Tag: dictionary

Getting Key in Nested Dictionary

I have a dictionary like this: Now I want to extract the key whenever a value from that key is searched. For example if user inputs mango it should print fruit How can I do this? Answer There is no way to directly do this to my knowledge, but you can try an iterative approach over the dictionary’s value…

how to add file names into dictionary based on their prefix?

dictionary python

I have a following problem. I have a list containing file names: I need to add them into dictionary based on their prefix number, i.e. 12 and 23. Each value of the dictionary should be a list containing all files with the same prefix. Desired output is: What I tried so far: However this gives me the result {&…

Modeling a dictionary as a queryable data object in python

database-design dictionary python

I have a simple book catalog dictionary as the following Each book is a string key in the dictionary. A book contains a single title, and possibly has many authors (often just one). An author is made of two strings, firstname and lastname. Also we can associate many tags to a book as novel, literature, art, 1…

How to merge two nested dictionaries in python, which have same keys and have array type values?

arrays dictionary nested python

I need to merge two dictionaries d1 and d2, where: I need dictionary d3 after merging d1 and d2, such that, 1st value of key:0 of d1 is merged with 1st value of key:0 of d2. Expecting d3 as: I have tried multiple approaches, but nothing seems to work appropriately. Any help is much appreciated! Thanks! Answer…

Using eval within a dict

dictionary eval python

I want to evaluate the value of a dict key, using the dict itself. For example: When I do this it includes a bunch of unnecessary stuff in the dict. In the above example it prints: Instead, in the above example I just want: How to resolve this issue? Thank you! Answer Pass a copy of dict to eval(): Prints:

How to create a pandas dataframe from a nested dictionary with lists of dictionaries?

dictionary pandas python

I have a dictionary like that: I want to construct a dataframe where I can see user1 and user2 as indices, product1, product2 and product3 as columns and values of these products should be values of columns. I tried looking here and found this post Construct pandas DataFrame from items in nested dictionary, b…

Replace a value in a nested dictionary by following a certain path to value in Python

dictionary nested python

I have a nested dictionary that I’m trying to replace a given value of a key using a path made up of keys to that particular value. Basic Example: I’ve found a function here on Stackoverflow, but it recursively replaces all values in the dict which I don’t want. Any help would be appreciated…

Sort a list by value of a dict python

dictionary python selection sorting

I need some help, how to use the algorithm selection sort to sort a list by the values of a dict. I wrote some code but I don’t know how continue, that the code work. e.g. sort the list by the values of the dict Answer New Answer Create class selection_sort which has get_sorted() method that will sort t…