CODEWITHSUNDEEP
pythonjsonif-statement
CDNthe2nd
CDNthe2nd

Reputation: 369

Python - If json element is "not valid", try the other one

So I have been playing around with Json and Python and basically I have a Json file where sometimes some elements are not included and sometimes it is. Basically what I want to do is that check if the first element that contains "ImageUrl" is there and is valid then use that element, Else use the other imageURL

"threads": [{
    "id": "3a64a3b18894fb70c92b6382a1e8f735320c1cbb",
    "product": {
        "imageUrl": "https://hello.com/555088_401.JPG",
    },
    "imageUrl": "https://hello.com/images/555088_401.JPG",
}]

However it can happen that the first ImageURL can contain 999999_999 at the end and that is counted as invalid aswell.

What I have done so far is:

resp = s.get(url)
item = resp.json()['threads']    

itempic = item.get('imageUrl')  # Check if there is sell date
if itempic:
   image = str(item['imageUrl'])  # Image pic          
else:
   print('Picture not found')

which currently only take the second url imageUrl which is not what I want but it does work (also it check if the imageUrl contains anything aswell), The question is:

How can I take the first imageUrl element and check if it is "valid" and does not contains 999999_999 at the end (If it is valid and correct then use it and print) else If it is not "valid" then use the second imageUrl

Upvotes: 0

Views: 156

Answers (1)

chepner
chepner

Reputation: 531145

You just need to check whatever value you get back for 999999_999. It's simpler if you use the get method to "pretend" that a missing URL is a string that will match.

# This assumes that you want the top-level imageURL in preference to
# the product imageURL...
def get_url(d):
    for item in d['threads'], d['threads']['product']:
        url = item.get('imageUrl', '999999_999')
        if not re.match('999999_999', url):
            return url

As you can see, it's also simpler to just pretend that the second try could match 999999_999, even if you know it won't.

Upvotes: 1

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