Parsing a python string into a JSON file

Question

I need to parse a string from a python function into json.dump() but I can’t find a solution to remove the quotation marks from the string after it’s written into the JSON.

I have this:

"[{'number1':1, 'number2': 2, 'number3': 3, 'word1': 'word'},{'number1':2, 'number2': 2, 'number3': 3, 'word1': 'word'}]"

And I need this:

[{'number1':1, 'number2': 2, 'number3': 3, 'word1': 'word'},{'number1':2, 'number2': 2, 'number3': 3, 'word1': 'word'}]

I tried to strip it using str.strip('""') but the quotation marks stay and a few different things from other threads similar to my problem but none have worked

Is there a way to accomplish what I am trying to do or is that impossible?

Code:

def batchStr(batchIds, count1, count2 ,status):
    seg1 = "{'batchId':"
    seg2 = ",  'source1count': "
    seg3 = ",  'source2count': "
    seg4 = ", 'status':"
    seg5 = "},"
    str1 = "["
    for id in range(len(batchIds)):
        str2 = str(seg1)+str(batchIds[id])+str(seg2)+str(count1[id])+str(seg3)+str(count2[id]+str(seg4)+str(status[id])+str(seg5)
        str1 = str(str1) + str(str2)
    str1 = str1[:-1]+"]"
    return str1

I want it to output to the JSON like that:

[{'batchId':1,  'source1count': 100,  'source2count': 100, 'status':success},...]

But it outputs:

"[{'batchId':1,  'source1count': 100,  'source2count': 100, 'status':success},...]"

Asked By: Bartus

||

Source

Answer 1

You should convert your list in string format to list first, try using eval(list).
Then, you could do json.dumps(list) and write it into the file.

Answered By: Yuqi Wang

Answer 2

To use the strip string function you need the backslash escape character for the quotation character.

str = "[{'number1':1, 'number2': 2, 'number3': 3, 'word1': 'word'},{'number1':2, 'number2': 2, 'number3': 3, 'word1': 'word'}]" 
solution = str.strip('"')
print(solution)

Or you can use RE regular expression.

Answered By: Ricky S

Answer 3

It seems the quotemarks you are seeing are just python informing you that the data you are displaying is a string (this will happen if you are using the repl or a jupyter notebook).

Regardless, here is a cleaned up version of your code that outputs what you are looking for

import json

def batchStr(batchIds, count1, count2 ,status):
    json_array = [
        dict(
            batchId=bid,
            source1count=c1,
            source2count=c2,
            status=s
        )
        for bid, c1, c2, s in
        zip(batchIds, count1, count2, status)
    ]
    return json.dumps(json_array)

print(batchStr([1,2,3], [100]*3, [200]*3, ["success"]*3))

Outputs:

[{"batchId": 1, "source1count": 100, "source2count": 200, "status": "success"}, {"batchId": 2, "source1count": 100, "source2count": 200, "status": "success"}, {"batchId": 3, "source1count": 100, "source2count": 200, "status": "success"}]

Answered By: pigeonhands

Parsing a python string into a JSON file

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