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- 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')
- # default mode is 'r'
- with open('123.txt') as f:
- assert f.read() == '123456' + '测试'
- assert os.path.exists('123.txt')
- os.remove('123.txt')
- assert not os.path.exists('123.txt')
- with open('123.bin', 'wb') as f:
- f.write('123'.encode())
- f.write('测试'.encode())
- def f():
- with open('123.bin', 'rb') as f:
- b = f.read()
- assert isinstance(b, bytes)
- assert b == '123测试'.encode()
- f()
- assert os.path.exists('123.bin')
- os.remove('123.bin')
- assert not os.path.exists('123.bin')
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