def somma (*a): # Come a pagina 2.
  s=0
  for x in a: s+=x
  return s

print map(somma,
  (0,1,5,4),(2,0,3,8),(6,2,2,7))
# [8, 3, 10, 19]
---------------------------------------
print map(None,(1,2,3))
# [1, 2, 3]

print map(None,(11,12,13),(21,22,23))
# [(11, 21), (12, 22), (13, 23)]

v=map(None,
  (11,12,13),(21,22,23),(31,32,33))
for r in v: print r
---------------------------------------
a=(2,3,5,0,2); b=(1,3,8,0,4)

def f(x,y): return (x+y,x-y)

for x in map(f,a,b): print x,
# (3,1) (6,0) (13,-3) (0,0) (6,-2)
---------------------------------------
a=('Roma','Pisa','Milano','Trento')
print [x[0] for x in a]
# ['R', 'P', 'M', 'T']

a=[x*x+3 for x in xrange(8)]
print a
# [3, 4, 7, 12, 19, 28, 39, 52]

a=[x+y for x,y in ((3,2),(5,6),(1,9))]
print a
# [5, 11, 10]
---------------------------------------
def rapp2pv (n): # Prima versione.
  if n<=1: v=[n]
  else:
    v=rapp2pv(n/2)
    if n%2==0: v.append(0)
    else: v.append(1)
  return v
---------------------------------------
def rapp2 (n,cifre=0):
  if n<=1: v=[n]
  else:
    v=rapp2(n/2)
    if n%2==0: v.append(0)
    else: v.append(1)
  d=cifre-len(v)
  if d>0: v=[0]*d+v
  return v
---------------------------------------
def strdalista (a,sep=' '):
  return sep.join(map(str,a))

for n in range(13)+ \
  [19,48,77,106,135,164,194,221]:
  print "%3d  %s" \
    %(n,strdalista(rapp2(n,cifre=8)))
---------------------------------------
for n in xrange(256):
  print "%3d  %s" \
    %(n,strdalista(rapp2(n,cifre=8)))