QUERY · ISSUE

f-string thousands separator doesn't work with floats

openby BrianPughopened 2023-04-17updated 2023-05-04

bugpy-core

On v1.19.1, f-string thousands separator doesn't work with floats. Tested on both unix and rp2040:

Demo code:

foo_int = 123456
foo_float = 1234.56789
print(f"{foo_int:,}   {foo_float:,}")

CPython (correct):

123,456   1,234.56789

MicroPython (incorrect):

123,456   1234.57

CANDIDATE · PULL REQUEST

f-string thousands separator for float

openby ludollaooopened 2024-12-24updated 2025-01-28

py-core

Closes #11284
thousand separator was not implemented for floating point number

test the thousand separator for different float
test that the rounding up with the thousand separator (esp : 9,999.99 rounded to 10,000.0)

couldn't test that no buffer overflow occurs when using the thousand separator