importmatplotlib.pyplot as pltimportmatplotlib as mpl
mpl.rcParams["font.sans-serif"] = ["SimHei"]
mpl.rcParams["axes.unicode_minus"] =False
labels= "A難度水準", "B難度水準", "C難度水準", "D難度水準"students= [0.35, 0.15, 0.20, 0.30]
colors= ["#377eb8", "#4daf4a", "#984ea3", "#ff7f00"]
explode= (0.1, 0.1, 0.1, 0.1)
plt.pie(students, explode=explode, labels=labels, autopct="%3.1f%%",
startangle=45, shadow=True, colors=colors)
plt.title("選擇不同難度測試試卷的學生百分比")
plt.show()