How to copy a dict and modify it in one line of code
Solution 1:
The simplest way in my opinion is something like this:
new_dict = {**old_dict, 'changed_val': value, **other_new_vals_as_dict}
Solution 2:
You could use keyword arguments in the dictionary constructor for your updates
new = dict(old, a=1, b=2, c=3)
# You can also unpack your modifications
new = dict(old, **mods)
This is equivalent to:
new = old.copy()
new.update({"a": 1, "b": 2, "c": 3})
Source
Notes
-
dict.copy()creates a shallow copy. - All keys need to be strings since they are passed as keyword arguments.