Strange behavior of REPL

[jcf]

Yesterday when I wanted to demonstrate to some friends how easy it is to work with a Pico, I noticed something strange.

In normal Python on the PC, I was used to this:

Code: Select all

>>> 3+5
8

The Pico did this:

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MicroPython v1.18 on 2022-01-17; Raspberry Pi Pico with RP2040
Type "help()" for more information.
>>> 3+5
0x11

I suppose the "0x11" is something like an address?

Is this behavior wanted or is it a bug?
I don't remember having noticed it in the past.

By the way,

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>>> print(3+5)
8

gives the right result.

[pythoncoder]

Not here it doesn't:

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MicroPython v1.18-143-g40f424516 on 2022-03-27; Raspberry Pi Pico with RP2040
Type "help()" for more information.
>>> 3+5
8

FWIW it would undoubtedly be a bug - but I can't explain what you're seeing.

[Roberthh]

I get proper results as well.

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>>> 3+5
8
>>> 
MicroPython v1.18-355-g9ab66b50c on 2022-04-16; Raspberry Pi Pico with RP2040
Type "help()" for more information.

Edit: using the generic 1.18 version as well:

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>>> 3+5
8
>>> 
MicroPython v1.18 on 2022-01-17; Raspberry Pi Pico with RP2040
Type "help()" for more information.

[jcf]

I tested it again, this time by using GtkTerm as terminal, and I got the right result:

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MicroPython v1.18 on 2022-01-17; Raspberry Pi Pico with RP2040
Type "help()" for more information.
>>> 3+5
8

So it must be a bug in Thonny!

[Shards]

Or possibly the version of Thonny you are using? Works right for me using Thonny 3.2.7 on Linux Mint 20.1

[jcf]

The problem occured in version 3.3.14 under Linux Mint

[KJM]

Maybe let the Thonny folks know, I've found them super helpful.

[jcf]

I did so, and I got a really fast answer (super!):

Did you have the Heap pane (View => Heap) opened? In this case Thonny was in "heap mode", which is meant for explaining mutable objects (see https://youtu.be/nwIgxrXP-X4?t=247 for explanation)

And, yes, that was the reason.