零基础入门学Python 课时29 文件:一个任务

黄金猫

动动手:
0.
lines = []

file_name = input('请输入文件名:')

print("请输入内容(单独输入':w'保存退出):")
words = input() + '\n'

while words != ':w\n':
    
    line = lines.append(words)
    words = input() + '\n'

f = open('/Users/yufan/Documents/python编程/29/29dds0/%s' % file_name,'x',encoding = 'GBK')
f.writelines(lines)
f.close()

1.
f1 = open('/Users/yufan/Documents/python编程/29/29dds1/余二娃',encoding = 'GBK')
f2 = open('/Users/yufan/Documents/python编程/29/29dds1/余三娃',encoding = 'GBK')

f1_string = []
f2_string = []
count = 0
wrong_line = []

for file_line in f1:
    f1_string.append(file_line)

for file_line in f2:
    f2_string.append(file_line)

small_len = len(f1_string) if len(f1_string) < len(f2_string) else len(f1_string)

for each_index in range(small_len):
    if f1_string[each_index] != f2_string[each_index]:
        count += 1
        wrong_line.append(count)
    else:
        count += 1

print('两个文件一共有%d处不同:' % len(wrong_line))
for each in wrong_line:
    print('第 %d 行不一样' % each)

f2.close()
f1.close()
2.
file_name = input('请输入你要打开的文件(/Users/yufan/Documents/python编程/29/29dds2)下:')
row = int(input('请输入需要显示该文件的前几行:'))

f = open('/Users/yufan/Documents/python编程/29/29dds2/%s' % file_name, encoding = 'GBK')

L = list(f)
n = 0
while n < row:
    print(L[n])
    n += 1

f.close()
3.
file_name = input('请输入你要打开的文件(/Users/yufan/Documents/python编程/29/29dds2)下:')
f = open('/Users/yufan/Documents/python编程/29/29dds2/%s' % file_name, encoding = 'GBK')
L = list(f)
string = []

(start,end) = input('请输入需要显示该文件的行数(例如 13:21 或 :21 或 21:):').split(':',1)

if start == '':
    start = 1
else:
    start = int(start)
        
if end == '':
    end = len(L)
else:
    end = int(end)
while True:
    if start > len(L) or start < 0 or end >len(L):
        print('你输入的数字超出最大范围,请重新输入!')
        (start,end) = input('请输入需要显示该文件的行数(例如 13:21 或 :21 或 21:):').split(':',1)
        if start == '':
            start = 1
        else:
            start = int(start)
        if end == '':
            end = len(L)
        else:
            end = int(end)
    else:
        break

n = start

while n <= end:
    string.append((L[n - 1]))
    n += 1

if start != 0 and end != 0:
    print('文件%s从第%d行到第%d行的内容如下:' % (file_name,start,end))
elif start == 1 and end != 0:
    print('文件%s从第开始到第%d行的内容如下:' % (file_name,end))
elif end ==len(string) and start != 1:
    print('文件%s从第%d行到末尾的内容如下:' % (file_name,start))
else:
    print('你在逗我,0到0行噢?')

for each_line in string:
    print(each_line)

f.close()