It's a small tool, but jq is great.
If you're on a mac you can install the tool via;
brew install jq
On many linux distributions you should be able to install it via;
apt-get install jq
You can confirm the installation command for your linux distribution.
You can get the version information from pip shown as json via;
pip list --format json
This json data can be passed to jq.
pip list --format json | jq
jq app can wrangle it from here using it's domain specific lanuage. For example;
the code below will remove the outer
pip list --format json | jq "."
We can also add the
-c flag to make the data appear as jsonlines.
pip list --format json | jq -c "."
Because the data is now pasted line by line, we can continue to use
pip list --format json | jq -c "." | grep num
From here you can move on to save the data into a file.
pip list --format json | jq -c "." | grep num > subset.jsonl
jq is used to read in a json file that is on disk. This can be done via;
cat filename.json | jq
There are a lot of things that you can do with
jq. Feel free to explore the
docs. One final reminder is that while
indeed very powerful, there comes a moment when you'll want to use a programming
language instead of a tool from the terminal to parse the data. If you're interested
you might enjoy clumper for this use-case.
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