import micropython as micropython

# check we can get and set the level
micropython.opt_level(0)
print(micropython.opt_level())
micropython.opt_level(1)
print(micropython.opt_level())

# check that the optimisation levels actually differ
micropython.opt_level(0)
exec("print(__debug__)")
micropython.opt_level(1)
exec("print(__debug__)")
exec("assert 0")

# check that level 3 doesn't store line numbers
# the expected output is that any line is printed as "line 1"
micropython.opt_level(3)
exec("try:\n xyz\nexcept NameError as er:\n import sys\n sys.print_exception(er)")