Indentation for code readability

[Robert Kern]

Steven D'Aprano wrote:
> On Fri, 30 Mar 2007 02:04:45 -0700, DE wrote:
> 
>> Hello,
>>
>> Here is what I do in C++ and can not right now in python :
>>
>> pushMatrix()
>> {
>>      drawStuff();
>>
>>      pushMatrix();
>>      {
>>             drawSomeOtherStuff()
>>      }
>>      popMatrix();
>> }
>> popMatrix();
>>
>> The curly brackets have no functional meaning 
>> but increase the readability significantly. 
> 
> I don't understand why you are indenting 
> the function calls. What does the
> indentation and spacing signify?

pushMatrix() pushes a transformation matrix onto the stack of transformation
matrices. The drawing functions draw inside this context of transformations.
popMatrix() pops the last transformation matrix. For example, one could push a
rotation matrix that rotates the coordinate system 90 degrees from horizontal.
drawStuff() might draw some text; usually this would be horizontal, but in the
context of the transformation, it will ultimately be drawn vertically.

As others have mentioned, this is a perfectly good application of Python 2.5's
"with" statement and its context managers. The indentation is meaningful and useful.

> Some people 
>     have a strange 
>         idea of 
>     "increase 
> readability".

Please contain the snark. You didn't understand why someone might want this, and
that's fine. But please wait until you get a response before assuming that there
could be no good reason for wanting this.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco