circuitpython/tests/basics/decorator.py

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# test decorators
def dec(f):
print('dec')
return f
def dec_arg(x):
print(x)
return lambda f:f
# plain decorator
@dec
def f():
pass
# decorator with arg
@dec_arg('dec_arg')
def g():
pass
# decorator of class
@dec
class A:
pass