Am 16.05.2015 um 21:20 schrieb C.D. Reimer:
Does python perform the dot operators from left to right or according to
a rule of order (i.e., multiplication/division before add/subtract)?
In this case, it does the only thing it can do:
title = slug.replace('-',' ').title()
is performed as
* take slug
* get its replace method
* call it and take the result
* get this result's title method
* call it and store its result into title.
OTOH,
title = slug.title().replace('-',' ')
is performed as
* take slug
* get its title method
* call it and take the result
* get this result's replace method
* call it and store its result into title.
Any other order would be unintuitive and just wrong.
The reason why the result is the same is because .title() title-cases
letters after a space as well as after a '-'.
In other cases, it wouldn't do so, so you have to take care what you do.
Thomas
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