| 123456789101112131415161718192021 |
- try:
- import os
- import io
- except ImportError:
- exit(0)
- a = open('123.txt', 'wt')
- a.write('123')
- a.write('456')
- a.close()
- with open('123.txt', 'rt') as f:
- assert f.read() == '123456'
- with open('123.txt', 'a') as f:
- f.write('测试')
- with open('123.txt', 'r') as f:
- assert f.read() == '123456' + '测试'
- os.remove('123.txt')
|
