quick beginners List comprehension question

[Terry Reedy]

Dr Mephesto wrote:
> Hi,
> Im new to python, and OOP, and am trying to get a handle on list
> comprehension.
> 
> Say I have a class Foo with a property called bar:
> 
> class Foo:
>     def __init__(self):
>         self.bar = random.randint(1,100)
> 
> and then I make a list of these objects:
> 
> Newlist = []
> for x in range(10):
>     Newlist.append(Foo())

Constructing this list is the appropriate place for a comprehension.
Newlist = [Foo() for _ in range(10)]

> Now, suppose I wanted to triple the value of 'bar', I could always do:
> 
> for x in range(10):
> 	Newlist[x].bar = Newlist[x].bar * 3

Use MRAB's replacement for this.

> but can I do this using list comprehension?

Don't, for reasons given by others.

tjr