How to get data from nested dictionary in Python

In Python3 we can build a simple generator to get all values from a nested dictionary. See below simple example code for it:-

Get all values from nested dictionary

def get_values(d): for v in d.values(): if isinstance(v, dict): yield from get_values(v) else: yield v a = {4: 1, 6: 2, 7: {8: 3, 9: 4, 5: {10: 5}, 2: 6, 6: {2: 7, 1: 8}}} print(list(get_values(a)))

Output:

Get all keys of a nested dictionary

Here is code that would print all team members:

Liverpool = { 'Keepers': {'Loris Karius': 1, 'Simon Mignolet': 2, 'Alex Manninger': 3}, 'Defenders': {'Nathaniel Clyne': 3, 'Dejan Lovren': 4, 'Joel Matip': 5, 'Alberto Moreno': 6, 'Ragnar Klavan': 7, 'Joe Gomez': 8, 'Mamadou Sakho': 9} } for k, v in Liverpool.items(): for k1, v1 in v.items(): print(k1)

Output:

Retrieve list of values from nested dictionaries

Iterates through the elements of the list and checks the type of each element based on the ‘id‘ and ‘children‘ naming convention.

mylist = [ {u'id': 5650, u'children': [ {u'id': 4635}, {u'id': 5648} ]}, {u'id': 67, u'children': [ {u'id': 77} ]} ] def extract_id_values(mylist): ids_to_return_list = [] for element in mylist: for key, value in element.items(): if 'id' == key: ids_to_return_list.append(value) if 'children' == key: for children_elem in value: if 'id' in children_elem: ids_to_return_list.append(children_elem['id']) return ids_to_return_list print(extract_id_values(mylist))

Output: [5650, 4635, 5648, 67, 77]

Extract values of Particular Key in Nested Values

Using list comprehension + values() + keys()

test_dict = {'Gfg': {"a": 7, "b": 9, "c": 12}, 'is': {"a": 15, "b": 19, "c": 20}, 'best': {"a": 5, "b": 10, "c": 2}} # initializing key key = "c" # using keys() and values() to extract values res = [sub[key] for sub in test_dict.values() if key in sub.keys()] print(res)

Output: [12, 20, 2]

Using list comprehension + items()

test_dict = {'Gfg': {"a": 7, "b": 9, "c": 12}, 'is': {"a": 15, "b": 19, "c": 20}, 'best': {"a": 5, "b": 10, "c": 2}} # initializing key key = "a" # using item() to extract key value pair as whole res = [val[key] for keys, val in test_dict.items() if key in val] print(res)

Output: [7, 15, 5]

Source: stackoverflow.com

Do comment if you have any doubts and suggestions on this Python dictionary list topic.

Note: IDE: PyCharm 2021.3.3 (Community Edition)
Windows 10
Python 3.10.1
All Python Examples are in Python 3, so Maybe its different from python 2 or upgraded versions.

Rohit

Degree in Computer Science and Engineer: App Developer and has multiple Programming languages experience. Enthusiasm for technology & like learning technical.

Create three dictionaries, then create one dictionary that will contain the other three dictionaries:

child1 = {
"name" : "Emil",
"year" : 2004
}
child2 = {
"name" : "Tobias",
"year" : 2007
}
child3 = {
"name" : "Linus",
"year" : 2011
}

myfamily = {
"child1" : child1,
"child2" : child2,
"child3" : child3
}

Try it Yourself »

Access Items in Nested Dictionaries

To access items from a nested dictionary, you use the name of the dictionaries, starting with the outer dictionary:

Ali 252 = {Ali 255Initial nested dictionary:- {} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}, 'Dict2': {'age': 25, 'name': 'Cara'}}0Ali 257Ali 258Ali 259Initial nested dictionary:- {} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}, 'Dict2': {'age': 25, 'name': 'Cara'}}0Initial nested dictionary:- {'Dict2': {'name': 'Bob', 'age': 21}, 'Dict1': {'name': 'Ali', 'age': 19}} Deleting Dict2:- {'Dict1': {'name': 'Ali', 'age': 19}} Deleting Dict1:- {}1Ali 258Initial nested dictionary:- {'Dict2': {'name': 'Bob', 'age': 21}, 'Dict1': {'name': 'Ali', 'age': 19}} Deleting Dict2:- {'Dict1': {'name': 'Ali', 'age': 19}} Deleting Dict1:- {}3: {Initial nested dictionary:- {'Dict2': {'name': 'Bob', 'age': 21}, 'Dict1': {'name': 'Ali', 'age': 19}} Deleting Dict2:- {'Dict1': {'name': 'Ali', 'age': 19}} Deleting Dict1:- {}5 Initial nested dictionary:- {} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}, 'Dict2': {'age': 25, 'name': 'Cara'}}0Initial nested dictionary:- {'Dict2': {'name': 'Bob', 'age': 21}, 'Dict1': {'name': 'Ali', 'age': 19}} Deleting Dict2:- {'Dict1': {'name': 'Ali', 'age': 19}} Deleting Dict1:- {}7Ali 258Initial nested dictionary:- {'Dict2': {'name': 'Bob', 'age': 21}, 'Dict1': {'name': 'Ali', 'age': 19}} Deleting Dict2:- {'Dict1': {'name': 'Ali', 'age': 19}} Deleting Dict1:- {}9 Initial nested dictionary:- {} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}, 'Dict2': {'age': 25, 'name': 'Cara'}}0nested_dict1Ali 258nested_dict3 Initial nested dictionary:- {} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}, 'Dict2': {'age': 25, 'name': 'Cara'}}0Ali 257Initial nested dictionary:- {} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}, 'Dict2': {'age': 25, 'name': 'Cara'}}9

