比如有这样的函数：
def hello():
    print "Hello."

怎样才能在程序中获取这个函数的输出内容呢？
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在输出的同时，log一份到log文件

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你是不是想要
def hello():
    return "Hello."


2006/2/27, recordus <recordus at gmail.com>:
>
> 比如有这样的函数：
> def hello():
>     print "Hello."
>
> 怎样才能在程序中获取这个函数的输出内容呢？
>
> _______________________________________________
> python-chinese
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> Unsubscribe: send unsubscribe to  python-chinese-request at lists.python.cn
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>
>


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On 2/27/06, recordus <recordus at gmail.com> wrote:
> 比如有这样的函数：
> def hello():
>     print "Hello."
>
> 怎样才能在程序中获取这个函数的输出内容呢？

最简单的是把 print 改为 return 。别外hack的方式就是把标准输出重定向到你的文件对象中：

def hello():
    print 'hello'

import sys
import StringIO

buf = StringIO.StringIO()
old = sys.stdout  #保存旧的
sys.stdout = buf  #替换成你的
hello()                 #输出，但看不到，因为输出到buf中去了
sys.stdout = old  #恢复
print "out=", buf.getvalue()  #再次输出

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On 2/27/06, limodou <limodou at gmail.com> wrote:
> 最简单的是把 print 改为 return 。别外hack的方式就是把标准输出重定向到你的文件对象中：
>
> def hello():
>    print 'hello'
>
> import sys
> import StringIO
>
> buf = StringIO.StringIO()
> old = sys.stdout  #保存旧的
> sys.stdout = buf  #替换成你的
> hello()                 #输出，但看不到，因为输出到buf中去了
> sys.stdout = old  #恢复
> print "out=", buf.getvalue()  #再次输出

可以写成"@"方式的:)

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Best Regards,
mep

怎么写?

2006/2/27, mep <kebowang at gmail.com>:
>
> On 2/27/06, limodou <limodou at gmail.com> wrote:
> > 最简单的是把 print 改为 return 。别外hack的方式就是把标准输出重定向到你的文件对象中：
> >
> > def hello():
> >    print 'hello'
> >
> > import sys
> > import StringIO
> >
> > buf = StringIO.StringIO()
> > old = sys.stdout  #保存旧的
> > sys.stdout = buf  #替换成你的
> > hello()                 #输出，但看不到，因为输出到buf中去了
> > sys.stdout = old  #恢复
> > print "out=", buf.getvalue()  #再次输出
>
> 可以写成"@"方式的:)
>
> --
> Best Regards,
> mep
>
> _______________________________________________
> python-chinese
> Post: send python-chinese at lists.python.cn
> Subscribe: send subscribe to python-chinese-request at lists.python.cn
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On 2/27/06, ajax chelsea <ajaxchelsea at gmail.com> wrote:
> 怎么写?


import sys
import StringIO

buf = StringIO.StringIO()

def redirector(g):
    def func(*args, **kwargs):
        old = sys.stdout
        global buf
        sys.stdout = buf
        try:
            return g(*args, **kwargs)
        finally:
            sys.stdout = old
    return func

@redirector
def hello():
    print 'hello'

hello()
print "out=", buf.getvalue()

有点简陋

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Best Regards,
mep