每次迭代后如何清空列表？

Question

在这里，我允许将数字作为字符串输入，然后将其转换为列表，最后我再次将 x 和 y 设置为空列表，但它使用每次迭代的数据值输出图形这样图形输出就有 3 条不同的线，而不是只有一条。

import matplotlib as mpl
import matplotlib.pyplot as plt
import os

xyz = int(input("How many graphs would you like to create? "))
n=1

for i in range(xyz):
    x = input("Enter a your x variables, starting from the smallest with a space between each: ")
    x=x.split() #takes the input and turns it into a list
    print(x)
    y = input("Enter a your y variables, starting from the smallest with a space between each: ")
    y=y.split()

    plt.plot(x,y)
    plt.savefig("Desktop/python/graph"+str(n)+".png")
    x = []
    y = []
    n=n+1

Answer 1

您正在绘制同一个图形。用plt.clf()清除图形。