'''导入有关模块'''
import numpy as np
from scipy.stats import t
import matplotlib as mpl
import matplotlib.pyplot as plt
x=np.linspace(-4,4,300)
y=t.pdf(x,1)
plt.plot(x,y)
plt.axis((-5,5,0,0.35))#设置图中显示的x、y的坐标范围
plt.xticks([-3,-2,-1,0,1,2,3],[' ','-t',' ','0',' ',' t',' '])#替换新的下标
'''添加注释，注释内容，箭头位置坐标，第一个文字的位置坐标,箭头颜色，箭头宽度'''
plt.annotate('p/2',xy=(2.5,0.05),xytext=(3.5,0.08),arrowprops=dict(facecolor='black',headwidth=8))
plt.annotate('p/2',xy=(-2.5,0.05),xytext=(-3.9,0.08),arrowprops=dict(facecolor='black',headwidth=8))
'''区域颜色填充，填充区域，填充颜色，颜色深浅'''
plt.fill_between(x,y,where=(x<-2),facecolor='b',interpolate=True,alpha=0.3)
plt.fill_between(x,y,where=(x>2),facecolor='b',interpolate=True,alpha=0.3)
plt.show()
运行后的结果如下：
