# l = [1,2,3]
# l[0:2]=[3,4]
# print l
# l.append([16,17,19])
# print l


#
# l = [1,2,3]
# print l,id(l)
# l[0:2]=[3,4]
# print l,id(l)
# t = l
# print l,id(l)
# l=l+[16,17,19]
# print l,id(l), id(t), t
# del l[1:3]
# print l,id(l), id(t), t
#

# alias!!
# l = [1,2]
# t = l
# t[0]=5
# print l

# #cloning!!
# l = [1,2]
# t = l[:]
# t[0]=5
# print l,t


# x = 1
# def f(x):
#     x = x+1
#     print x
#
# f(x)
# print x
#
# x = [1,2]
# print id(x)
# def f(x):
#     print id(x)
#     x = x+[1]
#     print id(x)
#     print x
#
# f(x)
# print x


# x = [1,2]
# print id(x)
# def f(x):
#     print id(x)
#     x[0]=20
#     print id(x)
#     print x
#
# f(x)
# print x


# def tail(list):
#   print id(list[:1])
#   return list[1:]
#
# l = [1,2,3,4,5]
# print id(l)
# l1 = tail(l)
# print l1, id(l1), l, id(l)

# tuple = 'a', 'b','c', 'd', 'e'
# print tuple
# print tuple[2]
# print len(tuple)
# print tuple[1:4]
# #tuple[2]=45  NOOOOOOO!!!!
# t = tuple+tuple
# s=t
# print t, type(t), len(t), id(t)
# t = t+(1,)
# print t, id(t),s,id(s)


# t = 1,
# t = (2,3)+t
# print t
# print id(t)
#
# def f(x):
#     print id(x)
#     print x[0]
#     x=x[1:3]
#     print id(x)
#     print x
#
# f(t)
# print t

# for i in t:
#     print i




# l=[1.2,'ciao']
# print l
# t = ('ciaotupla',1,l)
# print t
# t2 = (t,l)
# print t2
# l2 = [t2,t,l]
# print l2[0][0][0][0]
#
# for i in l2:
#     print i[0]
#     if type(i)==list:
#         print i+[3]


#
# a , b, c = (1,2,3)
# print a
#
# a,c = c,a
# print type((c,a))
#
# print a, type(a)


d = {}
print type(d)
d[1]='ciao'
d['ciao']=1
d[2]='ciao',1
d['ciao']=2
d[2]='ciao',2
print d, len(d)

d2 = {'ciao':1,23:1}
print d2
print d2[23]
print d.keys()

#print d.keys().sort()

#
# for i in d.keys():
#     print d[i]
# print 2 in d.keys()

# d3 = {1:[2,3,4]}
# print d3[1]
# d3[1]=d
# print d3



d4 = {1:'one',2:'two',3:'three'}
l5 = d4.keys()
print l5.sort(l5)
#
# for i in d4.keys():
#     print i, d4[i]