Any way to add two dict using python ?

Baburao

5y958Python

11 Replies

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Sagar Lad5y ago
https://www.geeksforgeeks.org/python-merging-two-dictionaries/
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Baburao5y ago
ok wait
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Rajanikant Hawaldar5y ago
I don’t think you can merge in that manner, try running the merge function, Then print(b), Return value of dict.update is None, but it makes the mutation.
>>> test = {"test": 1}
>>> test1 = {"test1": "2"}
>>> test.update(test1)
>>> print(test)
{'test': 1, 'test1': '2'}
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Baburao5y ago
def merge(dict1, dict2): return(dict2.update(dict1)) a = {'_id': '', 'First Name': 'Abc', 'Second Name': None} b = {'_id': '', 'First Name': 'Abc', 'Second Name': None} print(merge(a, b)) I used this, and got None printed
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Baburao5y ago
I want to return the all data in the flask return function Which I already have in db
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Rajanikant Hawaldar5y ago
But if you want to merge two dicts you have to write code to do that
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Baburao5y ago
Yea, I want to add them and get them in one variable.
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Rajanikant Hawaldar5y ago
No, what’s your goal, are you trying to combine two dicts into one?
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Baburao5y ago
dict.copy like that ?
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Rajanikant Hawaldar5y ago
I think you need a merge algorithm
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Harsh Shah5y ago
d1 = {'India': 'Delhi',
'Canada': 'Ottawa',
'United States': 'Washington D. C.'}
d2 = {'France': 'Paris',
'Malaysia': 'Kuala Lumpur'}

Method 1:Using the merge operator

d8 = d1 | d2
print(d8)
Output:
{'India': 'Delhi',
'Canada': 'Ottawa',
'United States': 'Washington D. C.',
'France': 'Paris',
'Malaysia': 'Kuala Lumpur'}

Method 2:Using unpacking operator

d5 = {**d1, **d2}
print(d5)
Output:
{'India': 'Delhi',
'Canada': 'Ottawa',
'United States': 'Washington D. C.',
'France': 'Paris',
'Malaysia': 'Kuala Lumpur'}

Method 3:Unpacking the second dictionary

d7 = dict(d1, **d2)
print(d7)
Output:
{'India': 'Delhi',
'Canada': 'Ottawa',
'United States': 'Washington D. C.',
'France': 'Paris',
'Malaysia': 'Kuala Lumpur'}
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