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HomeBackend DevelopmentPython TutorialHow Can I Capture Repeated Subpatterns in Python Regular Expressions?

How Can I Capture Repeated Subpatterns in Python Regular Expressions?

Capturing Repeated Subpatterns in Python Regular Expressions

When attempting to capture repeating subpatterns in Python regular expressions, users may encounter limitations. While the operator allows for the matching of one or more of a pattern, it captures only the final match. For example, in the case of capturing the subpattern (.w ) in an email address, using (.w ) will result in only the last occurrence (.tr) being captured.

To address this limitation, Python's re module does not support repeated captures like regex does. This means that the user cannot直接用正则表达式捕获重复的子模式.

As a solution, experts recommend splitting the repeated subpatterns after the initial match. This approach ensures simplicity and readability in the code. An example provided is where the domain part of an email address is split and the subdomains are then captured, as seen in @Li-aung Yip's answer.

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