A certainl part of an if() structure never gets executed.

[Denis McMahon]

On Sun, 16 Jun 2013 11:07:12 +0300, Nick the Gr33k wrote:

> On 16/6/2013 9:32 πμ, Denis McMahon wrote:
>> On Sat, 15 Jun 2013 19:18:53 +0300, Nick the Gr33k wrote:
>>
>>> In both situations we still have 2 memory units holding values, so
>>> hows that different?
>>
>> Consider that each named variable is a pointer to a memory location
>> that holds a value. This is one of the ways in that a typed compiled
>> language and an untyped scripted language may differ in their treatment
>> of data items (or variables).
>>
>> Consider the following C and Python code:
>>
>> C:
>>
>> int a, b;
>> b = 6;
>> a = b;
>>
>> In C, this places the numeric value 6 into the memory location
>> identified by the variable "b", then copies the value from the location
>> pointed to by "b" into the location pointed to by "a".
>>
>> b is a pointer to a memory location containing the value 6 a is a
>> pointer to another memory location also containing the value 6
>>
>> Python:
>>
>> b = 6
>> a = b
>>
>> In Python, this first puts the value 6 in in a memory location and
>> points "b" at that memory location, then makes "a" point to the same
>> memory location as "b" points to.
>>
>> b is a pointer to a memory location containing the value 6 a is a
>> pointer to the same memory location
>>
>> Do you understand the difference?
>>
> Yes and thank you for explaining in detail to me.
> So Python economies(saves) system's memory. Good job Python!

No. Don't read that into it.

For example, in Python

a = 6
b = a
c = 6

a and b point to one memory location that contains the value 6
c points to a different memory location that contains the value 6

Python doesn't point all the variables that have the same value at the 
same location.

> A pointer = a variable that has as a value a memory address a variable =
> a memory address that has as a value the actual value we want to store.

These are really C terms, not Python terms. Stop thinking that C is 
behaving like Python.

> Is this how the thing works?

No.

Python is an interpreted language. C is a compiled language. They present 
very different feature sets to the user. You need to understand this, and 
at the moment you're not doing so.

-- 
Denis McMahon, denismfmcmahon at gmail.com