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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 exit_dfu():
 """Exit DFU mode, and start running the program."""


    # set jump address
    set_address(0x08000000)

    # Send DNLOAD with 0 length to exit DFU
    __dev.ctrl_transfer(0x21, __DFU_DNLOAD, 0, __DFU_INTERFACE,
                        None, __TIMEOUT)

    try:
        # Execute last command
        if get_status() != __DFU_STATE_DFU_MANIFEST:
            print("Failed to reset device")

        # Release device
        usb.util.dispose_resources(__dev)
    except:
        pass