plt.bar画图

import numpy as np
import matplotlib.pyplot as plt
# 数据
x = np.arange(4)
Bj = [52, 55, 63, 53]
Sh = [44, 66, 55, 41]
bar_width = 0.3
# 绘图 x 表示 从那里开始
plt.bar(x, Bj, bar_width)
plt.bar(x+bar_width, Sh, bar_width, align="center")
# 展示图片
plt.show()

一张图上画两种bar

import numpy as np
import matplotlib.pyplot as plt
# 数据
x = np.arange(4)
Bj = [52, 55, 63, 53]
Sh = [44, 66, 55, 41]
bar_width = 0.3
# 绘图
plt.bar(x, Bj, bar_width)
plt.bar(x, Sh, bar_width, bottom=Bj)
# 展示图片
plt.show()

叠加型

"""
    默认的是竖值条形图
"""
import numpy as np
import matplotlib.pyplot as plt
import matplotlib
# 将全局的字体设置为黑体
matplotlib.rcParams['font.family'] = 'SimHei'
# 数据
N = 5
y = [20, 10, 30, 25, 15]
x = np.arange(N)
# 添加地名坐标
str1 = ("北京", "上海", "武汉", "深圳", "重庆")
# 绘图 x x轴， height 高度, 默认：color="blue", width=0.8
p1 = plt.bar(x, height=y, width=0.5, label="城市指标", tick_label=str1)
# 添加数据标签
for a, b in zip(x, y):
    plt.text(a, b + 0.05, '%.0f' % b, ha='center', va='bottom', fontsize=10)
# 添加图例
plt.legend()
# 展示图形
plt.show()

注意添加数据标签