d = dict(); print d
# {} - dizionario vuoto

a=[('u',1), ('v',2)]
d=dict(a); print d
# {'u': 1, 'v': 2}
---------------------------------------
cogen1=dict(Gly='ggg gga ggc ggt',
  Ala='gcg gca gcc gct',...)
---------------------------------------
voci=['Rossi','Verdi','Bianchi']
stipendi=[1800,1500,2100]

print dict(zip(voci,stipendi))
# {'Bianchi': 2100, 'Rossi': 1800,
# 'Verdi': 1500}
---------------------------------------
spec = dict(agrave=224, ntilde=241,
  zeta=950, infin=8734)
---------------------------------------
inv = {}
for x,y in tab.items():
  inv[y]=x
---------------------------------------
tab=dict(a=1, b=2)
tab1=dict(b=300, c=4, d=5)

tab.update(tab1)
print tab
# {'a': 1, 'c': 4, 'b': 300, 'd': 5}
---------------------------------------
def f (**tab):
  print tab
---------------------------------------
f(u=4,v=6,n=13)
# {'n': 13, 'u': 4, 'v': 6}
---------------------------------------
def menu (scelte, testo=''):
  while 1:
    risposta=raw_input(testo)
    if risposta=='fine': break
    if scelte.has_key(risposta):
      scelte[risposta]()

def curva (): print 'Disegno una curva.'

def media (): print 'Calcolo la media.'

def file (): print 'Carico un file.'

scelte=dict(c=curva, m=media, f=file)

menu(scelte,'scelta: ')
---------------------------------------
def menu (scelte, testo=''):
  while 1:
    risposta=raw_input(testo)
    if risposta=='fine': break
    scelte.get(risposta,passa)()

def passa (): pass
---------------------------------------
def concatl (*v):
  a=[]
  for x in v: a.extend(x)
  return a

a=[0,1,2,3,4,5]
b=[6,7,8]; c=[9,10,11,12]
print concatl(a,b,c)
# [0,1,2,3,4,5,6,7,8,9,10,11,12]
---------------------------------------
a=7; b=a; del a; print b
# 7
print a
# Errore: il nome a non e' definito

c=7; d=c; del d; print c
# 7
print d
# Errore: il nome a non e' definito
---------------------------------------
a=88; b=a; c=a; del a,c
print b
# 88
---------------------------------------
a=[0,1,2,3,4,5,6,7]
del a[1]; print a
# [0, 2, 3, 4, 5, 6, 7]

b=[0,1,2,3,4,5,6,7]
del b[2:5]; print b
# [0, 1, 5, 6, 7]
---------------------------------------
def spezza (a):
  x=a[0]; del a[0]; return x

a=[0,1,2,3,4,5,6]
x=spezza(a)
print x, a
# 0 [1, 2, 3, 4, 5, 6]
---------------------------------------
voti = {'Rossi' : 28, 'Verdi' : 27,
  'Bianchi' : 25}
del voti['Verdi']
print voti
# {'Bianchi': 25, 'Rossi': 28}
---------------------------------------
a=[0,1,2,3,4,5]
a.remove(2); print a[2]
# 3