Redo for loop iteration in Python

Question

Does Python have anything in the fashion of a \"redo\" statement that exists in some languages?

(The \"redo\" statement is a statement that (just like \"break\" or \

Answer 1

This is my solution using iterators:

class redo_iter(object):
    def __init__(self, iterable):
        self.__iterator = iter(iterable)
        self.__started = False
        self.__redo = False
        self.__last = None
        self.__redone = 0
    def __iter__(self):
        return self
    def redo(self):
        self.__redo = True
    @property
    def redone(self):
        return self.__redone
    def __next__(self):
        if not (self.__started and self.__redo):
            self.__started = True
            self.__redone = 0
            self.__last = next(self.__iterator)
        else:
            self.__redone += 1
        self.__redo = False
        return self.__last


# Display numbers 0-9.
# Display 0,3,6,9 doubled.
# After a series of equal numbers print --
iterator = redo_iter(range(10))
for i in iterator:
    print(i)
    if not iterator.redone and i % 3 == 0:
        iterator.redo()
        continue
    print('---')

• Needs explicit continue
• redone is an extra feature
• For Python2 use def next(self) instead of def __next__(self)
• requires iterator to be defined before the loop