1. 绝对路径1

import pandas as pd
import numpy as np
path = 'C:\\Users\\pxf\\Desktop\\train.tsv'
data = pd.read_csv(path,header=None,names=['类别','特征'])

2.绝对路径2

import pandas as pd
import numpy as np
path = 'C:/Users/pxf/Desktop/train.tsv'
data = pd.read_csv(path,header=None,names=['类别','特征'])

.tsv文件使用pycharm自带的plugins就可以打开
txt文件也是一样的读取方法

3.相对路径的方式，如图：