fname = input(‘请输入文件名：‘)
file = open(fname,‘x‘)
print(‘请输入内容【单独输入\‘:w\‘保存退出】：‘)
while 1:
    content = input()
    if content == ‘:w‘:
        break
    else:
        
        file.write(‘%s\n‘%content)
file.close()

f1_name = input(‘请输入需要比较的第一个文件名：‘)
f2_name = input(‘请输入需要比较的第二个文件名：‘)

file1 = open(f1_name)
file2 = open(f2_name)

count = 0    #定义行数
differ = []  #记录行数

for line1 in file1:
    line2 = file2.readline()
    count += 1
    if line1 != line2:
        differ.append(count)

file1.close()
file2.close()

if len(differ) == 0:
    print(‘两个文件完全一样！‘)
else:
    print(‘两个文件共%d行不同‘%len(differ))
    for line in differ:
        print(‘第%d行不一样‘%line)

def compare(f1_name,f2_name):   #给带参且有返回值
    file1 = open(f1_name)
    file2 = open(f2_name)

    row = 0     #记录哪一行
    count = 0   #记录一共几处错误

    for (line1,line2) in zip(file1,file2):
        row += 1
        if line1 != line2:
            index = 0
            for (char1,char2) in zip(line1,line2):
                index += 1        
                if char1 != char2:
                    print(‘第%d行第%d列不一样‘%(row,index))
                    count += 1
    file1.close()
    file2.close()
    return count

f1_name = input(‘请输入需要比较的第一个文件名：‘)
f2_name = input(‘请输入需要比较的第二个文件名：‘)

count = compare(f1_name,f2_name)

if count == 0:
    print(‘两个文件完全一样！‘)
else:
    print(‘两个文件共%d处不同‘%count)

===================================
请输入需要比较的第一个文件名：file1.txt
请输入需要比较的第二个文件名：file3.txt
两个文件完全一样！
===================================
请输入需要比较的第一个文件名：file1.txt
请输入需要比较的第二个文件名：file2.txt
第1行第5列不一样
第1行第6列不一样
第3行第1列不一样

def readline(file_name,start,end):
    file = open(file_name)
    print(‘第%d行到第%d内容为：‘%(start,end))
    for row in range(end):
        print(row)
        a = file.readline()
        if start-1 <= row < end:
            print(a,end=‘‘)
        else:
            continue
    file.close()
    
file_name = input(‘请输入文件名：‘)
s_e = input(‘请指定输出行数(形如a:b)：‘)
while s_e == ‘‘:
    s_e = input(‘输入有误，请重新输入：‘)
(start,end) = s_e.split(‘:‘)
if start == ‘‘:
    start = 1
else:
    start = int(start)
if end == ‘‘:
    end = -1
else:
    end = int(end)
print(start)
print(end)


readline(file_name,start,end)