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How to filter a json file to show only the information I need?

To start off I want to say I'm fairly new to python and working with JSON so sorry if this question was asked before and I overlooked it.

I have a JSON file that looks like this:

[
    {
        "Store": 417,
        "Item": 10,
        "Name": "Burger",
        "Modifiable": true,
        "Price": 8.90,
        "LastModified": "09/02/2019 21:30:00"
    },
    {
        "Store": 417,
        "Item": 15,
        "Name": "Fries",
        "Modifiable": false,
        "Price": 2.60,
        "LastModified": "10/02/2019 23:00:00"
    }
]

I need to filter this file to only show Item and Price, like

[
    {
        "Item": 10,
        "Price": 8.90
    },
    {
        "Item": 15,
        "Price": 2.60
    }
]

I have a code that looks like this:

# Transform json input to python objects
with open("StorePriceList.json") as input_file:
    input_dict = json.load(input_file)

# Filter python objects with list comprehensions
output_dict = [x for x in input_dict if ] #missing logical test here.

# Transform python object back into json
output_json = json.dumps(output_dict)

# Show json
print(output_json)

What logical test I should be doing here to do that?

Let's say we can use dict comprehension, then it will be

output_dict = [{k:v for k,v in x.items() if k in ["Item", "Price"]} for x in input_dict]

Filtering JSON data in python, (File extensions don't matter to Python). Parse the names from the objects in each JSON array row import json with open("file.txt") as f: for line in f: names� Python supports JSON through a built-in package called json. To use this feature, we import the json package in Python script. The text in JSON is done through quoted string which contains value in key-value mapping within { }. It is similar to the dictionary in Python.

You can also do it like this :)

>>> [{key: d[key] for key in ['Item', 'Price']} for d in input_dict] # you should rename it to `input_list` rather than `input_dict` :)
[{'Item': 10, 'Price': 8.9}, {'Item': 15, 'Price': 2.6}]

Working With JSON Data in Python – Real Python, Using Python's context manager, you can create a file called data_file.json and open it in All you need to do is filter todos and write the resulting list to a file. But once these data structures reach a certain level of complexity you really should consider a Python module that implements JSONPath (analogous to xPath for XML). The ability to query JSON using JSONPath can be done with Python modules such as jsonpath_rw and jsonpath_rw_ext which gives us the ability to easily specify objects deep in the graph.

import pprint
with open('data.json', 'r') as f:
        qe = json.load(f)
        list = []
        for item in qe['<your data>']: 
            query = (f'{item["Item"]} {item["Price"]}')

        print("query")

Working With JSON Data in Python, The text in JSON is done through quoted string which contains value in key-value mapping within { } . To handle the data flow in a file, the JSON library in Python uses dump() function to convert the Python Value = list ( filter (keep, todos)). Reading JSON from a File. On the other end, reading JSON data from a file is just as easy as writing it to a file. Using the same json package again, we can extract and parse the JSON string directly from a file object. In the following example, we do just that and then print out the data we got:

Filter JSON file by value for single field, I'm working with this pretty gigantic JSON file of business registration IDs and hello paragon, I have implemented the solution in both php and python, Select� json.load(): json.load() accepts file object, parses the JSON data, populates a Python dictionary with the data and returns it back to you. Syntax: json.loads(file object) Example: Suppose the JSON file looks like this:

How to use JSON with Python, SaveFileName("Save JSON file as", filter) # If the file name exists, write a JSON string into the file. if filename: # Writing JSON� For your final task, you’ll create a JSON file that contains the completed TODOs for each of the users who completed the maximum number of TODOs. All you need to do is filter todos and write the resulting list to a file. For the sake of originality, you can call the output file filtered_data_file.json. There are may ways you could go about

How to search for data in JSON using python – Linux Hint, How JSON data can be searched based on key or value using the python script is Example-5: Search entry from a JSON file using filter method and lambda. Here, we have used the open () function to read the json file. Then, the file is parsed using json.load () method which gives us a dictionary named data. If you do not know how to read and write files in Python, we recommend you to check Python File I/O.

Comments
  • Thanks, exactly what I needed.