Instead of break or continue, allow to do "redo". Kind-of.

redo.py

def redoable(iterable): 
    do_redo = False 
    def redo():
        nonlocal do_redo 
        do_redo = True 
    for item in iterable: 
        yield redo, item 
        while do_redo: 
            do_redo = False 
            yield redo, item

usage.py

>>> import random
>>> for redo, i in redoable(range(10)):
...    print(i)
...    if random.random() > 0.8:
...        redo()
...
0
1
2
3
4
5
5
5
6
6
7
8
9
>>>