Creating a Nested Dictionary

In Python, a Nested dictionary can be created by placing the comma-separated dictionaries enclosed within braces.

Python3

nested_dict7

Ali 252 = {=1=2

=3=4=5

=6=7Ali 255=9{0

=6{2Ali 252{4

Ali 252 = {=1: {'dict1'1Initial nested dictionary:- {} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}, 'Dict2': {'age': 25, 'name': 'Cara'}}0'dict1'3Ali 258'dict1'5Initial nested dictionary:- {} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}, 'Dict2': {'age': 25, 'name': 'Cara'}}0'dict1'7Initial nested dictionary:- {} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}, 'Dict2': {'age': 25, 'name': 'Cara'}}2

=3=4: {'dict1'1Initial nested dictionary:- {} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}, 'Dict2': {'age': 25, 'name': 'Cara'}}0: {4Ali 258'dict1'5Initial nested dictionary:- {} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}, 'Dict2': {'age': 25, 'name': 'Cara'}}0: {8Initial nested dictionary:- {} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}, 'Dict2': {'age': 25, 'name': 'Cara'}}9

=6'key_A'1Ali 259=9{0

=6{2Ali 252{4

'key_A'9

Ali 252 = {=1: {Ali 255Initial nested dictionary:- {} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}, 'Dict2': {'age': 25, 'name': 'Cara'}}0Initial nested dictionary:- {} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}, 'Dict2': {'age': 25, 'name': 'Cara'}}07Ali 258Ali 259Initial nested dictionary:- {} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}, 'Dict2': {'age': 25, 'name': 'Cara'}}0Initial nested dictionary:- {} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}, 'Dict2': {'age': 25, 'name': 'Cara'}}11Ali 258Initial nested dictionary:- {'Dict2': {'name': 'Bob', 'age': 21}, 'Dict1': {'name': 'Ali', 'age': 19}} Deleting Dict2:- {'Dict1': {'name': 'Ali', 'age': 19}} Deleting Dict1:- {}3Initial nested dictionary:- {} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}, 'Dict2': {'age': 25, 'name': 'Cara'}}0Initial nested dictionary:- {} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}, 'Dict2': {'age': 25, 'name': 'Cara'}}07Initial nested dictionary:- {} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}, 'Dict2': {'age': 25, 'name': 'Cara'}}2

=3=4: {Initial nested dictionary:- {} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}, 'Dict2': {'age': 25, 'name': 'Cara'}}20Initial nested dictionary:- {} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}, 'Dict2': {'age': 25, 'name': 'Cara'}}0Ali 257Ali 258Ali 255Initial nested dictionary:- {} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}, 'Dict2': {'age': 25, 'name': 'Cara'}}25Ali 255Ali 258Ali 259Initial nested dictionary:- {} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}, 'Dict2': {'age': 25, 'name': 'Cara'}}29

=6'key_A'1Initial nested dictionary:- {'Dict2': {'name': 'Bob', 'age': 21}, 'Dict1': {'name': 'Ali', 'age': 19}} Deleting Dict2:- {'Dict1': {'name': 'Ali', 'age': 19}} Deleting Dict1:- {}3=9{0

=6{2Ali 252{4

Output:

Nested dictionary 1- {'Dict1': {}, 'Dict2': {}} Nested dictionary 2- {'Dict1': {'name': 'Ali', 'age': '19'}, 'Dict2': {'name': 'Bob', 'age': '25'}} Nested dictionary 3- {'Dict1': {1: 'G', 2: 'F', 3: 'G'}, 'Dict2': {1: [1, 2], 'Name': 'Geeks'}}

Adding elements to a Nested Dictionary

Addition of elements to a nested Dictionary can be done in multiple ways. One way to add a dictionary in the Nested dictionary is to add values one be one, Nested_dict[dict][key] = ‘value’. Another way is to add the whole dictionary in one go, Nested_dict[dict] = { ‘key’: ‘value’}.

