How to combine each elements in set of dictionary in a list to other set of dictionary list?

Question

suppose if two dictionary list are

l1 = [{'name': '1st Match - Sri Lanka v India', 'place': 'R Premadasa Stadium, Colombo'}, {'name': '2nd Match - Bangladesh v India', 'place': 'R Premadasa Stadium, Colombo'}, {'name': '3rd Match - Sri Lanka v Bangladesh', 'place': 'R Premadasa Stadium, Colombo'}, {'name': '4th Match - Sri Lanka v India', 'place': 'R Premadasa Stadium, Colombo'}, {'name': '5th Match - Bangladesh v India', 'place': 'R Premadasa Stadium, Colombo'}, {'name': '6th Match - Sri Lanka v Bangladesh', 'place': 'R Premadasa Stadium, Colombo'}, {'name': 'Final - TBC v TBC', 'place': 'R Premadasa Stadium, Colombo'}]
l2 = [{'date': 'Tue Mar 6'}, {'date': 'Thu Mar 8'}, {'date': 'Sat Mar 10'}, {'date': 'Mon Mar 12'}, {'date': 'Wed Mar 14'}, {'date': 'Fri Mar 16'}, {'date': 'Sun Mar 18'}]

I want to combine element in l2 to elements of l1 like as follow.

 L3 = [{'name': '1st Match - Sri Lanka v India', 'place': 'R Premadasa Stadium, Colombo','date': 'Tue Mar 6'}, {'name': '2nd Match - Bangladesh v India', 'place': 'R Premadasa Stadium, Colombo','date': 'Thu Mar 8'}, {'name': '3rd Match - Sri Lanka v Bangladesh', 'place': 'R Premadasa Stadium, Colombo','date': 'Sat Mar 10'}, {'name': '4th Match - Sri Lanka v India', 'place': 'R Premadasa Stadium, Colombo','date': 'Mon Mar 12'}, {'name': '5th Match - Bangladesh v India', 'place': 'R Premadasa Stadium, Colombo','date': 'Wed Mar 14'}, {'name': '6th Match - Sri Lanka v Bangladesh', 'place': 'R Premadasa Stadium, Colombo','date': 'Fri Mar 16'}, {'name': 'Final - TBC v TBC', 'place': 'R Premadasa Stadium, Colombo','date': 'Sun Mar 18'}]

which function can I use to do this?

Possible duplicate of [How to merge two dictionaries in a single expression?](https://stackoverflow.com/questions/38987/how-to-merge-two-dictionaries-in-a-single-expression) — Rockybilly, Mar 07 '18 at 12:00
There are several correct answers, please accept one of them. — Xebax, Mar 07 '18 at 12:12

Vasilis G. · Answer 1 · 2018-03-07T12:41:50.907

You can do it this way:

l1 = [{'name': '1st Match - Sri Lanka v India', 'place': 'R Premadasa Stadium, Colombo'}, {'name': '2nd Match - Bangladesh v India', 'place': 'R Premadasa Stadium, Colombo'}, {'name': '3rd Match - Sri Lanka v Bangladesh', 'place': 'R Premadasa Stadium, Colombo'}, {'name': '4th Match - Sri Lanka v India', 'place': 'R Premadasa Stadium, Colombo'}, {'name': '5th Match - Bangladesh v India', 'place': 'R Premadasa Stadium, Colombo'}, {'name': '6th Match - Sri Lanka v Bangladesh', 'place': 'R Premadasa Stadium, Colombo'}, {'name': 'Final - TBC v TBC', 'place': 'R Premadasa Stadium, Colombo'}]
l2 = [{'date': 'Tue Mar 6'}, {'date': 'Thu Mar 8'}, {'date': 'Sat Mar 10'}, {'date': 'Mon Mar 12'}, {'date': 'Wed Mar 14'}, {'date': 'Fri Mar 16'}, {'date': 'Sun Mar 18'}]

res = [{**d[0],**d[1]} for d in zip(l1,l2)]
print(res)

Output:

[{'name': '1st Match - Sri Lanka v India', 'place': 'R Premadasa Stadium, Colombo', 'date': 'Tue Mar 6'}, {'name': '2nd Match - Bangladesh v India', 'place': 'R Premadasa Stadium, Colombo', 'date': 'Thu Mar 8'}, {'name': '3rd Match - Sri Lanka v Bangladesh', 'place': 'R Premadasa Stadium, Colombo', 'date': 'Sat Mar 10'}, {'name': '4th Match - Sri Lanka v India', 'place': 'R Premadasa Stadium, Colombo', 'date': 'Mon Mar 12'}, {'name': '5th Match - Bangladesh v India', 'place': 'R Premadasa Stadium, Colombo', 'date': 'Wed Mar 14'}, {'name': '6th Match - Sri Lanka v Bangladesh', 'place': 'R Premadasa Stadium, Colombo', 'date': 'Fri Mar 16'}, {'name': 'Final - TBC v TBC', 'place': 'R Premadasa Stadium, Colombo', 'date': 'Sun Mar 18'}]

You can take a look here to see how to merge dictionaries.

you don't need `list(zip(l1, l2))`. See my answer. – Rahul Mar 07 '18 at 12:14 — Rahul, Mar 07 '18 at 12:14

score 2 · Answer 2 · answered Mar 07 '18 at 11:57

This should help.

l1 = [{'name': '1st Match - Sri Lanka v India', 'place': 'R Premadasa Stadium, Colombo'}, {'name': '2nd Match - Bangladesh v India', 'place': 'R Premadasa Stadium, Colombo'}, {'name': '3rd Match - Sri Lanka v Bangladesh', 'place': 'R Premadasa Stadium, Colombo'}, {'name': '4th Match - Sri Lanka v India', 'place': 'R Premadasa Stadium, Colombo'}, {'name': '5th Match - Bangladesh v India', 'place': 'R Premadasa Stadium, Colombo'}, {'name': '6th Match - Sri Lanka v Bangladesh', 'place': 'R Premadasa Stadium, Colombo'}, {'name': 'Final - TBC v TBC', 'place': 'R Premadasa Stadium, Colombo'}]
l2 = [{'date': 'Tue Mar 6'}, {'date': 'Thu Mar 8'}, {'date': 'Sat Mar 10'}, {'date': 'Mon Mar 12'}, {'date': 'Wed Mar 14'}, {'date': 'Fri Mar 16'}, {'date': 'Sun Mar 18'}]

l3 = []
for i in zip(l1, l2):
    val = i[0]
    val.update((i[1]))
    l3.append(val)
print l3

Output:

[{'date': 'Tue Mar 6', 'place': 'R Premadasa Stadium, Colombo', 'name': '1st Match - Sri Lanka v India'}, {'date': 'Thu Mar 8', 'place': 'R Premadasa Stadium, Colombo', 'name': '2nd Match - Bangladesh v India'}, {'date': 'Sat Mar 10', 'place': 'R Premadasa Stadium, Colombo', 'name': '3rd Match - Sri Lanka v Bangladesh'}, {'date': 'Mon Mar 12', 'place': 'R Premadasa Stadium, Colombo', 'name': '4th Match - Sri Lanka v India'}, {'date': 'Wed Mar 14', 'place': 'R Premadasa Stadium, Colombo', 'name': '5th Match - Bangladesh v India'}, {'date': 'Fri Mar 16', 'place': 'R Premadasa Stadium, Colombo', 'name': '6th Match - Sri Lanka v Bangladesh'}, {'date': 'Sun Mar 18', 'place': 'R Premadasa Stadium, Colombo', 'name': 'Final - TBC v TBC'}]

score 2 · Accepted Answer · answered Mar 07 '18 at 12:04

2

res = [{**x, **y} for x, y in zip(l1, l2)]

answered Mar 07 '18 at 12:04

Rahul

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your answer worked for me thanks, for others I was getting TypeError: 'ResultSet' object is not callable – Mar 07 '18 at 13:43

