import numpy as np
import os
f = open("train.txt")
while True:
line = f.readline() #包括换行符
line = line[:-1] #去掉换行符
if line:
print (line)
else:
break
f.close()

import numpy as np
import os
f = open("train.txt")
while True:
line = f.readline() #包括换行符
line = line[:-1] #去掉换行符
if line:
print (line)
else:
break
f.close()