Parsing Json array from an object in python

Question

Sorry for the vague title, this is a basic question. I have a json(more of a dict) which looks like this.

{
     'The Runaway Dinosaur': 
                            ['11th May 2016 ', ' 12:00am'],
     'Paradox':
                            ['12th Oct 2016 ', ' 12:00am'], 
     'Gorilla Warfare': 
                            ['18th Nov 2015 ', ' 1:00am'], 
     'Trajectory': 
                            ['23rd Mar 2016 ', ' 12:00am']
}

So each json object has an array of 2 elements, i want to extract the first element of each object.

I tried the following:-

for a in d: #d is the dict where the json is residing
    print a[0]

Expected o/p :- 11th May 2016, 12th Oct 2016 ,...

Actual o/p :- T P G T R T F E R T P T T T K M P G F T V F O T T F T R R P F W G R T I S B C K S A F L T F I C T F T E M F W T

I want to know what mistake am I making & how to rectify it?

Yevhen Kuzmovych · Accepted Answer · 2016-11-24 21:28:59Z

1

When you try to iterate through dict you actually iterate through keys (which are strings so you get first character of each string-key) . And you need values. So:

for a in d.values():
    print a[0]

answered Nov 24, 2016 at 21:28

Yevhen Kuzmovych

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1 Comment

penta Over a year ago

Ah ! I knew it that I was making a basic mistake, thanks, will accept the answer

user1781434 · Accepted Answer · 2016-11-24 21:33:33Z

1

As Yevhen answered, when you iterate over a dict as follows

for item in some_dict:

each item is a key of the dictionary. The order is unspecified.

Therefore, with a[0], you are selecting the first letter of the string that is the key of the dict.

You have .items() (or .iteritems() in Python 2), and .values() (or .itervalues() in Pyhton 2) to choose from.

E.g.,

for key, value in some_dict.items():
    print(value[0])

Note that you might get an exception thrown on value[0] if the returned JSON has an empty array somewhere as value.

answered Nov 24, 2016 at 21:33

user1781434

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