Peng Yu wrote:
Hi,
Suppose that I have strings like the following
test(a b)a b
test(xy uv)xy uv
...
I want to change them to
test(a)a test(b)b
test(xy)xy test(uv)uv
...
The problem is that I don't know how to capture pattern that repeat
itself (like 'a' and 'xy' in the example). I could use 'test\((\w+)
(\w+)\)(\w) (\w)', but it will capture something like 'test(a b)x y',
which I don't want to.
I'm wondering if there is way to capture recurring patterns.
Use backreferences (it's in the documentation):
pattern = re.compile(r'test\((\w+) (\w+)\)\1 \2')
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