import re
str = "?CNTN_CD=A0002400127&PAGE_CD=ET00_1&BLCK_NO=1&CMPT_CD=T0016&TEXT=한글패러미터"
pattern = re.compile(r"[\u0000-\u007F]+")
result = pattern.search(str)
print(result.group(0))
aW1wb3J0IHJlCnN0ciA9ICI/Q05UTl9DRD1BMDAwMjQwMDEyNyZQQUdFX0NEPUVUMDBfMSZCTENLX05PPTEmQ01QVF9DRD1UMDAxNiZURVhUPe2VnOq4gO2MqOufrOuvuO2EsCIKcGF0dGVybiA9IHJlLmNvbXBpbGUociJbXHUwMDAwLVx1MDA3Rl0rIikKcmVzdWx0ID0gcGF0dGVybi5zZWFyY2goc3RyKQpwcmludChyZXN1bHQuZ3JvdXAoMCkp