How to filter strings from a list of values?

Question

values = [3, '2', '6']
var1 = []
for i in values:
if type(i) == str:
var1.append(i)

#it works
# but what if
# the case is :

values = [ none, W, e a t, '5', '0', 3]

Answer 1

W is not a string But 'W' is a string
without quotes it is considered as a variable not string
hence the list values is not valid

Answer 2

Should work too