micropython/tests/float/builtin_float_round.py

# test round() with floats

# check basic cases
tests = [
    [0.0],
    [1.0],
    [0.1],
    [-0.1],
    [123.4],
    [123.6],
    [-123.4],
    [-123.6],
    [1.234567, 5],
    [1.23456, 1],
    [1.23456, 0],
    [1234.56, -2],
]
for t in tests:
    print(round(*t))

# check .5 cases
for i in range(11):
    print(round((i - 5) / 2))

# test second arg
for i in range(-1, 3):
    print(round(1.47, i))

# test inf and nan
for val in (float("inf"), float("nan")):
    try:
        round(val)
    except (ValueError, OverflowError) as e:
        print(type(e))