Jay Shankar Gupta · Answer 4 · 2018-03-07T12:57:44.800

l1 = [{'name': '1st Match - Sri Lanka v India', 'place': 'R Premadasa Stadium, Colombo'}, {'name': '2nd Match - Bangladesh v India', 'place': 'R Premadasa Stadium, Colombo'}, {'name': '3rd Match - Sri Lanka v Bangladesh', 'place': 'R Premadasa Stadium, Colombo'}, {'name': '4th Match - Sri Lanka v India', 'place': 'R Premadasa Stadium, Colombo'}, {'name': '5th Match - Bangladesh v India', 'place': 'R Premadasa Stadium, Colombo'}, {'name': '6th Match - Sri Lanka v Bangladesh', 'place': 'R Premadasa Stadium, Colombo'}, {'name': 'Final - TBC v TBC', 'place': 'R Premadasa Stadium, Colombo'}]
l2 = [{'date': 'Tue Mar 6'}, {'date': 'Thu Mar 8'}, {'date': 'Sat Mar 10'}, {'date': 'Mon Mar 12'}, {'date': 'Wed Mar 14'}, {'date': 'Fri Mar 16'}, {'date': 'Sun Mar 18'}]
print(list(zip(l1,l2)))
l3=[]
for i in zip(l1,l2):
 d=i[0] 
 d.update(i[1]) 
 l3.append(d)
print(l3)

i[0] is {'name': '1st Match - Sri Lanka v India', 'place': 'R Premadasa Stadium, Colombo'}

i[1] is {'date': 'Tue Mar 6'}

Output for

print(list(zip(l1,l2)))

[({'name': '1st Match - Sri Lanka v India', 'place': 'R Premadasa Stadium, Colombo'}, {'date': 'Tue Mar 6'}), ({'name': '2nd Match - Bangladesh v India', 'place': 'R Premadasa Stadium, Colombo'}, {'date': 'Thu Mar 8'}), ({'name': '3rd Match - Sri Lanka v Bangladesh', 'place': 'R Premadasa Stadium, Colombo'}, {'date': 'Sat Mar 10'}), ({'name': '4th Match - Sri Lanka v India', 'place': 'R Premadasa Stadium, Colombo'}, {'date': 'Mon Mar 12'}), ({'name': '5th Match - Bangladesh v India', 'place': 'R Premadasa Stadium, Colombo'}, {'date': 'Wed Mar 14'}), ({'name': '6th Match - Sri Lanka v Bangladesh', 'place': 'R Premadasa Stadium, Colombo'}, {'date': 'Fri Mar 16'}), ({'name': 'Final - TBC v TBC', 'place': 'R Premadasa Stadium, Colombo'}, {'date': 'Sun Mar 18'})]

print(l3)

[{'name': '1st Match - Sri Lanka v India', 'place': 'R Premadasa Stadium, Colombo', 'date': 'Tue Mar 6'}, {'name': '2nd Match - Bangladesh v India', 'place': 'R Premadasa Stadium, Colombo', 'date': 'Thu Mar 8'}, {'name': '3rd Match - Sri Lanka v Bangladesh', 'place': 'R Premadasa Stadium, Colombo', 'date': 'Sat Mar 10'}, {'name': '4th Match - Sri Lanka v India', 'place': 'R Premadasa Stadium, Colombo', 'date': 'Mon Mar 12'}, {'name': '5th Match - Bangladesh v India', 'place': 'R Premadasa Stadium, Colombo', 'date': 'Wed Mar 14'}, {'name': '6th Match - Sri Lanka v Bangladesh', 'place': 'R Premadasa Stadium, Colombo', 'date': 'Fri Mar 16'}, {'name': 'Final - TBC v TBC', 'place': 'R Premadasa Stadium, Colombo', 'date': 'Sun Mar 18'}]

Oh! its simple as that thanks @jayshankargupta, is this the effective way to do or there any other method to do? — , Mar 07 '18 at 11:58
This does not answer the question. The OP wants 'name', 'place' and 'date' in the same dictionary. — Xebax, Mar 07 '18 at 12:07

score -1 · Answer 5 · edited Mar 07 '18 at 14:35

-1

Code:

L3 = [dict(a.items() + b.items()) for a,b in zip(L1,L2)]

edited Mar 07 '18 at 14:35

Dherik

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answered Mar 07 '18 at 13:20

Raj Vardhan Singh Bhati

1

How to combine each elements in set of dictionary in a list to other set of dictionary list?

5 Answers5