What are the differences in regex syntax between Python and JavaScript?

What are the differences in regex syntax between Python and JavaScript?

In Python, regex is handled by the re module, while JavaScript uses the built-in RegExp object. For instance, Python uses raw strings (prefixing with 'r') to avoid escaping backslashes, while JavaScript does not require this.

Can you give me an example of a regex pattern in both languages?

Sure! A simple pattern to match an email could look like this in Python: r'^[\w.-]+@[\w.-]+\.[a-zA-Z]{2,}$'. In JavaScript, it would be: /^[\w.-]+@[\w.-]+\.[a-zA-Z]{2,}$/.

Are there any specific flags that differ between the two?

Yes, Python has flags like re.IGNORECASE, while JavaScript uses the i flag directly in the regex, like /pattern/i.

What about capturing groups? Are they the same?

Capturing groups are similar in both, using parentheses (). However, Python allows named groups with (?P<name>...), while JavaScript uses (?<name>...).