circuitpython/tests/basics/class_item.py

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# test class with __getitem__, __setitem__, __delitem__ methods
class C:
def __getitem__(self, item):
print('get', item)
return 'item'
def __setitem__(self, item, value):
print('set', item, value)
def __delitem__(self, item):
print('del', item)
c = C()
print(c[1])
c[1] = 2
del c[3]
# index not supported
class A:
pass
a = A()
try:
a[1]
except TypeError:
print('TypeError')