circuitpython/tests/micropython/emg_exc.py

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# test that emergency exceptions work
import micropython
import sys
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try:
import uio
except ImportError:
print("SKIP")
raise SystemExit
# some ports need to allocate heap for the emg exc
try:
micropython.alloc_emergency_exception_buf(256)
except AttributeError:
pass
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def f():
micropython.heap_lock()
try:
raise ValueError(1)
except ValueError as er:
exc = er
micropython.heap_unlock()
# print the exception
buf = uio.StringIO()
sys.print_exception(exc, buf)
for l in buf.getvalue().split("\n"):
if l.startswith(" File "):
print(l.split('"')[2])
else:
print(l)
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f()