Question

求代码:将file1.txt文件的内容按行逆序输出到file2.txt文件中 用Python

如:
file1中是
123
456
789
file2中是
789
456
123

Answer 1

open('2','w').writelines(open('1').readlines()[::-1])

Answer 2

fo=open('file2.txt','w')
f= open('file1.txt')
data=f.readline()
fo.writeline(data[::-1])
fo.close()
f.close()

Answer 3

open('file2.txt','w').writelines(open('file1.txt').readlines()[::-1])