Remove a class instance from a list

Question

I'm not sure if this is possible, but if anyone has any workarounds, that would be great.

If have a class like so:

class person:
    def __init__(self, name):
        self.name = name

And I add a bunch of instances of this class to a list, like so:

people = [person("Bob"), person("Tim"), person("Sue")]

I would, in a perfect world like to then perform this code:

people.remove(person("Bob"))

However, unfortunately, due to the way classes work, this is not possible. Is there some sort of workaround for this? Preferably something that fits onto one line?

Any ideas welcome!

Know that you can also define something like `def __eq__(self, other): return self.name == other.name` Then your code will work as written. — Cory Kramer, Jul 02 '15 at 17:36
@Inazuma, are you creating the instances in the list or appending already created instances to a list? — Padraic Cunningham, Jul 02 '15 at 17:42

score 1 · Accepted Answer · answered Jul 02 '15 at 17:36

1

One obvious/intuitive way might be:

people = [person for person in people if person.name != 'Bob']

answered Jul 02 '15 at 17:36

PascalVKooten

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Yes, that is obvious, should have realized that. Thanks! – Inazuma Jul 02 '15 at 18:36

score 0 · Answer 2 · answered Jul 02 '15 at 17:36

0

If the names are unique:

people = [person("Bob"), person("Tim"), person("Sue")]


people[:] = [ins for ins in people if ins.name != "Bob"]
print(people)

answered Jul 02 '15 at 17:36

Padraic Cunningham

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@PascalvKooten, the answers are actually not the same, you reassign the name, my code updates the original object/list. – Padraic Cunningham Jul 02 '15 at 17:40
That only makes a difference if more references to the object are in play, correct? – PascalVKooten Jul 02 '15 at 18:41

Remove a class instance from a list

2 Answers2