Python-matplotlib模块练习，柱状图的使用

import matplotlib.pyplot as plt
import numpy as np

def test4():
    names = ['电影1', '电影2', '电影3']
    real_num1 = [7548, 4013, 1673]
    real_num2 = [5453, 1840, 1080]
    real_num3 = [4348, 2345, 1890]
    x = np.arange(len(names))
    # 绘制柱形图
    width = 0.3
    plt.bar(x, real_num1, alpha=0.5, width=width, label=names[0])
    plt.bar([i+width for i in x], real_num2, alpha=0.5, width=width, label=names[1])
    plt.bar([i+2*width for i in x], real_num3, alpha=0.5, width=width, label=names[2])
    # 正常显示中文
    plt.rcParams["font.sans-serif"] = ["SimHei"]
    # 设置x坐标轴的值
    x_label = ["第{}天".format(i+1) for i in x]
    # 让x坐标轴显示在中间
    plt.xticks([i+width for i in x], x_label)
    # 添加ylabel
    plt.ylabel("票房数")
    # 添加图例
    plt.legend()
    # 添加标题
    plt.title("3天3部电影票房数")
    plt.show()

test4()

 结果显示: