In [1]:

    

d = {'key1': 'val1', 'key2': 'val2', 'key3': 'val3'}


    

In [2]:

    

print('key1' in d)


    

    




True

In [3]:

    

print('val1' in d)


    

    




False

In [4]:

    

print('key4' not in d)


    

    




True

In [5]:

    

print(d['key1'])


    

    




val1

In [6]:

    

# print(d['key4'])
# KeyError: 'key4'


    

In [7]:

    

print(d.get('key4'))


    

    




None

In [8]:

    

print('val1' in d.values())


    

    




True

In [9]:

    

print('val4' not in d.values())


    

    




True

In [10]:

    

print(('key1', 'val1') in d.items())


    

    




True

In [11]:

    

print(('key1', 'val2') in d.items())


    

    




False

In [12]:

    

print(('key1', 'val2') not in d.items())


    

    




True