WebApr 11, 2024 · The Python TypeError: unhashable type: 'dict' can be fixed by casting a dictionary to a hashable object such as tuple before using it as a key in another dictionary: my_dict = {1: 'A', tuple({2: 'B', 3: 'C'}): 'D'} print(my_dict) In the example above, the tuple() function is used to convert the dictionary to a tuple. The above code runs ... WebAug 21, 2024 · Method #1 : Using tuple () The simple type casting of dictionary into a tuple in fact does the required task. This function takes just the keys and converts them into key tuple as required. Python3 test_dict = {'Gfg' : 1, 'is' : 2, 'best' : 3} print("The original dictionary is : " + str(test_dict)) res = tuple(test_dict)

Python Unpacking dictionary keys into tuple

WebApr 6, 2024 · Here is an example of how to use itertools.groupby to achieve this: Python3 from itertools import groupby def convert_to_dict (tuple_list): groups = groupby (tuple_list, key=lambda x: x [0]) dictionary = {} for key, group in groups: dictionary [key] = [tuple[1] for tuple in group] return dictionary WebApr 5, 2024 · Initialize the dictionary. Use the sorted() function with a lambda function to sort the dictionary items based on the second element of the tuple values. Get the last item (i.e., the item with the highest second element) from the sorted dictionary. Extract the key from the item. Print the key. Below is the implementation of the above approach: software help file crossword clue

Convert 2-tuple key in dictionary and add to a new dictionary as a ...

WebThe keys are like an index operator. In a list, the indexes are integers. In a dictionary, the keys can be any hashable objects such as numbers and strings; You can use dictionaryName[key] to retrieve a value in the dictionary for the given key and use dictionaryName[key] = value to add or modify an item in a dictionary WebAug 9, 2024 · Answer Yes, a tuple is a hashable value and can be used as a dictionary key. A tuple would be useful as a key when storing values associated with a grid or some other coordinate type system. The following code example shows a dictionary with keys representing a simple x,y grid system. WebBasically, insertion or getting one item on average is O (1). However, if adding keys, or searching for all keys, is the usual operation, your dict is flipped. You want: This way you can add keys with just mydict [value].append (newkey) and get all the keys with just mydict [value] and both will be on average O (1). software helisa