modify element of a list.

[KraftDiner]

Hi I have a list of Ojbects... I want to change one of the objects in
the list for a new object....
How do I replace an existing object with a new one and maintain the
list order..

This is what I have...

def setAttribute(self, desc, value):
n = anObject(desc, value)
for o in self.Objects:
if o.getDescription() == desc:
self.Objects.replace(o, n) #Replace o with n?
return
self.Objects.append(n)

It's the replace in place that I don't know how to do...

 

[Pierre Quentel]

Hi,

The most simple is to use the index of the element in the list :

def setAttribute(self, desc, value):
n = anObject(desc, value)
for i,o in enumerate(self.Objects):
if o.getDescription() == desc:
self.Objects = n
return
self.Objects.append(n)

Pierre

 

[Steve Holden]

Hi I have a list of Ojbects... I want to change one of the objects in
the list for a new object....
How do I replace an existing object with a new one and maintain the
list order..

This is what I have...

def setAttribute(self, desc, value):
n = anObject(desc, value)
for o in self.Objects:
if o.getDescription() == desc:
self.Objects.replace(o, n) #Replace o with n?
return
self.Objects.append(n)

It's the replace in place that I don't know how to do...

There are a number of ways. I suspect the simplest would be (untested):

def setAttribute(self, desc, value):
n = anObject(desc, value)
for i, o in enumerate(self.Objects):
if o.getDescription() == desc:
self.Objects = n
return
self.Objects.append(n)

regards
Steve