cPickling and variable scope problem

[Cere Davis]

Using Python2.2

I've got a piece of code that goes something like this:

import sys,os,cPickle

def getData():
    data["x"]="y"

def stash():
    ouf=open("stuff",'wb')
    cPickle.dump(data,ouf)
    ouf.close()

def unstash():
    inf=open("stuff",'rb')
    data=cPickle.load(inf)
    inf.close()

def main():
    global data
    data={}
    if os.path.exists("stuff"):
        unstash()
        print data.keys()
        print data.values()
        sys.exit(0)
    getData()
    stash()


if __name__ == '__main__':
    main()


But I don't get any output for the data.keys() or data.values() from 
"main".  Can someone tell me what's wrong here?
Perhaps obvious, but I am not seeing the problem.....

Thanks,
-Cere