What interprets python code on an m0 board?
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- kekerino
- Posts: 24
- Joined: Wed Jan 27, 2016 4:48 pm
What interprets python code on an m0 board?
I want to know the name of the OS or shell or interpreter program that is running at a lower level on my Trinket M0. Whenever I ctrl-c and exit the running python program in the shell, I'm just like, "Okay, what shell am I actually in?" I'm assuming it's not Bash because it's not Linux, but then what? Can I run a python program from inside whatever shell it is? Eg; If I have main1.py and main2.py, can I direct the shell to open and run one of them? Can I run specific functions from within the shell? Or are ctrl-c and ctrl-d the only commands? They're all I know of, anyway.
- danhalbert
- Posts: 4649
- Joined: Tue Aug 08, 2017 12:37 pm
Re: What interprets python code on an m0 board?
It's not a shell per se, it's the CircuitPython "Read Eval Print Loop" (REPL). The REPL reads a Python expression or statement and executes it. So you can type Python at it and the Python gets executed.
Regular Python (e.g. from https://python.org) also has a REPL. Many interpreted languages do.
If you have `main1.py` stored in CIRCUITPY, you can run it once by typing `import main1`. But the main point of doing `import` is to define a bunch of functions, classes or variables, not to run a piece of code. So if you do `import main1`, it will not re-run the program. To run it again, type ctrl-D, which restarts CircuitPython fresh, and then import it again.
There are operating-system-like things you can do. For instance,
Regular Python (e.g. from https://python.org) also has a REPL. Many interpreted languages do.
If you have `main1.py` stored in CIRCUITPY, you can run it once by typing `import main1`. But the main point of doing `import` is to define a bunch of functions, classes or variables, not to run a piece of code. So if you do `import main1`, it will not re-run the program. To run it again, type ctrl-D, which restarts CircuitPython fresh, and then import it again.
There are operating-system-like things you can do. For instance,
Code: Select all
import os
os.listdir()
- kekerino
- Posts: 24
- Joined: Wed Jan 27, 2016 4:48 pm
Re: What interprets python code on an m0 board?
Thanks, it helps me understand what is going on a little more.
Please be positive and constructive with your questions and comments.