python - Python中的语法列表连接

Question

最pythonic的加入列表的方式是什么，以便每个项目之间有逗号，除了最后一个使用“and”的项目？

["foo"] --> "foo"
["foo","bar"] --> "foo and bar"
["foo","bar","baz"] --> "foo, bar and baz"
["foo","bar","baz","bah"] --> "foo, bar, baz and bah"

Answer 1

这个表达式做到了:

print ", ".join(data[:-2] + [" and ".join(data[-2:])])

如下所示:

>>> data
    ['foo', 'bar', 'baaz', 'bah']
>>> while data:
...     print ", ".join(data[:-2] + [" and ".join(data[-2:])])
...     data.pop()
...
foo, bar, baaz and bah
foo, bar and baaz
foo and bar
foo