Python如何读取txt文件,获取指定行中指定位置数据

#-*- coding: utf-8 -*-
"""
@Date:   2020/5/21 21:53
@Author: Pangpd

@FileName: read_log.py
@IDE: PyCharm
@Description: 获取日志中的训练精度和损失
"""
import linecache


#获取指定行内容
def get_line(file, nums_line):
    return linecache.getline(file, nums_line).strip()


file = 'D:/UseTools/OneDrive/codes/My-Research/logs/05-01_10-09-40/05-01_10-09-40.txt'
train_accuracy_list = []
train_loss_list = []
for line in range(17, 217):
    current_context = get_line(file, line).split()
    train_accuracy = float(current_context[9])
    train_loss = float(current_context[6])
    train_accuracy_list.append(train_accuracy)
    train_loss_list.append(train_loss)

0   0
1   1
2   4
3   9
4   16
5   25
6   36

X, Y = [], []
for line in open('my_data.txt', 'r'):
    values = [float(s) for s in line.split()]
    X.append(values[0])
    Y.append(values[1])
plt.plot(X, Y)  #二维数据是折线图，一维数据就是柱状图
plt.show()

import matplotlib.pyplot as plt
import numpy as np

data = np.loadtxt('test1.txt')

plt.plot(data[:,0],data[:,1])
plt.show()