排除以特定字符开头的列表元素的最pythonic方法是什么？

Question

I have a list of strings. I want to get a new list that excludes elements starting with '#' while preserving the order. What is the most pythonic way to this? (preferably not using a loop?)

Answer 1

[x for x in my_list if not x.startswith('#')]

That's the most pythonic way of doing it. Any way of doing this will end up using a loop in either Python or C.

Answer 2

Not using a loop? There is filter builtin:

filter(lambda s: not s.startswith('#'), somestrings)

Note that in Python 3 it returns iterable, not a list, and so you may have to wrap it with list() .