backcall_callback_prototype_signature_adaptation_ignore_extra_args.py

1from backcall import callback_prototype
2
3# 1. Define the signature of the callback you expect
4@callback_prototype
5def on_event(arg1, arg2):
6    """The callback should take two arguments"""
7    pass
8
9# 2. A user-provided function that might not match the signature exactly
10# In this case, it only takes one argument.
11def my_callback(arg1):
12    print(f"Callback received: {arg1}")
13
14# 3. Adapt the user function to the prototype
15# This returns a wrapper that will only pass the arguments the function accepts
16adapted = on_event.adapt(my_callback)
17
18# 4. Call the adapted function with all arguments
19# The wrapper will discard 'extra_value' because my_callback doesn't want it
20adapted("value1", "extra_value")