I thought I would share a recent use I had for "given":

I have this comprehension:

potential_updates = {y: command.create_potential_update(y)

for x in need_initialization_nodes

for y in [x, *x.synthetic_inputs()]}

I want to filter out values that are None. I don't want to call the function call twice, so I have to resort to using a loop and appending or the for z in [y] trick. With "given", I can write:

potential_updates = {

y: potential_update

for x in need_initialization_nodes

for y in [x, *x.synthetic_inputs()]

given potential_update = command.create_potential_update(y)

if potential_update is not None}

I also wanted to point out that code like this is self-commenting because the key and value of the comprehension can be given names.