W3School TIY Editor

# 这三行代码使编译器能够绘图：

import sys

import matplotlib

matplotlib.use('Agg')

​

import matplotlib.pyplot as plt

​

# 数据点坐标和类别标签：

x = [4, 5, 10, 4, 3, 11, 14, 8, 10, 12]

y = [21, 19, 24, 17, 16, 25, 24, 22, 21, 21]

classes = [0, 0, 1, 0, 0, 1, 1, 0, 1, 1]

​

# 绘制散点图（按类别着色）：

plt.scatter(x, y, c=classes)

plt.show()

​

# 这两行代码使编译器能够输出图形：

plt.savefig(sys.stdout.buffer)

sys.stdout.flush()