Python Regular Expressions

Question

Does anybody know/explain what the following python regular expressions match?
r'\

Answer 1

I will try to answer by adding some cases.

r"\lt;\d+>[/*]?" matchs:
lt;
continuous with one and more digit
then, >
zero or one / or *

Example:
lt;1>
lt;2>/
lt;007>*

r"\$\$|\${\w+}" matchs:

1st Alternative \$\$:
$

2nd Alternative \${\w+}:
${
[a-zA-Z0-9_] one or more times
}

Example:
$
${iOS_11}

You might also want to check out this online regex tester, https://regex101.com

Hope this helps.

Answer 2

Esch
Thank you very much. It makes much more sense now.