Calling Values

[Subhabrata]

Dear Group,

I am trying to call the values of one function in the another function in the following way:
def func1():
num1=10
num2=20
print "The Second Number is:",num2
return

def func2():
num3=num1+num2
num4=num3+num1
print "New Number One is:",num3
print "New Number Two is:",num4
return

I am preferring not to use argument passing or using class? Is there any alternate way?

Thanking in Advance,
Regards,
Subhabrata.

 

[Mark Lawrence]

Dear Group,

I am trying to call the values of one function in the another function in the following way:
def func1():
num1=10
num2=20
print "The Second Number is:",num2
return

def func2():
num3=num1+num2
num4=num3+num1
print "New Number One is:",num3
print "New Number Two is:",num4
return

I am preferring not to use argument passing or using class? Is there any alternate way?

Thanking in Advance,
Regards,
Subhabrata.

I think you've got the wrong group, but I don't know the best one for
psychiatrists Seriously I can't see what you're trying to achieve
with this approach. Can you explain it and I'm certain that we'll come
up with a decent solution to your problem, whatever that may be.

 

[Ulrich Eckhardt]

Am 03.08.2012 13:49, schrieb Subhabrata:

I am trying to call the values of one function in the
another function in the following way:

def func1():
num1=10
num2=20
print "The Second Number is:",num2
return

def func2():
num3=num1+num2
num4=num3+num1
print "New Number One is:",num3
print "New Number Two is:",num4
return

I am preferring not to use argument passing or using class?

You could make those variables global, see the "global" statement in the
documentation of the language. However: I don't think that is a good
idea and it will make your program more confusing to read than
necessary, but go ahead and make that experience yourself.

If you want, you can post your code here when done so that others might
give you hints how to do things easier and cleaner, like e.g. putting
spaces around operators and using four spaces indention (See PEP 8) or
dropping the implied return from functions that return nothing. Apart
from that, the above code is too short and with too little info what
it's supposed to achieve, I can't really give you better advise.

Good luck!

Uli

 

[Nobody]

I am trying to call the values of one function in the another function
in the following way:
def func1():
num1=10
num2=20
print "The Second Number is:",num2
return

def func2():
num3=num1+num2
num4=num3+num1

A function's local variables only exist while that function is being
executed[1]. It's meaningless to try to access them from outside the
function.

[1] There is an exception (closures), but it doesn't have any bearing on
this particular problem.

 

[subhabangalore]

Dear Group,



I am trying to call the values of one function in the another function in the following way:

def func1():

num1=10

num2=20

print "The Second Number is:",num2

return



def func2():

num3=num1+num2

num4=num3+num1

print "New Number One is:",num3

print "New Number Two is:",num4

return



I am preferring not to use argument passing or using class? Is there any alternate way?



Thanking in Advance,

Regards,

Subhabrata.

Dear Group,

def func1():

num1=10

num2=20

print "The Second Number is:",num2

return


def func2():

func1()
num3=num1+num2

num4=num3+num1

print "New Number One is:",num3

print "New Number Two is:",num4


This works. Even you can incoportate some conditionals over func1() in func2() and run.
My question can I call its values of func1() too?
What it is the big deal in experimenting we may come up with some new code or a new need?
Indentation slightly differs while you post, I agree. Return I just like too use.
Mark you are too concerned for me, thanks.

Regards,
Subhabrata.

 

[Prasad, Ramit]

def func1():

num1=10

num2=20

print "The Second Number is:",num2

return


def func2():

func1()
num3=num1+num2

num4=num3+num1

print "New Number One is:",num3

print "New Number Two is:",num4


This works. Even you can incoportate some conditionals over func1() in func2()
and run.

This does not work. Python does not get "compiled" in the same manner
as other languages (C, Java etc). Since you never call func2(), there is no
error. Once you try calling func2() you will see it does not work. func1()
does work.

The Second Number is: 20
Traceback (mostrecent call last):
File "subha.py", line 24, in <module>
func2()
File "subha.py", line 15, in func2
num3=num1+num2
NameError: global name 'num1' is not defined

My question can I call its values of func1() too?
What it is the big deal inexperimenting we may come up with some new code or
a new need?

It is not a big deal, that is how you learn. You are just writing code that
neither works nor really shows enough to tell us why or what you are trying
to do. Not much I can do to guide or help you because I am completely lost
at your goal. The best I can do at the moment is say. func2 will not work.
You could return num1 and num2 from func1() and then it would work.

def func1():
num1=10
num2=20
print "The Second Number is:",num2
returnnum1, num2


def func2():
num1, num2 = func1()
num3=num1+num2
num4=num3+num1
print "New Number One is:",num3
print "New Number Two is:",num4


func2()

Ramit
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[Ethan Furman]

Dear Group,

def func1():

num1=10

num2=20

print "The Second Number is:",num2

return


def func2():

func1()
num3=num1+num2

num4=num3+num1

print "New Number One is:",num3

print "New Number Two is:",num4


This works.

No, it doesn't. If it does work for you then you have code you aren't
showing us.

~Ethan~

 

[Steven D'Aprano]

I am preferring not to use argument passing

It's not 1964 any more and you're not programming in BASIC.

What you have just told us is that you prefer not to write good quality
programs, and that you prefer to write buggy, hard to maintain code.

Of course that is your right to make such a foolish choice, but you
shouldn't expect people to help you. There is enough terrible code in the
world without encouraging people to write more.

If you would like to learn good coding techniques, please stay around
here and pay attention to modern practices for writing good quality code.
If you would rather stick to worst-practices from the 1960s, don't expect
any encouragement.

 

[Dennis Lee Bieber]

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_(computer_programming)
(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
....

 

[subhabangalore]

On Fri, 3 Aug 2012 04:49:46 -0700 (PDT), Subhabrata

<[email protected]> declaimed the following in

gmane.comp.python.general:






Technically, "the values of one function" are whatever it RETURNS;




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_(computer_programming)

(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.





Misleading print statements, as you are NOT changing "number one" or

"number two"; you've just created two NEW names (num3, num4).







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

(e-mail address removed) 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, num1=10
num2=20
print "The Second Number is:",num2

func1()
num3=50
print "The New Number is:",num3
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 Ithink 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.

 

[subhabangalore]

On Fri, 3 Aug 2012 04:49:46 -0700 (PDT), Subhabrata

<[email protected]> declaimed the following in

gmane.comp.python.general:






Technically, "the values of one function" are whatever it RETURNS;




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_(computer_programming)

(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.





Misleading print statements, as you are NOT changing "number one" or

"number two"; you've just created two NEW names (num3, num4).







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

(e-mail address removed) 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, num1=10
num2=20
print "The Second Number is:",num2

func1()
num3=50
print "The New Number is:",num3
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 Ithink 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.

 

[alex23]

I am preferring not to use argument passing or using class? Is there any alternate way?

If you don't want to program in Python, don't use Python.