What's different between Python and Javascript regular expressions?

Question

Are Python and JavaScript regular expression syntax identical?

If not, then:

1. What are the important differences between them
2. Is there a pyth

Answer 1

There is a comparison table here:

Regex Flavor Comparison

Answer 2

Part 1
They are different; One difference is Python supports Unicode and Javascript doesn't.

Part 2
Read Mastering Regular Expressions. It gives information on how to identify the back-end engines (DFA vs NFA vs Hybrid) that a regex flavour uses. It gives tons of information on the different regex flavours out there.

There is way too much information to convey on a single SO answer, so you're better off having a solid piece of reference material on the subject.

Answer 3

http://www.regular-expressions.info/javascript.html vs http://www.regular-expressions.info/python.html