a quick check for a pattern?

[Skaperen]

a string might fit the pattern of a window geometry like "700x400" or "700x400+100+100". what is a nice quick way to test if it does and get the numbers from it? the pattern is not valid if what is between the 'x' and '+' characters is not a string representing a number.

[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')

[Skaperen]

i could not have come up with that. i expected someone would suggest "re". thanks for including the regex.

[Skaperen]

what would be the pattern for just "700x400" by itself? i don't understand those question marks so i don't know if i need them. a string lacking digits before or after the "x" need to not match.