Python中的语法列表联接

问题描述

除了列表中最后一个使用"and"的逗号之外，每个列表之间用逗号隔开的最Python方式是什么?

What's the most pythonic way of joining a list so that there are commas between each item, except for the last which uses "and"?

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

推荐答案

此表达式可以做到:

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

如此处所示:

>>> 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

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