Dictionary

Dictionary:

mutable, dictionary can be modified.

Dictionary is a collection of key value pairs, for example: {‘a’:1,’b’:2,’c’:3}

Dictionary keys and values are sequences, iterables

d={'a':1,'b':2,'c':3}
for i in d.keys():
    print(i)
    
a
b
c

d={'a':1,'b':2,'c':3}
for i in d.values():
    print(i)
    
1
2
3

d[‘a’] is 1, d[‘b’] is 2, d[‘c’] is 3

You can also create a dictionary that way, use function dict()

d=dict(a=1,b=2,c=3)

Above is the same as

d={‘a’:1,’b’:2,’c’:3}

d['a'] is 1

Dictionary is an object, meaning it has methods and attributes that can be invoked

To see all methods, type

help(<dictionary variable>)

In Jupyter notebook, to see list of methods or attributes

Press shift key after enter <Dictionary variable>.