import re def is_sri_lankan_phone_number(phone: str) -> bool: """ Determine whether the string is a valid sri lankan mobile phone number or not References: https://aye.sh/blog/sri-lankan-phone-number-regex >>> is_sri_lankan_phone_number("+94773283048") True >>> is_sri_lankan_phone_number("+9477-3283048") True >>> is_sri_lankan_phone_number("0718382399") True >>> is_sri_lankan_phone_number("0094702343221") True >>> is_sri_lankan_phone_number("075 3201568") True >>> is_sri_lankan_phone_number("07779209245") False >>> is_sri_lankan_phone_number("0957651234") False """ pattern = re.compile(r"^(?:0|94|\+94|0{2}94)7(0|1|2|4|5|6|7|8)(-| |)\d{7}$") return bool(re.search(pattern, phone)) if __name__ == "__main__": phone = "0094702343221" print(is_sri_lankan_phone_number(phone))