Python Concat Two Dictionaries with comma

Question

If I have two dicts in python

d1={1:2,3:4}
d2={5:6,7:9}

How can I combine that to make

d2 = {{1:2,3:4}, {5:6,7:9}}

Look into `numpy` (structured arrays, aka record arrays) and use either the `concatenate` or `vstack` function — The Brofessor, Aug 04 '15 at 02:15
To clarify, do you want to combine into one dictionary (i.e.: `d2 = {1:2,3:4,5:6,7:9}`), or make `d2` a dictionary of two dictionaries? — The Brofessor, Aug 04 '15 at 02:21
`d2 = {{1:2,3:4}, {5:6,7:9}}` is not valid Python. Do you mean `d2 = [{1:2,3:4}, {5:6,7:9}]`, `d2 = "{{1:2,3:4}, {5:6,7:9}}"`, `d2 = {9:{1:2,3:4}, 10:{5:6,7:9}}`, what @TheBrofessor said...? — Amadan, Aug 04 '15 at 02:21

score 1 · Answer 1 · answered Aug 04 '15 at 04:49

1

Your request for d2 is not actually a dictionary, but a list. Dictionaries contain key-value pairs. d2 = {{1:2,3:4}, {5:6,7:9}} won't even work I don't think. d2 = [{1:2, 3:4}, {5:6, 7:9}] would likely work, and be easier to pull information from.

answered Aug 04 '15 at 04:49

Connor

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6

score 1 · Accepted Answer · answered Aug 04 '15 at 13:39

As @Amadan has already suggested, you seem to be wanting a list of two items holding d1 and d2. This can be easily created using the following:

d1 = {1:2,3:4}
d2 = {5:6,7:9}

mylist = [d1, d2]

print mylist

This would display the items as follows:

[{1: 2, 3: 4}, {5: 6, 7: 9}]

You could then iterate through each dictionary as follows:

for d in list_of_d1_d2:
    for k, v in d.items():
        print "{}: {}".format(k,v)
    print

This would display:

Tested using Python 2.7

Python Concat Two Dictionaries with comma

2 Answers2