list.remove(obj) problem

Question

Does list.remove(obj), remove all instances of obj from the list?

Answer 1

It's only remove the first occurence found...

To remove all corresponding elements, you need to iterate over. For example:

arr = [ 'a', 'a', 'ab', 'b']
while ( 'a' in arr ):
arr.remove('a')
print(arr)

output:
[ 'ab', 'b' ]

You can do more complex tests/changes by iterate over all each elements, maybe using map() method and/or list comprehension ^^

Answer 2

Yes and no, here's an example:

a = ['a', 'ab', 'ba', 'b']
a.remove('a')
print(a)

The output would be:

['ab', 'ba', 'b']

Answer 3

Here's how to remove every instance of a:

a = ['a', 'ab', 'ba', 'b']
a = (" ").join(a) #converts list 'a' to a string
a = a.replace("a", "") #replaces a with empty string
a = a.split(" ") #coverts string 'a' to a list with each object beginning at a space
a.remove("") #removes all empty strings
print(a)

Answer 4

no, as in a = ['a', 'a', 'ab', 'b' ]
does remove, remove both the 'a'?

Answer 5

thanks