a quick check for a pattern?

[luoheng]

You can use re to do the pattern search. Here is a example:

import re
pattern = re.compile(r"^(\d+)x(\d+)(?:\+(\d+))?(?:\+(\d+))?$")
test = "700x400+400+200"
m = pattern.match(test)
print(m.groups())
// ('700', '400', '400', '200')