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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 deploy_ext(self):
        '''
        Deploy the ext_mods tarball
        '''
        if self.mods.get('file'):
            self.shell.send(
                self.mods['file'],
                os.path.join(self.thin_dir, 'salt-ext_mods.tgz'),
            )
        return True