Check if string in list of objects

Question

This is my list

[<CorrectEntry: CorrectEntry object>, <CorrectEntry: CorrectEntry object>, <CorrectEntry: CorrectEntry object>]

CorrectEntry objects looks like this :

number 
message
etc

How would I check if a any of those objects in a list has a number that I am checking for?

So I want to check if the number ex. 123 is in any of the objects in the list?

Is you list a queryset? If yes, then it is better to use filter, or values_list` in your situation — Mp0int
– Mp0int, Commented Jul 5, 2013 at 10:51

Martijn Pieters · Accepted Answer · 2013-07-05 10:27:08Z

8

Use the any() function with a generator expression:

if any(ce.number == yourvaluetotest for ce in correct_entries):
    #

The function will loop over the generator expression until a true-ish value is returned, after which itself returns True. If no such value is found, False is returned instead. This is very efficient, as it will only test as many CorrectEntry values as needed to determine that there is one that matches.

answered Jul 5, 2013 at 10:27

Martijn Pieters

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1 Comment

Harry Over a year ago

Works perfectly, great python

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