====== dict ======

===== merge dictionaries =====

[[https://docs.python.org/3.9/whatsnew/3.9.html#dictionary-merge-update-operators|Dictionary Merge & Update Operators]]
<code python>
c = a | b
a |= b
</code>

===== comprehension =====

<code python>
example_a = {x: x**2 for x in (2, 4, 6)}

example_choices = {0: "disabled"} | {x: str(x) for x in range(10,91,10)} | { 99: "max" }
</code>