match case in micropython – SyntaxError: invalid syntax

Question

I am using python 3.10.5 on my raspberry pi pico and I am trying to use match & case instead of if statements When I try to run the program it returns an error:

Traceback (most recent call last):
  File "<stdin>", line 22
SyntaxError: invalid syntax

Here is my function:

async def BlueTooth(delay):
    while True:
        if uart.any():
            command = uart.readline()
            #print(command)   # uncomment this line to see the received data
            match command:
                case b'1':
                    led.value(1)
                case b'0':
                    led.value(0)
            write_i2c("cmd: {}n{}".format(command, Commands.get_command_action(str(command))))

        await asyncio.sleep(delay)

I have checked, and everything should be normal, what can cause the problem?
BTW, I am using Thonny as my editor.

Asked By: David

||

Source

Answer 1

According to micropython’s README.md:

MicroPython implements the entire Python 3.4 syntax (including exceptions, with, yield from, etc., and additionally async/await keywords from Python 3.5 and some select features from later versions).

match/case are new as of Python 3.10, six releases after the last version of the Python language spec MicroPython claims full support for. And it’s a ridiculously complex addition to the language (relying on a complete replacement of the simpler LL(1) parser with a more flexible/powerful/complex PEG parser among other things). They don’t support it yet, but it’s on their todo list. When it’s supported, the "MicroPython differences from CPython » Python 3.10" docs should be updated to indicate that support is completed.

Answered By: ShadowRanger

match case in micropython – SyntaxError: invalid syntax

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