import matplotlib as mpl
import matplotlib.pyplot as plt

# 防止乱码
mpl.rcParams["font.sans-serif"] = ["SimHei"]
mpl.rcParams["axes.unicode_minus"] = False

labels = "A难度水平","B难度水平","C难度水平","D难度水平"

students = [0.35,0.15,0.20,0.30]
colors = ["#377eb8","#4daf4a","#984ea3","#ff7f00"]

explode = (0.1,0.1,0.1,0.1)

# 绘制图形
plt.pie(students,explode=explode,
        labels = labels,
        autopct="%3.1f%%",
        startangle=45,
        shadow=True,
        colors=colors)

plt.title("选择不同难度测试试卷的学生占比")

plt.show()

在这里插入图片描述

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