python实现逐个读取txt字符并修改

import os
 
with open((os.path.join('test.txt')), 'r') as f:
	data=f.readlines()
	for line in data:
		odom=line.split()
		num=map(int,odom)
		lst=(list(num))
Len=len(lst)
 
for i in range(0,Len):
	if lst[i]==255:
		lst[i]=0
	elif lst[i]==0:
		lst[i]=1
print(lst)
 
with open((os.path.join('test_copy.txt')), 'w') as f:
	for j in range(0,Len):
		f.write(str(lst[j]))
		f.write(' ')