Python 遍历文件查找不同

<span style="font-size:18px;">import os

arr1 = []
path = '.\\'
def fun(dir,arr):
i = 0
j = 0
for t in os.listdir(dir):
t1 = os.path.join(dir,t)
if os.path.isfile(t1):
arr.append((t,t1))
elif os.path.isdir(t1):
fun(t1,arr)
f = open('.\\result.txt','w')
fun(path,arr1)
arr1.sort()
for i in range(0,len(arr1)-1):
if arr1[i][0] != os.path.basename(__file__) and arr1[i][0] != 'result.txt':
print('{0:-<50}'.format(arr1[i][0]),arr1[i][1],file = f)
f.close()
print('over!')</span>