diff options
Diffstat (limited to 'docs/examples/tutorial/cdef_classes/nonecheck.py')
| -rw-r--r-- | docs/examples/tutorial/cdef_classes/nonecheck.py | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/docs/examples/tutorial/cdef_classes/nonecheck.py b/docs/examples/tutorial/cdef_classes/nonecheck.py new file mode 100644 index 000000000..dccb97435 --- /dev/null +++ b/docs/examples/tutorial/cdef_classes/nonecheck.py @@ -0,0 +1,20 @@ +# cython: nonecheck=True +# ^^^ Turns on nonecheck globally + +import cython + +@cython.cclass +class MyClass: + pass + +# Turn off nonecheck locally for the function +@cython.nonecheck(False) +def func(): + obj: MyClass = None + try: + # Turn nonecheck on again for a block + with cython.nonecheck(True): + print(obj.myfunc()) # Raises exception + except AttributeError: + pass + print(obj.myfunc()) # Hope for a crash! |