In [89]:

    

# This is some IPython %magic
%xmode plain


    

    




Exception reporting mode: Plain

In [90]:

    

# with initial values
c = {'foo': 'bar', 'baz': 'qux'}
d = dict([('foo', 'bar'), ('baz', 'qux')])
print c
print d


    

    




{'foo': 'bar', 'baz': 'qux'}
{'foo': 'bar', 'baz': 'qux'}

In [91]:

    

# keys don't have to be strings
z = {
    3: 'a',
    'lol': {'foo': 'bar'},
    None: False,
}
print z


    

    




{None: False, 3: 'a', 'lol': {'foo': 'bar'}}

In [92]:

    

d = {'foo': 'bar'}
d['baz'] = 'qux'
print d


    

    




{'foo': 'bar', 'baz': 'qux'}

In [93]:

    

x = {'baz': 'qux'}
d.update(x)
print d


    

    




{'foo': 'bar', 'baz': 'qux'}

In [94]:

    

d['foo']


    

    
Out[94]:





'bar'

In [95]:

    

# undefined values
d['nope']


    

    




Traceback (most recent call last):

  File "<ipython-input-95-318efa976070>", line 2, in <module>
    d['nope']

KeyError: 'nope'

In [96]:

    

# case-sensitive
d['FOO']


    

    




Traceback (most recent call last):

  File "<ipython-input-96-ed9f4f52e085>", line 2, in <module>
    d['FOO']

KeyError: 'FOO'

In [97]:

    

d.get('nope', 'aha!') # also callable without a default (implies None)


    

    
Out[97]:





'aha!'

In [98]:

    

print d
d.setdefault('nope', 'aha!')
print d


    

    




{'foo': 'bar', 'baz': 'qux'}
{'nope': 'aha!', 'foo': 'bar', 'baz': 'qux'}

In [99]:

    

z[None]


    

    
Out[99]:





False

In [100]:

    

# notice the key order - there is none!
d.keys()


    

    
Out[100]:





['nope', 'foo', 'baz']

In [101]:

    

d.values()


    

    
Out[101]:





['aha!', 'bar', 'qux']

In [102]:

    

d.items()


    

    
Out[102]:





[('nope', 'aha!'), ('foo', 'bar'), ('baz', 'qux')]

In [103]:

    

print d.has_key('foo')
print d.has_key('zzz')


    

    




True
False

In [104]:

    

del(d['nope'])
print d


    

    




{'foo': 'bar', 'baz': 'qux'}

In [105]:

    

d.clear()
print d


    

    




{}