Data store solution need help

[Haulyn Jason]

Hi, all:

I am a Java programmer, now I am working on a Python program. At the 
moment, I need to store some data from user's input, no database, no 
xml, no txt(we can not make users open the data file by vim or other 
text editor).

Any suggestions or reference url? Is there a lib should do this or I 
need to implement it myself?

PS: if I want to implement it myself, which part of python document I 
need to learn? I know how to write txt files now, but not further for me.

-- 
Thanks!

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Haulyn Jason