i hate lowercase hex

import os
import re

pattern = r"\b0x([a-f0-9]*[a-f][a-f0-9]*\b)"

for dirpath, dirnames, filenames in os.walk("./include/"):
    for filename in filenames:
        path = dirpath + "/" + filename
        with open(path, "r") as inputFile:
            data = inputFile.read()

        newData = data
        for match in re.finditer(pattern, data):
            newData = newData.replace("0x" + match.group(1), "0x" + match.group(1).upper())

        with open(path, "w") as outputFile:
            outputFile.write(newData)