Question 284748 in Json Question posted in
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How can I serialize a Python list as a single line in JSON?

It appears to be that by default Python json module serializes a Python list using new lines between each element, like so:

"data": [
    -6.150000000000006,
    -0.5,
    0.539999999999992,
    0.5800000000000125,
    -4.6299999999999955,
    12.0,
    2.829999999999984,
    -1.4199999999999875,
    1.759999999999991,
    -1.25,

I would like to serialize the contents of this list on a single line, if possible. How can I do that?

I am using json.dumps(data, indent=4) to perform the serialization step.

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2

Answers


  1. Chosen as BEST ANSWER
    0

    One possible solution:

    Serialize the list to a string first, then serialize the remaining contents of the dictionary.

    There is a disadvantage to this:

    • The code is more complex, serialization and deserialization must be done in two steps
    • The list is now stored as a string literal rather than a list

    ... in other words it looks like this ...

    my_list: "[]"

    ... instead of this ...

    my_list: []

  2. 0

    using python version 3.8 , run this code below.
    python

    import json

data = {
    "data": [-6.150000000000006,
    -0.5,
    0.539999999999992,
    0.5800000000000125,
    -4.6299999999999955,
    12.0,
    2.829999999999984,
    -1.4199999999999875,
    1.759999999999991,
    -1.25,]
}

# Serializing without indentation
json_string = json.dumps(data)

print(json_string)
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