解决Pycharm调用Turtle时 窗口一闪而过的问题

如下所示：

#彩色螺旋线
import turtle
turtle.pensize(2)
turtle.bgcolor("black")
colors = ["red","yellow","purple","blue"]
turtle.tracer(False)
for x in range(400):
 turtle.forward(2*x)
 turtle.color(colors[x % 4])
 turtle.left(91)
turtle.tracer(True)

在用pycharm调用Turtle画图时，上面的代码显示一闪而过

最后加上一句turtle.done()即可解决

'''
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'''
#彩色螺旋线
import turtle
turtle.pensize(2)
turtle.bgcolor("black")
colors = ["red","yellow","purple","blue"]
turtle.tracer(False)
for x in range(400):
 turtle.forward(2*x)
 turtle.color(colors[x % 4])
 turtle.left(91)
turtle.tracer(True)
turtle.done()

效果如下：