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From: Peter Otten <__peter__@web.de>
Subject: Re: Rule of order for dot operators?
Date: Sat, 16 May 2015 21:34:20 +0200
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References: <55579886.3010001@cdreimer.com>
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Xref: csiph.com comp.lang.python:90754

C.D. Reimer wrote:

> Greetings,
> 
> Noobie question regarding a single line of code that transforms a URL
> slug ("this-is-a-slug") into a title ("This Is A Slug").
> 
> title = slug.replace('-',' ').title()
> 
> This line also works if I switched the dot operators around.
> 
> title = slug.title().replace('-',' ')
> 
> I'm reading the first example as character replacement first and title
> capitalization second, and the second example as title capitalization
> first and character replacement second.
> 
> Does python perform the dot operators from left to right or according to
> a rule of order (i.e., multiplication/division before add/subtract)?

You can find out yourself by using operations where the order does matter:

"Test".upper().lower()