NB question on global/local variables in functions

[Wolfgang]

Hi all,

I've started to write some functions but I have some problems with
common variables in that functions.

So I have some variables which should be accessible by all my functions
but not accessible by the rest of my code. How can I do this?

Thanks
Wolfgang

###function.py:

c1=123.0
c2=134.0

def fun(temp):
return temp+c1-c2

def fun1(temp):
return temp-c1


### caller.py
from function import *
print fun(10.0)
print c1

 

[Bruno Desthuilliers]

Hi all,

I've started to write some functions but I have some problems with
common variables in that functions.

So I have some variables which should be accessible by all my functions
but not accessible by the rest of my code. How can I do this?

You can use a closure:

def makefuns():
c1=123.0
c2=134.0

def fun(temp):
return temp+c1-c2
def fun1(temp):
return temp-c1

return fun, fun1

fun, fun1 = makefuns()

fun(42)
fun1(42)


But the canonical solution is to use a class:

class Foo(object):
def __init__(self):
self._c1=123.0
self._c2=134.0

def fun(self, temp):
return temp + self._c1 - self._c2

def fun1(self, temp):
return temp - self._c1

foo = Foo()
foo.fun(42)
foo.fun1(42)