Question

how to delete element the list in a for loop?
the variable a should not be reassign .modify it but don’t make new one.
the code below doesn’t work properly

a = [1,2,2,3,2,1,4]
i = 0
for j in a:
    print(j)
    if(j<=2):
        print('deleting ',i)
        del a[i]
    else:
        i+=1     
print(a) #[3, 2, 1, 4]

Answer 1

a[:]=filter(lambda x:x<=2,a)

use filter…

or list comprehension

a[:] = [itm for itm in a if itm > 2]

\edited to not destroy the original pointer… although im not sure why… seems like less than perfect design