Sorting command in python

a = [5, 2, 4, 5]
print sorted(a)
print a
strs = ['Green','Red', 'Blue','white','violet']
print sorted(strs)
print sorted(strs, reverse=True)
print sorted(strs, key=len)
print sorted(strs, key=str.lower)
def MyFn(s):
return s[-1]
print sorted(strs, key=MyFn)
squares = [ n * n for n in a]
mac = ['hi', 'Everyone']
shout = [s.upper() + '!!!' for s in mac]
colorsa = [ s.upper() for s in strs if 'e' in s]
print colorsa
print colorsb
print shout
print squares
print strs.sort()
btuple = (1,2,'hi')
print len(btuple)