On Friday, August 3, 2012 10:50:52 PM UTC+5:30, Dennis Lee Bieber wrote:
> On Fri, 3 Aug 2012 04:49:46 -0700 (PDT), Subhabrata
>
> <[email protected]> declaimed the following in
>
> gmane.comp.python.general:
>
>
>
> > Dear Group,
>
> >
>
> > I am trying to call the values of one function in the another function in
> > the following way:
>
>
>
> Technically, "the values of one function" are whatever it RETURNS;
>
>
>
> > def func1():
>
> > num1=10
>
> > num2=20
>
> > print "The Second Number is:",num2
>
> > return
>
> >
>
> This function returns None.
>
>
>
> Recommended software design practices are that any thing inside the
>
> function should be local to just that function -- a function should be a
>
> black box -- you call it with some data, and you obtain some results
>
> when it returns; what it does internally should be "invisible" and have
>
> no effect on any other code.
>
>
>
> Read:
>
> http://en.wikipedia.org/wiki/Coupling_%28computer_programming%29
>
> (what you are attempting falls into "content coupling" if you change the
>
> use of "module" to "function")
>
>
>
> However, Python lets you declare names to be global (to the
>
> module/file). This is primarily meant to be used when a function must
>
> rebind a module level entity. (This would be "common coupling")
>
>
>
> def func1():
>
> global num1, num2
>
> ...
>
>
>
> But, as mentioned, that now makes num1 and num2 names that are known
>
> outside the functions.
>
>
>
> > def func2():
>
> > num3=num1+num2
>
> > num4=num3+num1
>
> > print "New Number One is:",num3
>
> > print "New Number Two is:",num4
>
> > return
>
> >
>
> Misleading print statements, as you are NOT changing "number one" or
>
> "number two"; you've just created two NEW names (num3, num4).
>
>
>
> > I am preferring not to use argument passing or using class? Is there any
> > alternate way?
>
> >
>
>
>
> Well, if you end func1 with
>
>
>
> return num1, num2
>
>
>
> you can change func2 into:
>
>
>
> def func2():
>
> n1, n2 = func1()
>
> num3 = n1 + n2
>
> num4 = num3 + n1
>
> ...
>
> --
>
> Wulfraed Dennis Lee Bieber AF6VN
>
> [email protected] HTTP://wlfraed.home.netcom.com/
Dear Group,
Absolutely brilliant, Ramit. Dennis also came with almost same answer. Using
global may not give clean results everytime.
I wanted to say,
>>> def func1():
num1=10
num2=20
print "The Second Number is:",num2
>>> def func2():
func1()
num3=50
print "The New Number is:",num3
>>> func2()
The Second Number is: 20
The New Number is: 50
The post went slightly wrong sorry.
No, I experiment myself on idle evenings to experiment with coding etc so I
think of problems, practice on them and try to see if any better code evolves.
Nothing else. I posted and Steve did not comment perhaps never happens. He
rebukes me so much from my early days here, I just enjoy it.
Regards and best wishes,
Subhabrata.
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