Method push

Python/Turtle.py:831–837

(self, item)

            self.buffer = [[None]] * bufsize
        self.ptr = -1
    def push(self, item):
        if self.bufsize > 0:
            if not self.cumulate:
                self.ptr = (self.ptr + 1) % self.bufsize
                self.buffer[self.ptr] = item
            else:
                self.buffer[self.ptr].append(item)
    def pop(self):
        if self.bufsize > 0:
            item = self.buffer[self.ptr]