[Tutor] Shorten Code.

[Dave Angel]

On 11/18/2011 04:01 AM, Alan Gauld wrote:
> On 18/11/11 08:16, Mic wrote:
>
>> What if I don’t write the same line of code more than once, but I write
>> similiar lines more than once. Is that okay? Ler
>> For example:
>> value="green”
>> value_1=”green”
>
> If you had a lot of these you could shorten it with a loop (BTW the 
> English term in programming terminology is "loop" not "sling" ;-)
>
> for var in [value,value_1]:
>     var = "green"

Um, that won't work.   You typed that example too quickly.
....

Mic, the problem is not "shortening code," but making it more readable, 
and easier to maintain.  If you have a series of variables that hold 
similar or identical values, or which are treated in consistent ways, 
then you should probably make a list out of them.  And that will 
naturally shorten code like this.

student0 = 4
student1 = 3
student2 = 12
student3 = 11

Replace with

students = list((4,3,12,11))

Then if you want to deal with a particular student, you might do
    student[2] = 5

But if you want to deal with the ith student, you could do
   student[i] =

and if you want to do something with all of them:
    for index, student in enumerate(students):
              students[indes] += 65

There are plenty of more advanced methods that would make even that 
simpler, but I'm trying to keep it simple.

-- 

DaveA