Python3

Ali 252 = Initial nested dictionary:- {} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}, 'Dict2': {'age': 25, 'name': 'Cara'}}41

=6Initial nested dictionary:- {} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}, 'Dict2': {'age': 25, 'name': 'Cara'}}43=9{0

=6{2Ali 252{4

Initial nested dictionary:- {} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}, 'Dict2': {'age': 25, 'name': 'Cara'}}56

=6{2Ali 252{4

Ali 252Initial nested dictionary:- {} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}, 'Dict2': {'age': 25, 'name': 'Cara'}}51=4Initial nested dictionary:- {} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}, 'Dict2': {'age': 25, 'name': 'Cara'}}53= {'dict1'1Initial nested dictionary:- {} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}, 'Dict2': {'age': 25, 'name': 'Cara'}}0Initial nested dictionary:- {} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}, 'Dict2': {'age': 25, 'name': 'Cara'}}88Ali 258'dict1'5Initial nested dictionary:- {} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}, 'Dict2': {'age': 25, 'name': 'Cara'}}0Initial nested dictionary:- {} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}, 'Dict2': {'age': 25, 'name': 'Cara'}}92Initial nested dictionary:- {} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}, 'Dict2': {'age': 25, 'name': 'Cara'}}93

=6{2Ali 252{4

Output:

Access elements of a Nested Dictionary

In order to access the value of any key in nested dictionary, use indexing [] syntax.

Python3

Ali 2525

=6{2Ali 252Initial nested dictionary:- {} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}, 'Dict2': {'age': 25, 'name': 'Cara'}}51=1Initial nested dictionary:- {} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}, 'Dict2': {'age': 25, 'name': 'Cara'}}60'dict1'1Ali 2533

Ali 2534

=6{2Ali 252Initial nested dictionary:- {} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}, 'Dict2': {'age': 25, 'name': 'Cara'}}51=4Initial nested dictionary:- {} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}, 'Dict2': {'age': 25, 'name': 'Cara'}}60'dict1'5Ali 2533

Output:

Ali 25

Deleting dictionaries from a Nested Dictionary

Deletion of dictionaries from a nested dictionary can be done either by using del keyword or by using pop() function.

Python3

Ali 252 = {=1: {'dict1'1Initial nested dictionary:- {} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}, 'Dict2': {'age': 25, 'name': 'Cara'}}0'dict1'3Ali 258'dict1'5Initial nested dictionary:- {} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}, 'Dict2': {'age': 25, 'name': 'Cara'}}0Ali 2554Initial nested dictionary:- {} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}, 'Dict2': {'age': 25, 'name': 'Cara'}}2

Ali 2556=4: {'dict1'1Initial nested dictionary:- {} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}, 'Dict2': {'age': 25, 'name': 'Cara'}}0: {4Ali 258'dict1'5Initial nested dictionary:- {} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}, 'Dict2': {'age': 25, 'name': 'Cara'}}0Initial nested dictionary:- {} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}, 'Dict2': {'age': 25, 'name': 'Cara'}}72Initial nested dictionary:- {} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}} After adding dictionary Dict1 {'Dict1': {'age': 21, 'name': 'Bob'}, 'Dict2': {'age': 25, 'name': 'Cara'}}9

How to get data from nested dict in Python?

Access Nested Dictionary Items This can be done using the special dictionary get() method. The get() method returns the value for the key if the key is in the dictionary, otherwise, it returns None.

How do you access values in nested dictionary?

To access element of a nested dictionary, we use indexing [] syntax in Python.

How to get data from dictionary of dictionary in Python?

In Python, you can get the value from a dictionary by specifying the key like dict[key] . In this case, KeyError is raised if the key does not exist. Note that it is no problem to specify a non-existent key if you want to add a new element.

How do you pop a nested dictionary value in Python?

To remove an element from a nested dictionary, use the del() method. To remove a dictionary from a nested dictionary there are two methods available in python. The pop() method returns the removed dictionary.

Get all values from nested dictionary

Get all keys of a nested dictionary

Retrieve list of values from nested dictionaries

Extract values of Particular Key in Nested Values

Access Items in Nested Dictionaries

Creating a Nested Dictionary

Python3

Adding elements to a Nested Dictionary

Python3

Access elements of a Nested Dictionary

Python3

Deleting dictionaries from a Nested Dictionary

Python3

How to get data from nested dict in Python?

How do you access values in nested dictionary?

How to get data from dictionary of dictionary in Python?

How do you pop a nested dictionary value in Python?

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