Python: Replace values in nested dictionary

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I want to replace the values (formated as strings) with the same values as integers, whenever the key is 'current_values'.

d = {'id': '10', 'datastreams': [{'current_value': '5'}, {'current_value': '4'}]}

Desired Output:

d = {'id': '10', 'datastreams': [{'current_value': 5}, {'current_value': 4}]}
d = {'id': '10', 'datastreams': [{'current_value': '5'}, {'current_value': '4'}]}

for elem in d['datastreams']:      # for each elem in the list datastreams
    for k,v in elem.items():       # for key,val in the elem of the list 
        if 'current_value' in k:   # if current_value is in the key
            elem[k] = int(v)       # Cast it to int


{'id': '10', 'datastreams': [{'current_value': 5}, {'current_value': 4}]}

python: replace strings in a nested dictionary, 2.0', '7zi', '7zi', 'ado 3.4'] ) by a single value (the last one processed in your loop). You just have to replace the inner loop by this single line to� Given two dictionaries, update the values from other dictionary if key is present in other dictionary. This is brute way in which this task can be performed. In this, we run a loop for each key in target dictionary and update in case the value is present in other dictionary. The original dictionary

A general approach (assuming you don't know in advance which key of the dict is pointing to a list) would be to iterate over the dict and check the type of its values and then iterate again into each value if needed.

In your case, your dictionary may contain a list of dictionaries as values, so it is enough to check if a value is of type list, if so, iterate over the list and change the dicts you need.

It can be done recursively with a function like the following:

def f(d):
    for k,v in d.items():
        if k == 'current_value':
            d[k] = int(v)
        elif type(v) is list:
            for item in v:
                if type(item) is dict:

>>> d = {'id': '10', 'datastreams': [{'current_value': '5'}, {'current_value': '4'}]}
>>> f(d)
>>> d
{'id': '10', 'datastreams': [{'current_value': 5}, {'current_value': 4}]}  

Python: Update Nested Dictionary, Nested Dictionary: The nested dictionaries in Python are nothing but dictionaries emp1, emp2 are keys that have another dictionary as their value. Now to make it interactive with the user, we can slightly modify the code� How to replace values of a Python dictionary? Python Programming Programming Scripts You can assign a dictionary value to a variable in Python using the access operator [].

Can be done with list comprehension:

d['datastreams'] = [{'current_value': int(ds['current_value'])} if ('current_value' in ds) else ds for ds in d['datastreams']]

How to update a Python nested dictionary, Once you select the key whose value is a dict, then just use another set of brackets to access the nested dict, like so: >>> nested_dict = { 'nested key' : 'nested val' } >>> d = { 'one': 'two', 'nested' : nested_dict } >>> d['nested']['nested key'] = 'new nested val' >>> d. The values ( nested dictionaries ) have different numbers of items. From 2 to 33. How can I change a certain value of a certain nested dictionary that have 25 items without rewriting the nested dictionary manually by using for example: nested_dict_1['user-1'] = 'sky' the dictionary looks like this:

You can use ast.literal_eval to evaluate the underlying value for items with current_value key in the d['datastreams'] list. Then check whether the type is an int using isinstance for such values. Finally, type cast such values to int.

import ast
d = {'id': '10', 'datastreams': [{'current_value': '5'}, {'current_value': '4'}]}
for i in d['datastreams']:
    for k,v in i.items():
        if 'current_value' in k and isinstance(ast.literal_eval(v),int):
            i[k] = int(v)
{'id': '10', 'datastreams': [{'current_value': 5}, {'current_value': 4}]}

How to change value in a nested dictionary?, I have a dictionary whose keys are strings and the values are other, nested dictionaries. The values ( nested dictionaries ) have different� This is known as nested dictionary. Nested dictionaries are one of many ways to represent structured information (similar to ‘records’ or ‘structs’ in other languages). Create a Nested Dictionary. A nested dictionary is created the same way a normal dictionary is created. The only difference is that each value is another dictionary.

You could use this method which would loop through checks for current_value in list and change it to integer by passing the value through int() function:

for value in d.values():
    for element in value:
        if 'current_value' in element:
            element['current_value'] = int(element['current_value'])

Find all occurences of a key in nested python dictionaries and lists , For Python 3.x users, just replace " for k, v in dictionary.iteritems():" with " for k, to get all contained keys of a nested iterable as a list (also for the values) as can� What is Nested Dictionary in Python? In Python, a nested dictionary is a dictionary inside a dictionary. It's a collection of dictionaries into one single dictionary. nested_dict = { 'dictA': {'key_1': 'value_1'}, 'dictB': {'key_2': 'value_2'}} Here, the nested_dict is a nested dictionary with the dictionary dictA and dictB. They are two

Python Nested Dictionary, To create a nested dictionary, simply pass dictionary key:value pair as keyword arguments to dict() Constructor. D = dict(emp1 = {'name': 'Bob', 'job� 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'}.

Python Nested Dictionary (With Examples), More specifically, you'll learn to create nested dictionary, access elements, modify them and so on with the help of examples. In Python, a dictionary is an� A Dictionary in Python works similar to the Dictionary in the real world. Keys of a Dictionary must be unique and of immutable data types such as Strings, Integers, and tuples, but the key-values can be repeated and be of any type.

Python Change Values in a Dictionary, Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, PHP, Python, Bootstrap, Java� I have to figure out a way to find the sum total of certain values in nested dictionaries first with a for loop and then within a single line using the sum function and dictionary comprehension. I CANNOT assume that the dictionaries are ordered nor are they the same size, but I can assume that the TARGET key:value pair for each nest has the same Key name.

  • What did you try so far?
  • The fact you are mixing list within dict could make it tricky.
  • @DirtyBit he's probably new to SO so scaring him off with negative reactions is not very inviting.
  • @JohnnyMcFly usually it is best to apply the principles defined in the MCVE guide by providing an example of the attempt you made to fix your issue. Keep in mind for the future.
  • sry folks, you are right, I will considers that in the future, thx!
  • This is the easiest answer.