@staticmethod
def is_e164_number(number):
    'Simple check if number is in E.164 format'
    if (isinstance(number, str) and RE_E164.match(number)):
        return True
    return False
Simple check if number is in E.164 format
@staticmethod
def is_e164_number(number):
    
    if (isinstance(number, str) and RE_E164.match(number)):
        return True
    return False