01-知识笔记(pandas画柱状图往柱状图上添加具体数字)

柱状图上添加数字

import pandas as pd
import numpy as np
import matplotlib.pyplot as plt
# 解决图表汉字乱码问题
plt.rcParams['font.sans-serif'] = ['SimHei']  
# 解决图表负号显示不正确问题
plt.rcParams['axes.unicode_minus'] = False
width = 0.3
num_list = dfs['每个柱子对应的数值'].tolist()
index = np.arange(len(num_list))
plt.bar(index, num_list, width, color='steelblue', tick_label=name_list, label='对应数值')
for a, b in zip(index, num_list):
    plt.text(a, b '%d'%b, ha='center', va='bottom',fontsize=7)
plt.legend()
plt.savefig('处理结果图.png')
plt.show()