Useful Python regular expressions

useful_regex.py

URL_REGEX = re.compile(r"^(http|https)://.+$")

IP_ADDRESS_V4_REGEX = re.compile(r"^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}"
                                 r"(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$")

US_ZIP_REGEX = re.compile(r"\d{5}(\-\d{4})?$")

UK_ZIP_REGEX = re.compile(r"^((GIR ?0AA)|((([A-PR-UWYZ][A-HK-Y]?[0-9][0-9]?)"
   r"|(([A-PR-UWYZ][0-9][A-HJKSTUW])"
   r"|([A-PR-UWYZ][A-HK-Y][0-9][ABEHMNPRV-Y]))) ?"
   r"[0-9][ABD-HJLNP-UW-Z]{2}))$")
   
CANADA_ZIP_REGEX = re.compile(r"^[ABCEGHJKLMNPRSTVXY]{1}\d{1}[A-Z]{1} *\d{1}[A-Z]{1}\d{1}$")

PHONE_NUM_REGEX = re.compile(r"^\(?\+?[\d\(\-\s\)]+$")

EMAIL_REGEX = re.compile(r"[^@]+@[^@]+\.[^@]+")

LANG_CODE_REGEX = re.compile(r"^[a-z]{2}(_[A-Z]{2})?$") # E.g., en_US or cn