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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def ResolveObject(self, document):
        '''Tries to locate a document in the archive.
        This function tries to locate the document inside the archive. It
        returns a tuple where the first element is zero if the function
        was successful, and the second is the UnitInfo for that document.
        The UnitInfo is used to retrieve the document contents
        '''
        if self.file:
            path = os.path.abspath(document)
            return chmlib.chm_resolve_object(self.file, path)
        else:
            return (1, None)