Python 读取多列csv数据绘曲线图

import pandas as pd
import matplotlib.pyplot as plt
from scipy.interpolate import spline
import numpy as np




if __name__ == '__main__':
    DT1 = np.array(pd.read_csv('D:/badagai/G/test.csv', usecols=['DT']))
    PE1 = np.array(pd.read_csv('D:/badagai/G/test.csv', usecols=['PE']))
    fig = plt.figure()
    fig.suptitle('Original signal', fontsize=14, fontweight='bold')
    ax = fig.add_subplot(1, 1, 1)
    ax.plot(DT1,PE1)
    ax.set_xlabel("DT")
    ax.set_ylabel("PE")
    plt.show()