Destructuring-bind dictionary contents

Question

I am trying to \'destructure\' a dictionary and associate values with variables names after its keys. Something like

params = {\'a\':1,\'b\':2}
a,b = params.         


        

Answer 1

Python is only able to "destructure" sequences, not dictionaries. So, to write what you want, you will have to map the needed entries to a proper sequence. As of myself, the closest match I could find is the (not very sexy):

a,b = [d[k] for k in ('a','b')]

This works with generators too:

a,b = (d[k] for k in ('a','b'))

Here is a full example:

>>> d = dict(a=1,b=2,c=3)
>>> d
{'a': 1, 'c': 3, 'b': 2}
>>> a, b = [d[k] for k in ('a','b')]
>>> a
1
>>> b
2
>>> a, b = (d[k] for k in ('a','b'))
>>> a
1
>>> b
2