"Deborah Swanson" <pyt...@deborahswanson.net> writes:
> Michael Torrie wrote:
>> On 12/30/2016 05:26 PM, Deborah Swanson wrote:
>> > I'm still wondering if these 4 lines can be collapsed to one or two
>> > lines.
>>
>> If the logic is clearly expressed in the if blocks that you
>> have, I don't see why collapsing an if block into one or two
>> lines would even be desirable. Making a clever one-liner out
>> of something isn't always a good thing. In fact some
>> programmers don't like to use the ternary operator or
>> conditional expressions, preferring to use explicit if block logic.
>>
>
> Maybe it isn't always a good thing, but learning the capabilities of
> python is. Besides, if the concern is future maintenance, a lot would
> depend on the proficiency of those expected to maintain the code.
One line:
l1[st], l2[st] = (l1[st] or l2[st]), (l2[st] or l1[st])
(The parentheses are redundant.)
Two lines:
l1[st] = l1[st] or l2[st]
l2[st] = l2[st] or l1[st]
Both of these store the same value back in the given field if it's
considered true (non-empty), else they store the corresponding value
from the other record in the hope that it would be considered true
(non-empty).
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