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Get Started Now!A Python dictionary is said to have a nested structure if value of one or more keys is another dictionary. A nested dictionary is usually employed to store a complex data structure.
The following code snippet represents a nested dictionary:
marklist = { "Mahesh" : {"Phy" : 60, "maths" : 70}, "Madhavi" : {"phy" : 75, "maths" : 68}, "Mitchell" : {"phy" : 67, "maths" : 71} }
Example 1
You can also constitute a for loop to traverse nested dictionary, as in the previous section.
marklist = { "Mahesh" : {"Phy" : 60, "maths" : 70}, "Madhavi" : {"phy" : 75, "maths" : 68}, "Mitchell" : {"phy" : 67, "maths" : 71} } for k,v in marklist.items(): print (k, ":", v)
It will produce the following output −
Mahesh : {'Phy': 60, 'maths': 70}
Madhavi : {'phy': 75, 'maths': 68}
Mitchell : {'phy': 67, 'maths': 71}
Example 2
It is possible to access value from an inner dictionary with [] notation or get() method.
print (marklist.get("Madhavi")['maths']) obj=marklist['Mahesh'] print (obj.get('Phy')) print (marklist['Mitchell'].get('maths'))
It will produce the following output −
68 60 71
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