QUERY · ISSUE

docs: non standard behaviour of float()

openby massimosalaopened 2023-06-22updated 2025-11-06

docs

See
https://github.com/micropython/micropython/issues/11735

The official page
https://docs.micropython.org/en/latest/genrst/builtin_types.html#float
should be updated about the different result of

float('_')

(and eventually other invalid inputs)
between Python and MicroPython.

CANDIDATE · ISSUE

esp32: `misc/rge_sm.py` test fails with hardware floating point enabled.

openby agattiopened 2025-05-25updated 2025-05-25

bug

Port, board and/or hardware

generic esp32 board with ESP32_GENERIC

MicroPython version

MicroPython v1.26.0-preview.148.g49f81d504.dirty on 2025-05-25; Generic ESP32 module with ESP32

Reproduction

Build the current master (49f81d5046aaeb31f90626426363ae2518dbd810) ESP32 port with hard floating point support enabled (force MICROPY_OBJ_REPR set to MICROPY_OBJ_REPR_C and MICROPY_FLOAT_IMPL set to MICROPY_FLOAT_IMPL_FLOAT)
Flash the firmware on the board and run the test suite
misc/rge_sm test will fail.

Expected behaviour

tests/misc/rge_sm.py should not fail with hard floating point support enabled.

Observed behaviour

The test output is attached:

misc_rge_sm.py.out.txt

Additional Information

Maybe the test should be rewritten using unittest.assertAlmostEqual to perform the value comparisons instead of relying on rounding behaviour.

I'm aware I'm trying out an uncommon object representation for the target in question, but I wonder if other MCUs with hardware floating point also exhibit the same test failure since the test relies on how float rounding is performed to pass.

Code of Conduct

Yes, I agree