CODEWITHSUNDEEP
pythonlistdictionarykey-value-store
greencar
greencar

Reputation: 315

converting dictionary values to list in Python

Suppose I have a dictionary (dict) with keys and values as below:

print(dict) 

{'AAA': {'', '111', '222'}, 'BBB': {'222', '999', '555'}}

I want to extract the values from the dictionary in the form of a single string, i.e. type(values) = str, such as:

values = '111', '222', '999', 555'

but what I am getting is below under dict.values():

dict.keys() 

dict_keys(['AAA', 'BBB'])

dict.values() 

dict_values([{'', '111', '222'}, {'222', '999', '555'}])

How can I achieve the required result?

Upvotes: 1

Views: 25270

Answers (6)

Aaditya Ura
Aaditya Ura

Reputation: 12669

You can try list comprehension in one line :

data={'AAA': {'', '111', '222'}, 'BBB': {'222', '999', '555'}}

print(set([k for i,j in data.items() for k in j if k]))

output:

{'222', '999', '111', '555'}

Upvotes: 0

Sphinx
Sphinx

Reputation: 10729

This is another way to do without import any module.

dict = {'AAA': {'', '111', '222'}, 'BBB': {'222', '999', '555'}}
result = []
print([[result.append(item) or item for item in one_set if item] for one_set in dict.values()])
print(','.join(result)) #all non '' elements
print(','.join(set(result))) #all non '' and non duplicated elements

Output:

[['222', '111'], ['222', '999', '555']]
222,111,222,999,555
222,999,555,111
[Finished in 0.181s]

Upvotes: 0

kmartin
kmartin

Reputation: 194

Just use extend method:

values = []
for key in some_dict:
    values.extend(list(some_dict[key]))

If you need to delete the empty strings, use:

values = list(filter(None, values))

See this SE entry

Then you can convert it to a tuple if you wish :)

Upvotes: 0

Anshul Goyal
Anshul Goyal

Reputation: 76907

You can use itertools.chain to do this:

In [92]: from itertools import chain

In [93]: dct = {'AAA': {'', '111', '222'}, 'BBB': {'222', '999', '555'}}

In [94]: {x for x in chain(*dct.values()) if x}
Out[94]: {'111', '222', '555', '999'}

If you want to convert this output to a single string, just use an str() call on it, or use ", ".join(x for x in chain(*dct.values()) if x)

Upvotes: 5

user9588242
user9588242

Reputation:

Do you want something like

d = dict()
d[0] = '0'
str(d)

?

String manipulations are fairly straightforward after that

Upvotes: 0

rahlf23
rahlf23

Reputation: 9019

I believe this is what you are after if you want them output as a single string:

mydict = {'AAA': {'', '111', '222'}, 'BBB': {'222', '999', '555'}}

out = []
for keys, values in mydict.items():
    [out.append(i) for i in values if i!='']

out = ','.join(set(out))

print(out)

print(type(out))

Outputs:

555,222,111,999

<class 'str'>

Upvotes: 0

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