10/21/13

In [1]:

    

lists = [ [1,2,3], [4,5,6], [7,8,9] ]
print lists[0]
print lists[0][0]


    

    




[1, 2, 3]
1

In [2]:

    

#same as
print "WorDs thAT aRE nOt CapitALiZed CorRectlY".lower().title()


    

    




Words That Are Not Capitalized Correctly

In [4]:

    

word_lists = [ ["cat","dog","fish"], ["red","blue","green"] ]
print word_lists[1][2].title()


    

    




Green

In [6]:

    

a = 7
b = 7
print a == b
print a is b


    

    




True
True

In [8]:

    

a = 'dog'
b = 'dog'
print a == b
print a is b


    

    




True
True

In [10]:

    

a = [ 1,2 ]
b = [ 1,2 ]

print a == b
print a is b

a.append(5)
b.append(3)

print a
print b
del a
del b


    

    




True
False
[1, 2, 5]
[1, 2, 3]

In [11]:

    

a = [ 1, 2]
b = a

print a == b
print a is b


    

    




True
True

In [12]:

    

a.append(3)
print b


    

    




[1, 2, 3]

In [13]:

    

x = False
print x is False


    

    




True

In [15]:

    

a = [1,2]
b = a + [3]

print a
print b


    

    




[1, 2]
[1, 2, 3]

In [16]:

    

a = [1 , 2]
b = a

b = a + [3]
a = a + [3]

print a == b
print a is b


    

    




True
False

In [17]:

    

def del_head(t):
    del t[0]

def tail(t):
    return t[1:]

a = [1,2,3]
b = [1,2,3]

print a
del_head(a)
print a

print b
print tail(b)
print b


    

    




[1, 2, 3]
[2, 3]
[1, 2, 3]
[2, 3]
[1, 2, 3]

In [22]:

    

a = [1,2,3]
b = a[:]
c = list(a)
d = a + []

print a
print b
print c
print d
print a is c
del a[0]
print d


    

    




[1, 2, 3]
[1, 2, 3]
[1, 2, 3]
[1, 2, 3]
False
[1, 2, 3]

In [ ]: