/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

3 votes199 views1 answer
No module named 'django.core.urlresolvers'
Python
1 vote172 views2 answers
Changes not showing on website server odoo
Python
1 vote169 views1 answer
For each value in column pandas
Python
1 vote187 views1 answer
Python how to sort by date
Python
0 vote172 views1 answer
Spooling in os
Python
2 votes169 views1 answer
Firebase-admin python
Python
3 votes188 views1 answer
Python plot cut off when saving figure
Python
2 votes221 views2 answers
Mean deviation python
Python
3 votes179 views1 answer
Custom keyboard
Python
-2 votes168 views1 answer
Python IOError
Python