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Date: Sun, 31 Aug 2014 15:30:26 +1000
From: Cameron Simpson <cs@zip.com.au>
To: python-list@python.org
Subject: Re: I have tried and errored a reasonable amount of times
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On 30Aug2014 17:48, Seymore4Head <Seymore4Head@Hotmail.invalid> wrote:
>I have been told that one is a method and the other calls a method.  I
>still have to learn exactly what that means.  I'm getting there.

A method is, essentially, a function. Observe:

   def my_func(x):
     print(9)

my_func is just the name of the function, and .isupper is likewise just the 
name of the function that tests a string for uppercaseness.

Conversely, my_func() actually calls the function, and likewise .isupper() 
calls the test function, returning True or False depending on whether the 
string was uppercase or not.

A method versus a function? A method is a particular type of function. It is 
normally defined in a class, eg:

   class MyClass:

       def method_name_here(self, arg1, arg2):
         ... do something with self and arg1 and arg2 ...

When you have an object which is an instance of the class (let us call it "o"), 
when you call:

   o.method_name_here(1,2)

it invokes the function MyClass.method_name_here(o,1,2). So because the string 
"no" is an instance of str, the code:

   "no".isupper()

runs the function str.isupper("no"), which examines its argument for 
uppercaseness.

Cheers,
Cameron Simpson <cs@zip.com.au>

Why is it so hard for people to simply leave people alone? But, the answer
comes to me: they are idiots and in a perfect world, I would be permitted to
kill them all.  - Julie Rhodes <jk.rhodes@asacomp.com>