Remove an item from a dictionary when its key is unknown

Question

What is the best way to remove an item from a dictionary by value, i.e. when the item\'s key is unknown? Here\'s a simple approach:

for key, item in some_di         


        

Answer 1

c is the new dictionary, and a is your original dictionary, {'z','w'} are the keys you want to remove from a

c = {key:a[key] for key in a.keys() - {'z', 'w'}}

Also check: https://www.safaribooksonline.com/library/view/python-cookbook-3rd/9781449357337/ch01.html