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From: Terry Reedy <tjreedy@udel.edu>
Subject: Re: Instance method for converting int to str - str() and __str__()
Date: Sat, 3 Oct 2015 06:09:25 -0400
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Xref: csiph.com comp.lang.python:97367

On 10/3/2015 2:35 AM, neubyr wrote:
>
> I was wondering if there is any resource that explains why certain
> methods like str() and type()

These are classes.  Calling a class calls the class construction and 
initialization functions.  These return an instance of the class.
While reading the tutorial, read the library reference, chapter 2. 
Chapter 4 is also extremely important to read.

-- 
Terry Jan Reedy