How to map dict into another dict Python

by

You can use a defaultdict as follow:

class Account:
    def __init__(self, x, y):
        self.x = x
        self.y = y

d_in = {0: Account(13, 1), 1: Account(15, 5), 2: Account(55, 1), 3: Account(33 ,1)} 
d_out = collections.defaultdict(list)

for index, k in enumerate(d_in.keys()):
    d_out[d_in[k].y].append(index)

print d_out

Giving the following output:

defaultdict(<type 'list'>, {1: [0, 2, 3], 5: [1]})

If you really want it to look like a regular dict then:

print dict(d_out)

Giving:

{1: [0, 2, 3], 5: [1]}

More Related Contents:

  1. Using lambda function in python
  2. Are dictionaries ordered in Python 3.6+?
  3. Python Dictionary Comprehension
  4. Django template how to look up a dictionary value with a variable
  5. What is the difference between dict.items() and dict.iteritems() in Python2?
  6. Use cases for the ‘setdefault’ dict method
  7. Merging two CSV files using Python
  8. Time complexity of accessing a Python dict
  9. Python variables as keys to dict
  10. How do I check that multiple keys are in a dict in a single pass?
  11. How do I print the key-value pairs of a dictionary in python
  12. Converting Dictionary to List? [duplicate]
  13. How to find the min/max value of a common key in a list of dicts?
  14. Converting a list of tuples into a dict
  15. Python Dictionary to CSV
  16. How to use dot notation for dict in python?
  17. How to sort IP addresses stored in dictionary in Python?
  18. Unpack dictionary from Pandas Column
  19. Change values in dict of nested dicts using items in a list?
  20. Updating a dictionary in python
  21. Dictionary best data structure for train routes?
  22. Recursive diff of two dictionaries (keys and values)?
  23. Mapping over values in a python dictionary
  24. Using python map and other functional tools
  25. A python class that acts like dict
  26. Find dictionary keys with duplicate values
  27. How can I get dictionary key as variable directly in Python (not by searching from value)?
  28. How expensive are Python dictionaries to handle?
  29. What are dict_keys, dict_items and dict_values?
  30. How do I re-map python dict keys

Leave a Comment