Conditional key in dictionary - python
dictionary, nonetype, python
Solution
Your approach is fine, provided you don't need to support empty values.
Consider passing in `user_device=0`, for example. `user_device` is not `None`, but it is a falsey value.
If you need to support falsey values apart from `None`, use `is not None` to test:
if user_device is not None:
parameters["user_device"] = user_device
Problem
I have a function `create_group` with an optional parameter `user_device=None`. If a non-None value is provided for `user_device`, I want a dictionary `targeting_spec` to include the key-value pair `"user_device": user_device`, and if no non-None value is provided, I do not want `targeting_spec` to include this key-value pair. How I do it now: ``` def create_group(..., user_device=None, ...): ... targeting_spec = { ... } if user_device: targeting_spec["user_device"] = user_device ... ``` Is this an accepted way of doing this? If not, what is? I ask because this seems like the type of thing Python would love to solve elegantly.