thread stomp?

[pyn3wb]

class1 (threading.Thread):
        def __init__(self, dir):
                self.dir = dir
                threading.Thread.__init__(self)
        
        def run(self):
                do stuff in dir here...

class2 (threading.Thread):
        def __init__(self, dir, dir2):
                self.file = g
                self.dir2 = dir2
                threading.Thread.__init__(self)

        def run(self):
                do stuff in dir here...
                output to dir2

class main
        for i in dircache.listdir(dir):
                //run over files
                class1(dir).start()

        for j in dircache.listdir(dir2):
                //run over files, dependent on stuff in dir
                class2(dir2).start()

think just using the loops above enough to prevent class2 threads from 
starting before class1 threads done

not true

class2 threads seems to start prior to class1 threads done; class2 
results depend on class1 finish first

any help?
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