[Python] In Python, how do I split a string and keep the separators?

Here's the simplest way to explain this. Here's what I'm using:

re.split('\W', 'foo/bar spam\neggs')
>>> ['foo', 'bar', 'spam', 'eggs']


Here's what I want:

someMethod('\W', 'foo/bar spam\neggs')
>>> ['foo', '/', 'bar', ' ', 'spam', '\n', 'eggs']


The reason is that I want to split a string into tokens, manipulate it, then put it back together again.

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