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  2. Python
  3. Closures and Decorators
  4. Standardize Mobile Number Using Decorators
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Standardize Mobile Number Using Decorators

  • munggudak
     + 0 comments
    def is_valid_phone(phone):
    return (len(phone) in range(10, 14) and
            phone[1:].isdigit())

def wrapper(f):
    def fun(l):
        if len(l) == 0 or not isinstance(l, list):
            raise ValueError("Input must be a non-empty list")
        
        invalid_numbers = [phone for phone in l if not is_valid_phone(phone)]
        if invalid_numbers:
            raise ValueError(f"Invalid phone numbers: {', '.join(invalid_numbers)}")
        
        return f(f"+91 {phone[-10:-5]} {phone[-5:]}" for phone in l)
    return fun