Python return with multiple dictionaries from a function

Question

my problem is that I have two function and one of it's return value is two dictionaries in the following way:

def fnct1():
    return dict1, dict2

so it's returning into my other function which return value is the two dictionaries from the previous function and also a new dictionary, so something like this

 def fnct2():
     return dict3, fnct(1)

the problem with this is that is has the following result:

({dict3},({dict1},{dict2})

but I want it to look the following way:

({dict3},{dict1},{dict2})

could you show the code you've come up with? also, the help centre has some info on the correct formatting for code. — marcellothearcane
– marcellothearcane, Commented Jun 20, 2017 at 13:34
Sorry for the bad formatting I will be more careful in the future — Kiftau
– Kiftau, Commented Jun 20, 2017 at 13:54

Mike Scotty · Accepted Answer · 2017-06-20 13:42:13Z

5

Since your function returns a tuple, you need to either return the individual tuple items, or unpack them:

def fnct1():
    dict1 = { "name": "d1" }
    dict2 = { "name": "d2" }
    return dict1, dict2

def fnct2():
    dict3 = { "name": "d3" }
    res = fnct1() 
    return dict3, res[0], res[1] # return the individual tuple elements

# alternative implementation of fnct2:
def fnct2():
    dict3 = { "name": "d3" }
    d1, d2 = fnct1() # unpack your tuple
    return dict3, d1, d2

print(fnct2())
# Output: ({'name': 'd3'}, {'name': 'd1'}, {'name': 'd2'})

answered Jun 20, 2017 at 13:42

Mike Scotty

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2 Comments

Kiftau Over a year ago

Thanks for the answer that was what I was looking for, or is there any way to add dict3 into the tuple instead of unpacking the two what are already there?

kyriakosSt Over a year ago

@Klftau Tuples are immutable so you cannot change them, however you can add tuples together (in a new tuple) to imitate this behavior. Try return (dict3,) + fnct1().

kyriakosSt · Accepted Answer · 2017-06-20 13:38:53Z

5

You could unpack the values from fnct1() before returning them:

def fnct2():
    dict1, dict2 = fnct1()
    return dict3, dict1, dict2

answered Jun 20, 2017 at 13:38

kyriakosSt

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Comments

Captin Fire · Accepted Answer · 2017-06-20 13:36:53Z

2

If you say the returned value of the 1st function is a. In the 2nd just return a[0], a[1], otherDict.

answered Jun 20, 2017 at 13:36

Captin Fire

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