Mailman 3 Re: [Python-ideas] A real life example of "given" - Python-ideas

30 May 2018


      A side comment:
...
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}
Probably, I would write
@make_dict
def potential_updates():
    for x in need_initialization_nodes:
        for y in [x, *x.synthetic_inputs()]:
            potential_update = command.create_potential_update(y)
            if potential_update is not None:
                yield y, potential_update
If such pattern covered a lot of examples, even some syntax sugar could be
added. For example:
foo[0].potential_updates = dict(_) from:
    for x in need_initialization_nodes:
        for y in [x, *x.synthetic_inputs()]:
            potential_update = command.create_potential_update(y)
            if potential_update is not None:
                yield y, potential_update
where
<statement> from:
    <suite>
would be equivalent to
def _():
    <suite>
_ = _()
<statement>
Best regards,
Adam Bartoš