Closed
Description
CircuitPython version
Adafruit CircuitPython 8.0.0-alpha.1-103-g0ed84486f on 2022-08-08; Adafruit FunHouse with ESP32S2
7.3.2Code/REPL
"""
In test_mod.py
"""
import displayio
main = displayio.Group()
sub = displayio.Group()
main.append(sub)
print("In module, is sub in main ? Expecting True:", sub in main)
"""
In code.py
"""
import displayio
from test_mod import main, sub
print("In code.py, is sub in main ? Expecting True:", sub in main)
print("Is main empty though ?", len(main) == 0)
print("Is the thing in main sub ?", main[0] == sub)
print("main[0] @", id(main[0]))
print(" sub @", id(sub))
print("""
Pratical issue: sub not in main (see above),
but believes it is in a group.
""")
group = displayio.Group()
group.append(sub)Behavior
code.py output:
In module, is sub in main ? Expecting True: True
In code.py, is sub in main ? Expecting True: False
Is main empty though ? False
Is the thing in main sub ? False
main[0] @ 1071170544
sub @ 1073216608
Pratical issue: sub not in main (see above),
but believes it is in a group.
Traceback (most recent call last):
File "code.py", line 16, in <module>
ValueError: Layer already in a group
Description
When a displayio Group is added to another Group in a module during import, it is no longer the same object after import. It looks like a consequence of the long lived memory optimization ? Like the group is copied to the end of the heap, but the pointer in the parent group isn't updated ? I don't know, I might have that wrong.
- This doesn't happen if the code is all in code.py.
- This doesn't happen if
main.append(sub)is done from a function called after import. This doesn't seem to happen with regular lists.- Didn't test other ports/boards.
This was reported on the forums https://forums.adafruit.com/viewtopic.php?f=60&t=193448
Additional information
No response