compress-json 1.0.6

The missing Python utility to read and write large compressed JSONs.

The missing Python utility to read and write large compressed JSONs.

The library is loosely based on the compress_pickle library.

How do I install this package?

As usual, just download it using pip:

pip install compress_json

Tests Coverage

Since some software handling coverages sometimes get slightly different results, here’s three of them:

Available compression modes

The compression modes, detected automatically by the file name, are gzip, bz2 and lzma, with the notable exception of zip which seems difficult to integrate in the JSON pipeline.

Usage example

The library is extremely easy to use:

import compress_json

D = {
    "A":{
        "B":"C"
    }
}
compress_json.dump(D, "filepath.json.gz") # for a gzip file
compress_json.dump(D, "filepath.json.bz") # for a bz2 file
compress_json.dump(D, "filepath.json.lzma") # for a lzma file

D1 = compress_json.load("filepath.json.gz") # for loading a gzip file
D2 = compress_json.load("filepath.json.bz") # for loading a bz2 file
D3 = compress_json.load("filepath.json.lzma") # for loading a lzma file

Some extra perks: local loading and dumping

The library makes available, other than the usual load and dump from the JSON library, the methods local_load and local_dump, which let you load and dump file in the same directory of wherever you are calling them, by using the call stack.

This can get useful, especially when loading files within packages.

import compress_json

D = {
    "A": {
        "B": "C"
    }
}
compress_json.local_dump(D, "filepath.json.gz") # for a gzip file
compress_json.local_dump(D, "filepath.json.bz") # for a bz2 file
compress_json.local_dump(D, "filepath.json.lzma") # for a lzma file

D1 = compress_json.local_load("filepath.json.gz") # for loading a gzip file
D2 = compress_json.local_load("filepath.json.bz") # for loading a bz2 file
D3 = compress_json.local_load("filepath.json.lzma") # for loading a lzma file

Loading with RAM cache

Sometimes you need to load a compressed JSON file a LOT of times, and you may want to put this document in a cache or something of the sorts. Fortunately, we already provide this option for you:

import compress_json

D1 = compress_json.load(
    "filepath.json.gz",
    use_cache=True
)

D1 = compress_json.local_load(
    "filepath.json.gz",
    use_cache=True
)

Advanced usage

Clearly you can pass parameters to either the chosen compression mode or the json library as follows:

import compress_json

D = {
    "A": {
        "B": "C"
    }
}
compress_json.dump(
    D, "filepath.json.gz",
    compression_kwargs = {kwargs go here},
    json_kwargs = {kwargs go here}
)

D4 = compress_json.load(
    "filepath.json.gz",
    compression_kwargs = {kwargs go here},
    json_kwargs = {kwargs go here}
)