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I am trying to merge the following python dictionaries as follow:
dict1= {'paul':100, 'john':80, 'ted':34, 'herve':10} dict2 = {'paul':'a', 'john':'b', 'ted':'c', 'peter':'d'} output = {'paul':[100,'a'], 'john':[80, 'b'], 'ted':[34,'c'], 'peter':[None, 'd'], 'herve':[10, None]} Is there an efficient way to do this?
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Using | in Python 3.9 In the latest update of python now we can use “|” operator to merge two dictionaries. It is a very convenient method to merge dictionaries.
Merge two dictionaries using Copy() and Update() Method In this method, we copy all the elements of the first dictionary (d1) elements using the copy() function and then assign the copied data into the other dictionary (d3). After that, we update the dictionary d3 with the d2 dictionary using the update() function.
To merge two dictionaries d1 and d2, create deepcopy(d1) as d and then do the update method. In this way, the original dictionary will not be modified.
output = {k: [dict1[k], dict2.get(k)] for k in dict1} output.update({k: [None, dict2[k]] for k in dict2 if k not in dict1}) This will work:
{k: [dict1.get(k), dict2.get(k)] for k in set(dict1.keys() + dict2.keys())} Output:
{'john': [80, 'b'], 'paul': [100, 'a'], 'peter': [None, 'd'], 'ted': [34, 'c'], 'herve': [10, None]} If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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