5.2 将输出重定向到文件中
- 直接在print函数上加file参数即可
>>> with open('test.txt','wt') as f:
... print('write test',file=f)
...
>>> with open('test.txt','rt') as f:
... f.read()
...
'write test\n'
>>>
- 要确保文件是可写的,还有如果文件是以二进制模式打开的,print会失败
>>> with open('test.txt','wt') as f:
... print('write test',file=f)
...
>>> with open('test.txt','rt') as f:
... f.read()
...
'write test\n'
>>>
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