如果你只关心尾随的换行符，你可以这样做:

If you are concerned only with the trailing newline, you can do:

a.rstrip().split('\n')

参见 str.lstrip() 和 str.strip() 以了解变化.

See, str.lstrip() and str.strip() for variations.

如果您更普遍地担心多余的换行符会产生空项目，您可以这样做:

If you are more generally concerned by superfluous newlines producing empty items, you can do:

filter(None, a.split('\n'))