/Python/How to reverse a dictionary in python

How to reverse a dictionary in python

Invert dictionary python

inv_map = {v: k for k, v in my_map.items()}

Source: stackoverflow.com

How to reverse a dictionary in python

def inverse_dict(my_dict):
    """
    the func get a dictinary and reverse it, the keys become values and the values become keys.
    :param my_dict: the dictinary that need to be reversed.
    :return: a VERY pretty dictionary.
    """
    result_dict = {}
    for key, value in my_dict.items():
        if not value in result_dict.keys():
            result_dict[value] = []
        result_dict[value].append(key)
    return result_dict, print(result_dict)

Reverse python dictionary

inv_map = {v: k for k, v in my_map.iteritems()}

Source: stackoverflow.com

How to reverse a dictionary in python

def inverse_dict(my_dict):
    """The function accepts a dictionary as a parameter.
    The function returns a new dictionary with "inverted" mapping:
    each key in the transmitted dictionary is a value in the returned dictionary
    and value entry in the transmitted dictionary is a key in the returned dictionary.
    :param my_dict: dictionary
    :type my_str: string
    :return: Dictionary
    :rtype: Dictionary
    """
    new_dict = {}                                   # create empty Dictionary
    for itm1 in my_dict.items():
        lst = []
        for itm2 in my_dict.items():
            if itm2[1] == itm1[1]:
                lst.append(itm2[0])
        new_dict[itm1[1]] = sorted(lst)

    return new_dict

Similar codes

37 votes247 views3 answers
Matplotlib set size
Python
0 vote251 views2 answers
Rotatelist in python
Python
2 votes256 views1 answer
CMake Error at 3rdparty/GLFW/CMakeLists.txt:236 (message): The RandR headers were not found
Python
0 vote255 views1 answer
Pandas read to a csv file
Python
8 votes214 views2 answers
Path to create a text file in python
Python
3 votes285 views6 answers
How to import nltk
Python
7 votes302 views6 answers
Bar plot python
Python
1 vote285 views1 answer
Convert seconds to hours python
Python
15 votes248 views3 answers
Get max value column pandas
Python
21 votes226 views10 answers
How to print in python
Python