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  • 打印print的另一种方式sys.stdout

    >>> import sys
    >>> tmp = sys.stdout
    >>> sys.stdout=open('log.txt','a')
    >>> print('cisco')
    >>> print(1,2,3)
    >>> sys.stdout.close()
    >>> sys.stdout=tmp
    >>> print('haha')
    haha
    >>> print(open('log.txt','rb').read())
    b'welcome to haha
    cisco
    1 2 3
    '
    >>> print(open('log.txt','r').read())
    welcome to haha
    cisco
    1 2 3
    
    >>> 
    

      tmp作用是保存当前的sys.stdout,修改了sys.stdout后能找回之前的sys.stdout,来让print能输出到屏幕

    如果想用print实现把打印的内容导出到文件:

    >>> x,y,z='haha',88,['python','ericsson']
    >>> x
    'haha'
    >>> y
    88
    >>> z
    ['python', 'ericsson']
    >>> print(x,y,z,sep='...!', file=open('data.txt','w'))
    >>> print(x,y,z)
    haha 88 ['python', 'ericsson']
    >>> file.close()
    >>> print(open('data.txt','r').read())
    haha...!88...!['python', 'ericsson']
    

      在该目录下,会生成一个data.txt文件

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  • 原文地址:https://www.cnblogs.com/vigossr/p/11176008.html
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