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How to convert a list of numbers to jsonarray in Python

stackoverflow.com › questions › 19795012 › how-to-convert-a-list-of-numbers-to-jsonarray-in-python

Use the json module to produce JSON output:

import json

with open(outputfilename, 'wb') as outfile:
    json.dump(row, outfile)

This writes the JSON result directly to the file (replacing any previous content if the file already existed).

If you need the JSON result string in Python itself, use json.dumps() (added s, for 'string'):

json_string = json.dumps(row)

The L is just Python syntax for a long integer value; the json library knows how to handle those values, no L will be written.

Demo string output:

>>> import json
>>> row = [1L,[0.1,0.2],[[1234L,1],[134L,2]]]
>>> json.dumps(row)
'[1, [0.1, 0.2], [[1234, 1], [134, 2]]]'

Answer from Martijn Pieters on Stack Overflow

Stack Overflow

stackoverflow.com › questions › 19795012 › how-to-convert-a-list-of-numbers-to-jsonarray-in-python

json - How to convert a list of numbers to jsonarray in Python - Stack Overflow

Top answer

1 of 2

125

Use the json module to produce JSON output:

import json

with open(outputfilename, 'wb') as outfile:
    json.dump(row, outfile)

This writes the JSON result directly to the file (replacing any previous content if the file already existed).

If you need the JSON result string in Python itself, use json.dumps() (added s, for 'string'):

json_string = json.dumps(row)

The L is just Python syntax for a long integer value; the json library knows how to handle those values, no L will be written.

Demo string output:

>>> import json
>>> row = [1L,[0.1,0.2],[[1234L,1],[134L,2]]]
>>> json.dumps(row)
'[1, [0.1, 0.2], [[1234, 1], [134, 2]]]'

2 of 2

import json
row = [1L,[0.1,0.2],[[1234L,1],[134L,2]]]
row_json = json.dumps(row)

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More results from stackoverflow.com

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stackoverflow.com › questions › 68459450 › json-to-array-of-values-in-python

JSON to array of values in Python - Stack Overflow

Top answer

1 of 2

When you load the json you are actually converting it into a python dictionary. You can then simply show all values:

inputJSON = open('input.json')
inputData = json.load(inputJSON)
values = list(inputData.values())

2 of 2

If key:value is in plain text, you can do:

values = [pair.split(":")[1] for pair in inputData]

If by key:value you mean a dict type {key: value}, you can do as follows:

values = [list(pair.values())[0] for pair in inputData]

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