Python 3.10 now offers a simple and effective way to test multiple values and perform conditional actions: the match-case statement. How To Implement the Match-Case Statement in Python Let’s look at how to implement this in Python 3.10, using the new match-case statement. If there is no matching case clause for expression, the code under the default clause gets executed. Once a matching case clause is found, the code inside that case clause is run. In the above code, expression gets compared against the values in each case clause. Could it be the computer side of the USB-A connection that is mechanically failing, possibly dropping the USB connection, and loosing the USB debug console data path, which could then hang the software is the debug port has disconnected?Ģ] Try a different USB-A port on your PC to see if the PC port is wearing out.ģ] Try gentle pressure on the USB-A cable end to see if you can cause the fault on demand.Switch expression # the expression has a certain valueĭo something # the program performs an action depending on the valueĭefault: # if none of the case statements is satisfiedĭo something # the program performs a default action Not sure I fully understand, but is it possible that your cable is faulty at the USB-A end, as you say unplugging/replugging the USB-C end does not fix issue, but USB-A does. At least now I have a recovery plan: unplug and replug the USB-A connector! Furthermore, once the connection is established, and with the picosystem interpreter running in thonny, if I don't type into thonny (or click any of its buttons) for a few minutes the connection is lost once again - it's like there is something timing out. If I do the same for the USB-C end at the picosystem this has no effect. If, having lost the connection, I unplug the USB-A connector from my pi and then replug it, the connection is re-established and all is well. Within thonny Configure Interpreter I select the Port explicitly as ttyAMA0. On the picosystem I have a few python scripts including a main.py that I wrote - these were all running fine before the update. I don't recall the old version number but after the update I have 4.0.1 (with the Ukrainian flag). One of the things that was updated was thonny. Today I noticed that there were some updates on raspbian so I took them. I'm running thonny on raspbian 11 (bullseye) (on a rpi3). Which doesn't tell me anything more than I already know. Raise SerialTimeoutException('Write timeout') Self._process_output_until_active_prompt(įile "/usr/lib/python3/dist-packages/thonny/plugins/micropython/bare_metal_backend.py", line 844, in _process_output_until_active_promptįile "/usr/lib/python3/dist-packages/thonny/plugins/micropython/mp_back.py", line 337, in _interruptįile "/usr/lib/python3/dist-packages/thonny/plugins/micropython/mp_back.py", line 466, in _writeįile "/usr/lib/python3/dist-packages/thonny/plugins/micropython/serial_connection.py", line 89, in writeįile "/usr/lib/python3/dist-packages/serial/serialposix.py", line 618, in write Code: Select all 15:46:29.789 ERROR _back: Exception in MicroPython main methodįile "/usr/lib/python3/dist-packages/thonny/plugins/micropython/mp_back.py", line 139, in _init_įile "/usr/lib/python3/dist-packages/thonny/plugins/micropython/bare_metal_backend.py", line 268, in _process_until_initial_prompt
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