micropython/tests/float/inf_nan_arith.py
Damien George 8d5a40c86e py/objfloat: Fix handling of negative float to power of nan.
Prior to this commit, pow(-2, float('nan')) would return (nan+nanj), or
raise an exception on targets that don't support complex numbers.  This is
fixed to return simply nan, as CPython does.

Signed-off-by: Damien George <damien@micropython.org>
2020-09-11 10:03:57 +10:00

21 lines
587 B
Python

# Test behaviour of inf and nan in basic float operations
inf = float("inf")
nan = float("nan")
values = (-2, -1, 0, 1, 2, inf, nan)
for x in values:
for y in values:
print(x, y)
print(" + - *", x + y, x - y, x * y)
try:
print(" /", x / y)
except ZeroDivisionError:
print(" / ZeroDivisionError")
try:
print(" ** pow", x ** y, pow(x, y))
except ZeroDivisionError:
print(" ** pow ZeroDivisionError")
print(" == != < <= > >=", x == y, x != y, x < y, x <= y, x > y, x >= y)