How to transform an array to json object in python

Question

I would like to tranform an array to on object .

I have an array : ['BROOKLYN','STATEN ISLAND','OZONE PARK','SOUTH OZONE PARK', 'JAMAICA','OZONE PARK']

I am going to transofrm it to json object adding ":red" prefix .

colormap = {'NEW YORK': 'red', 'BROOKLYN': 'red', 'STATEN ISLAND': 'red', 'OZONE PARK':'red','SOUTH OZONE PARK':'red', 'JAMAICA':'red','OZONE PARK': 'red'}

How can I do that ?

It looks like you want to convert a list to a dictionary. How does this have anything to do with JSON? — Felix Kling
– Felix Kling, Commented Nov 27, 2013 at 4:57

Community · Accepted Answer · 2017-05-23 12:28:47Z

2

As I understand, you want to create a dict from your list. If so, you can do it like this:

colormap = {x:'red' for x in myList}

Afterwards, you can save it in json format using json module (please see a relevant question Storing Python dictionaries and documentation).

edited May 23, 2017 at 12:28

CommunityBot

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answered Nov 27, 2013 at 4:57

sashkello

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2 Comments

user3001937 Over a year ago

Thanks ! What is the best way to save it to json object (.to_JSON() )

sashkello Over a year ago

@user3001937 Please check out the edit for json info (has been asked a few times before - you can search other similar questions).

thefourtheye · Accepted Answer · 2013-11-27 04:59:25Z

0

You can use fromkeys method in the dictionary, like this
```
print {}.fromkeys(myArray, "set")
```

Or you can use zip like this

print dict(zip(myArray, ["set"] * len(myArray)))

Output

{'OZONE PARK': 'set', 'BROOKLYN': 'set', 'STATEN ISLAND': 'set', 'SOUTH OZONE PARK': 'set', 'JAMAICA': 'set'}

answered Nov 27, 2013 at 4:59

thefourtheye

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2 Comments

Ry- Over a year ago

dict.fromkeys seems like it would be the right way. ({}.fromkeys doesn’t have a lot of meaning.) But why bother with zip at all?

John La Rooy Over a year ago

dict.fromkeys is ideal since the value is immutable. The version with zip...why would you ruin a good answer with that?

Tim Wilder · Accepted Answer · 2013-11-27 05:13:05Z

0

import json

array = ["test", "test1", "test2"]

colors = {item: "red" for item in array}

json_str_colors = json.dumps(colors)

print(repr(json_str_colors))

answered Nov 27, 2013 at 5:13

Tim Wilder

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