python全代码如下 import re import csv import matplotlib.pyplot as plt x=[] y=[] m=eval(input()) #输入折线条数 for i in range(m): y.append([]) fo = open(E:\\shu\\2.txt, r, encoding='UTF-8') plt.ylim(0, 20) # 设定y轴范围 for line in fo.readlines(): # 按行输入 lin