我有以下几点:
>>> myString = "has spaces"
>>> first, second = myString.split()
>>> myString = "doesNotHaveSpaces"
>>> first, second = myString.split()
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ValueError: need more than 1 value to unpack
如果字符串没有任何空格，我希望将second默认为None.我目前有以下内容，但我想知道是否可以在一行中完成:
splitted = myString.split(maxsplit=1)
first = splitted[0]
second = splitted[1:] or None
我建议你考虑使用一种不同的方法，即partition而不是split:
>>> myString = "has spaces"
>>> left, separator, right = myString.partition(' ')
>>> left
'has'
>>> myString = "doesNotHaveSpaces"
>>> left, separator, right = myString.partition(' ')
>>> left
'doesNotHaveSpaces'
如果您使用的是python3，则可以使用以下选项:
>>> myString = "doesNotHaveSpaces"
>>> first, *rest = myString.split()
>>> first
'doesNotHaveSpaces'
>>> rest
[]