python - matching all characters in any order in regex

Question

I'm a regex newbie, but I understand how to match any characters in a regex query in order (ex. [abc] will match any of a, b or c. Also, I believe "abc" will match abc exactly).

However, how do I construct a regex query that will match all the characters abc in any order? So for example, I want it to match "cab" or "bracket". I'm using Python as my scripting language (not sure if this matters or not).

Answer 1

In Python, I wouldn't use a regualar expression for this purpose, but rather a set:

>>> chars = set("abc")
>>> chars.issubset("bracket")
True
>>> chars.issubset("fish")
False
>>> chars.issubset("bad")
False

Regular expressions are useful, but there are situations where different tools are more appropriate.