Decorator to retry a function if it fails

retry.py

def retry(tries):
    def decorator(fn):
        @functools.wraps(fn)
        def wrapper(*args, **kwargs):
            ex = None
            for i in range(tries):
                try:
                    result = fn(*args, **kwargs)
                except Exception as e:
                    print("Failed...")
                    ex = e
                    pass
                else:
                    return result
            raise ex
        return wrapper
    return decorator
  
if __name__ == '__main__':
    import random
    
    @retry(3)
    def faily(chance):
        if random.random() > chance:
            return True
        raise RuntimeError
    
    faily(0.5)