CODEWITHSUNDEEP
pythonlist
user3579004
user3579004

Reputation: 23

Iterate python list object and invoke each object's method

I have simple class like this

class MyClass():
    def test(self):
      print "Calling Test"

Then i create a list:

lobj=[MyClass() for i in range (100)]

Now I want to iterate each object in lobj and invoke its medthod test(). I know i can use for loop. However, i wonder if there is any other way (just to avoid the for loop when the list is relatively large)? For example 

lobj[:].test()

Upvotes: 2

Views: 79

Answers (2)

Christian Tapia
Christian Tapia

Reputation: 34146

...I wonder if there is any other way (just to avoid the for loop when the list is relatively large)?

Yes. You can use the built-in function map() and a lambda function. If you want to just call the method on each element, do:

map(lambda x:x.test(), lobj)

And if you want to store the results in a list:

v = map(lambda x:x.test(), lobj)

Upvotes: 5

sshashank124
sshashank124

Reputation: 32189

The best you can do is:

[i.test() for i in lobj]

This calls the method but then doesn't store the result anywhere so the list gets discarded after it is done calling the method for all the instances.

Upvotes: 3

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