一次执行多个 Python 命令

Question

我想知道在 python 中同时执行两个或多个命令的最简单方法是什么。例如：

from turtle import *

turtle_one=Turtle()
turtle_two=Turtle()
turtle_two.left(180)
#The lines to be executed at the same time are below.
turtle_one.forward(100)
turtle_two.forward(100)

Answer 1

尝试使用线程模块。

from turtle import *
from threading import Thread

turtle_one=Turtle()
turtle_two=Turtle()
turtle_two.left(180)

Thread(target=turtle_one.forward, args=[100]).start()
Thread(target=turtle_two.forward, args=[100]).start()

这将在后台启动 turtle_one/two.forward 函数，参数为 100。

为了更简单，制作一个 run_in_background 函数...

def run_in_background(func, *args):
    Thread(target=func, args=args).start()

run_in_background(turtle_one.forward, 100)
run_in_background(turtle_two.forward, 100)

Answer 2

您可以使用 turtle 模块附带的计时器事件有效地执行此操作：

from turtle import Turtle, Screen

turtle_one = Turtle(shape="turtle")
turtle_one.setheading(30)
turtle_two = Turtle(shape="turtle")
turtle_two.setheading(210)

# The lines to be executed at the same time are below.
def move1():
    turtle_one.forward(5)

    if turtle_one.xcor() < 100:
        screen.ontimer(move1, 50)

def move2():
    turtle_two.forward(10)

    if turtle_two.xcor() > -100:
        screen.ontimer(move2, 100)

screen = Screen()

move1()
move2()

screen.exitonclick()

关于线程，正如其他人所建议的，阅读 post 中讨论的问题，例如，因为 Python 的 turtle 模块是建立在 Tkinter 上的最近 post 条记录：

a lot of GUI toolkits are not thread-safe, and tkinter is not an exception

一次执行多个 Python 命令

Executing multiple Python commands at once

python

turtle-graphics

python-3.x