背景：
最近在学树莓派PICO的Micropython，买了一个流速计YF-S401，参考资料见链接，这里用C语言已经实现了，但是我对C语言不熟悉，想请大佬没根据这段代码，转化为树莓派PICO的Micropython能实现的脚本，请帮忙！！！

arduino ide样例代码（C语言实现代码）
（https://wiki.dfrobot.com.cn/_SKU_SEN0216__%E6%B0%B4%E6%B5%81%E9%87%8F%E8%AE%A1-1_8_）
```
/***************************************************
This example reads Water flow sensor Sensor.

Created 2016-3-13
By berinie Chen <bernie.chen@dfrobot.com>

GNU Lesser General Public License.
See <http://www.gnu.org/licenses/> for details.
All above must be included in any redistribution
****************************************************/

/***********Notice and Trouble shooting***************
1.Connection and Diagram can be found here http://wiki.dfrobot.com.cn/index.php?title=(SKU:SEN0216)_%E6%B0%B4%E6%B5%81%E9%87%8F%E8%AE%A1-1/8%E2%80%B3#.E6.8E.A5.E7.BA.BF.E5.9B.BE
2.This code is tested on Arduino Uno.
****************************************************/
volatile double waterFlow;
void setup() {‌‌‌
Serial.begin(9600); //baudrate
waterFlow = 0;
attachInterrupt(0, pulse, RISING); //DIGITAL Pin 2: Interrupt 0
}
void loop() {‌‌‌
Serial.print("waterFlow:");
Serial.print(waterFlow);
Serial.println(" L");
delay(500);
}

void pulse() //measure the quantity of square wave
{‌‌‌
waterFlow += 1.0 / 5880.0;
}
```