，改为导入:

izip_longest was renamed to zip_longest in Python 3 (note, no i at the start), import that instead:

from itertools import zip_longest

并在您的代码中使用该名称.

and use that name in your code.

如果您需要编写同时适用于 Python 2 和 3 的代码，请捕获 ImportError 以尝试其他名称，然后重命名:

If you need to write code that works both on Python 2 and 3, catch the ImportError to try the other name, then rename:

try:
    # Python 3
    from itertools import zip_longest
except ImportError:
    # Python 2
    from itertools import izip_longest as zip_longest

# use the name zip_longest