Say we have a list foo, I would like to modify that list, whether it'd be add or remove elements from it with out creating or using another list or sequence/data structure in general. Would that be possible to do with a list comprehension or no?
Modify a list with a list comprehension?
Viewed 36
1 Answers
You can't edit a list within a list comprehension, but you can access your list within a list comprehension to build a new list :
foo = list(range(10)) # foo == [0, 1, 2, ..., 9]
bar = [element for element in foo if element % 3 == 2 ]
# bar == [2, 5, 8]
You can also use the filter function to do this kind of filtering (assuming you already have foo).
bar = list(filter(lambda x: x % 3 == 2, foo))
# bar == [2, 5, 8]
As for adding elements to a list based on some logic, I see there a reason why we have for loops and list methods.
Related