micropython/tests/micropython/viper_types.py

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Python

# test various type conversions
import micropython
# converting incoming arg to bool
@micropython.viper
def f1(x: bool):
print(x)
f1(0)
f1(1)
f1([])
f1([1])
# taking and returning a bool
@micropython.viper
def f2(x: bool) -> bool:
return x
print(f2([]))
print(f2([1]))
# converting to bool within function
@micropython.viper
def f3(x) -> bool:
return bool(x)
print(f3([]))
print(f3(-1))