python: tuple of dictionary to Dictionary

Question

How can I convert tuple of dictionaries like example present below:

({(1, 2): 3},
 {(1, 3): 5},
 {(1, 4): 5},
 {(2, 4): 5},
 {(1, 5): 10},
 {(2, 6): 9},
 {(1         


        

Answer 1

You can't use a dict merge comprehension (yet), but you can go via a chain map:

>>> from collections import ChainMap
>>> dict(ChainMap(*dicts))
{(1, 1): 2,
 (1, 2): 3,
 (1, 3): 5,
 (1, 4): 5,
 (1, 5): 10,
 (1, 6): 9,
 (2, 1): 2,
 (2, 2): 3,
 (2, 3): 5,
 (2, 4): 5,
 (2, 5): 10,
 (2, 6): 9}

Note: collections.ChainMap is new in Python 3.3.

It's actually a subclass of collections.Mapping, so depending on the use-case you might not even need to convert back to a plain dict.