执行到后面就死循环了，这是怎么回事啊？

Question

#!/usr/bin/python
#Filename: bidui.py
#_*_coding:utf-8_*_
import glob, os, re ,os.path,datetime 
path_a = 'e:\\case\\' 
path_b = 'e:\\1\\'  
a_files = glob.glob('%s\\*' % path_a) 
b_files = glob.glob('%s\\*' % path_b)
flie3 = open('testresult.txt', 'a') # open for 'w'riting
for f in a_files:
file_name = os.path.basename(f) 
file_name_in_folder_b = re.subn(r'\d{8}_\d{2}_\d{2}_\d{2}_', '', file_name) 
full_path = '%s\\%s' % (path_b, file_name_in_folder_b)
full_patha = '%s\\%s' % (path_a, file_name)
print (file_name)
if full_path in b_files:
file_in_a = open(full_patha, 'r')
line2 = file_in_a.readline()
file_in_b = open(full_path, 'r')
line = file_in_b.readline()
while True:  
if len(line) == 0 and len(line2) == 0: 
break  
if line == line2:
flie3.write('pass')
else:
print ('failed')
flie3.write('fail')
file_in_a.close()
file_in_b.close()
flie3.close()
这是我写的一段文本比对程序 用了比对2个文件的内容的
结果循环到 if line == line2:
flie3.write('pass')

Answer 1

if len(line) == 0 and len(line2) == 0: break  ==>if len(line) == 0 or len(line2) == 0: break

Answer 2

你写了while True了一定是个死循环~至少每个分支后面和close后面要break吧