引领

初始化 Led 类

使用以下构造函数创建 LED：

Led(port)

此构造函数使用一个参数：

范围	描述
port	LED 连接到的 3 线端口，无论它是 大脑 上的端口，还是 3 线扩展器 上的端口。

必须先创建 Brain 或 3-Wire Expander，然后才能使用 LED 类构造函数创建对象。

# Create the Brain.
brain = Brain()
# Construct an LED "led" with the Led class.
led = Led(brain.three_wire_port.a)

This led object will be used in all subsequent examples throughout this API documentation when referring to Led class methods.

类方法

on()

The on() method turns the LED on.

**返回：**无

# Turn on the LED.
led1.on()

# Wait 2 seconds.
wait(2, SECONDS)

# Turn off LED.
led1.off()

off()

The off() method turns the LED off.

**返回：**无

# Turn on the LED.
led1.on()

# Wait 2 seconds.
wait(2, SECONDS)

# Turn off LED.
led1.off()