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opt_level.py

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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)')