gen.py

def print_all_sets():
    n = 3

    g = Gen()
    while not g.done():
        print([g.gen(1) == 1 for _ in range(3)])

class Gen:
    def __init__(self):
        self.v = []
        self.p = 0
        self.started = False

    def done(self):
        if not self.started:
            self.started = True
            return False
        for i in reversed(range(len(self.v))):
            if self.v[i][0] < self.v[i][1]:
                self.v[i][0] += 1
                del self.v[i+1:]
                self.p = 0
                return False
        return True

    def gen(self, bound):
        if self.p == len(self.v):
            self.v.append([0, 0])
        self.v[self.p][1] = bound
        res = self.v[self.p][0]
        self.p += 1
        return res

if __name__ == "__main__":
    print_all_sets()