Python 从 JSON 读取逗号分隔列表

Question

I have the following JSON structure given in a python script:

print("Producers: ", metadata['plist']['dict']['array'][2]['dict']['string'])

The Problem is that I don't have a single entry on that field, instead I have multiple ones. Please also see the RAW JSON here: https://pastebin.com/rtTgmwvn

How can I pull out these entries as a comma separated string for [2] which is the producers field?

Thanks in advance

Answer 1

You're almost there:

you can do something like this

print("Producers: ", ", ".join(i["string"] for i in metadata['plist']['dict']['array'][2]['dict'])

to break down the solution... your "dict" element in the JSON is actually a list of " dict ", and therefore you can simply iterate over this list :

metadata['plist']['dict']['array'][2]['dict']

where each element is an actual dict with a "string" key.

Update

The format of the JSON is so tahat in some cases it is a list, and in some cases it is a single element. In that case, I would suggest writing a small function or use an if statement that handles each situation:

def get_csv(element):
    if isinstance(element, dict):
        return element["string"]
    return ", ".join(i["string"] for i in element)

# and you would use it like so:
print("Producers: ", get_csv(metadata['plist']['dict']['array'][2]['dict']))

Answer 2

The following should do the trick:

def get_producer_csv(data):
    producers = []
    dict = data["plist"]["dict"]["array"][2]["dict"]
    for dict_entry in dict:
        producers.append(dict_entry["string"])
    return ",".join(producers)

For your example, it returns the following: "David Heyman,David Barron,Tim Lewis"