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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 update_machine_state(state_path):
 """Update the machine state using the provided state declaration."""

    charmhelpers.contrib.templating.contexts.juju_state_to_yaml(
        salt_grains_path)
    subprocess.check_call([
        'salt-call',
        '--local',
        'state.template',
        state_path,
    ])