python对比两个文件不同

pycharm 自带文件对比功能，右键选择compare with
def compare_file(file1,file2):
    f1 = open(file1,'r')
    f2 = open(file2,'r')
    count = 0
    diff = []
    for line1 in f1:
        line2 = f2.readline()
        count +=1
        if line1 != line2:
            diff.append(count)
    f1.close()
    f2.close()
    return diff
file1 = input('输入第一个文件：')
file2 = input('输入第二个文件：')
differ = compare_file(file1,file2)
if len(differ) == 0:
    print('两个文件一样')
else:
    print('两个文件共有%d处不同' % len(differ))
    for each in differ:
        print('第%d行不同' % each)