Processing two Lists (Python)

# the government inner circle keeps two lists of countries
# one is the yeList of countries that pretty well go along with any adventure 
# and the other list is the noList of countries that are not always with us
# let's assume these lists have gotten longer and some countries now appear in both lists
# you have to find which ones have dared to say no and remove them from the yeList
# tested with Python24          vegaseat         04jul2005

yeList = ['England','Italy','Portugal','Spain','Israel','Poland','Morocco','Japan','Danmark']
noList = ['China','Canada','Brazil','Germany','Iran','Spain','France','Russia','Turkey']

print "yeList =", yeList
print "noList  =", noList

print

# since the original yeList would change, we are making a copy to use
# (note, an alias like yesList = yeList has the identical address and would change too)
yesList = yeList[:]

# using try and except ...
for country in yesList:
    try:
        # if found in noList remove from yesList
        pos = noList.index(country)
        print pos, country  # test
        yesList.remove(country)
    except ValueError:
        pass

print '-'*70
print "washed yesList =", yesList

print

# another way to do this, using filter() ...
yesList = yeList[:]
yesList = filter(lambda s: s not in noList, yesList)
print '-'*70
print "laundered yesList =", yesList

print

# yet another way to do it, using list comprehension ...
yesList = yeList[:]
yesList = [country for country in yesList if country not in noList]
print '-'*70
print "sanitary yesList =", yesList

print

# should one of the lists be very long, then it is efficient to convert it to a set ...
yesList = yeList[:]
noSet = set(noList)
yesList = [country for country in yesList if country not in noSet]
print '-'*70
print "immaculate yesList =", yesList

print

# fast algorithm, easy to comprehend, but changes the order ...
yeSet = set(yeList)
noSet = set(noList)
newyesSet = yeSet - noSet
print "the newyesSet =", newyesSet