Is there a simple way to delete a list element by value?

Question

I want to remove a value from a list if it exists in the list (which it may not).

a = [1, 2, 3, 4]
b = a.index(6)

del a[b]
print(a)

The abov

Answer 1

In one line:

a.remove('b') if 'b' in a else None

sometimes it usefull.

Even easier:

if 'b' in a: a.remove('b')