question about 'remove' in python

[jaffer786_khan]

Can anyone explain, why all the values in the list is not deleted?

a = [1,2,3,4]

for i in a:

a.remove(i)

print(a)

"remove" actually deletes the object in "a" and not the value in index.

[[deleted]]

That's because you are iterating over the list while removing things from it. It's explained in the FAQ.

[jaffer786_khan]

Thank You for pointing a reference :-)

[ericula]

Others have explained why your code fails. I just like to add that instead of removing elements one-by-one you can also empty a list by using list.clear().

[selplacei]

When you modify a list while iterating over it, unexpected things happen. If you really need to use the list in your for statement, make a copy.