[Tutor] How to open the closed file again?

[Kent Johnson]

> 2010/1/5 朱淳 <zhuchunml at gmail.com>:
>> Hi all,
>>     I put files in a list, just like this module:
>>
>> #! /usr/bin/python
>> # -*- coding=utf-8 -*-
>>
>>
>> fileList = []
>>
>> def openFiles():
>>     for i in range(0,2):
>>         fname = "file%s"%i
>>         f = open(fname,"a")
>>         fileList.append(f)
>>
>> def closeFiles():
>>     for f in fileList:
>>         f.close()
>>
>> if __name__=="__main__":
>>     openFiles()
>>     print "fileList
>>     closeFiles()
>>     print fileList
>>     openFiles()
>>     print fileList
>
> As others have explained, the problem is that you keep adding new file
> objects to fileList. I would make openFiles() return the list of files
> that it opened and pass that as a parameter to closeFiles():
>
> def openFiles():
>    fileList = []
>    for i in range(0,2):
>        fname = "file%s"%i
>        f = open(fname,"a")
>        fileList.append(f)
>    return fileList
>
> def closeFiles(fileList):
>    for f in fileList:
>        f.close()
>
> if __name__=="__main__":
>    fileList = openFiles()
>    print fileList
>    closeFiles(fileList)
>    print fileList
>    fileList = openFiles()
>    print fileList
>
> Kent
>