Delete items from List in python

Question

How to iterate through list and delete the items from it.

Answer 1

I wouldn't recommend removing items from a list while iterating through it. I don't know if it's still like this but:

Let's say you have list:
a = ['a', 'b', 'b', 'c']

When you begin iterating through it, let's say you want to remove some occurrences:

for letter in a:
if letter == 'b':
a.remove('b')

print(a) # ['a', 'b', 'c']

You might be wondering: Why is there a 'b' still?

Well, that's because when you removed the first b, the index of the second b took it's place, so the next value in the iteration would be 'c'.

If you just want to delete all items, list has a function called clear.

a.clear()
print(a) # []

If you want to remove specific items, use the remove function and pass the item value (not the index).
If you want to remove an item in a certain index, use the pop function. (Pop also returns the removed item)

I wish you success!

Answer 2

a = ["monkey", "konkey", "donkey", "kingkong"]
for i in range(len(a)-1, -1, -1):
del a[i]

Answer 3

def display(a):
for i in a:
if 'o' in i:
a.remove(i)
return a

L= ['one','book','word','example?','text']

display(L)

Expected Result
['example?','text']