python matplotlib从文件中读取数据绘制折线图

说明：从文件中读取数据，绘制直线图

#coding:utf-8import matplotlib.pyplot as pltimport matplotlib as mplimport numpy as npfrom matplotlib.font_manager import FontPropertiesimport matplotlib as mplmpl.rcParams['font.family'] = 'sans-serif'mpl.rcParams['font.sans-serif'] = 'NSimSun,Times New Roman'x, y = np.loadtxt('难度30.txt', delimiter=',', unpack=True)plt.plot(x,y,label='难度值为30',color='black')plt.plot(x,y,'o',color='black')plt.xlabel('XXXX')plt.ylabel('XXXX')plt.title(u'XXXXXX')plt.legend()plt.show()

结果：