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jq.py: a lightweight and flexible JSON processor
================================================
This project contains Python bindings for
`jq <http://stedolan.github.io/jq/>`_.
Installation
------------
During installation,
the source for jq 1.5 is downloaded over HTTPS and built.
Therefore, installation requires any programs required to build jq.
This includes:
* Autoreconf
* The normal C compiler toolchain, such as gcc and make.
* libtool
* Python headers.
Debian, Ubuntu or relatives
~~~~~~~~~~~~~~~~~~~~~~~~~~~
If on Debian, Ubuntu or relatives, running the following command should be sufficient:
.. code-block:: sh
apt-get install autoconf automake build-essential libtool python-dev
Red Hat, Fedora, CentOS or relatives
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
If on Red Hat, Fedora, CentOS, or relatives, running the following command should be sufficient:
.. code-block:: sh
yum groupinstall "Development Tools"
yum install autoconf automake libtool python
Mac OS X
~~~~~~~~
If on Mac OS X, you probably want to install
`Xcode <https://developer.apple.com/xcode/>`_ and `Homebrew <http://brew.sh/>`_.
Once Homebrew is installed, you can install the remaining dependencies with:
.. code-block:: sh
brew install autoconf automake libtool
Usage
-----
A program can be compiled by passing it to ``jq.jq``.
To apply the program to an input, call the ``transform`` method.
jq.py expects the value to be valid JSON,
such as values returned from ``json.load``.
.. code-block:: python
from jq import jq
jq(".").transform("42") == "42"
jq(".").transform({"a": 1}) == {"a": 1}
If the value is unparsed JSON text, pass it in using the ``text``
argument:
.. code-block:: python
jq(".").transform(text="42") == 42
The ``text_output`` argument can be used to serialise the output into
JSON text:
.. code-block:: python
jq(".").transform("42", text_output=True) == '"42"'
If there are multiple output elements, each element is represented by a
separate line, irrespective of the value of ``multiple_output``:
.. code-block:: python
jq(".[]").transform([1, 2, 3], text_output=True) == "1\n2\n3"
If ``multiple_output`` is ``False`` (the default), then the first output
is used:
.. code-block:: python
jq(".[]+1").transform([1, 2, 3]) == 2
If ``multiple_output`` is ``True``, all output elements are returned in
an array:
.. code-block:: python
jq(".[]+1").transform([1, 2, 3], multiple_output=True) == [2, 3, 4]
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