eval

pyval

Show the value of a python object via command line.

Examples:

.. code-block:: bash

$ pyval sys.platform
linux

This is meant to provide a more convenient alternative to:

.. code-block:: bash

python -c "import sys; print(sys.platform)"

More complex expressions are possible too:

.. code-block:: bash

$ pyval math.pi**2
9.869604401089358

$ pyval 'math.sin(math.pi/4)'
0.7071067811865475

The output can be influenced using one of the following command line arguments:

=========================== ================================================ -r, --repr Print repr(obj) -j, --json Print json.dumps(obj) -p, --pprint Print pprint(obj) -f SPEC, --format SPEC Print format(obj, SPEC) =========================== ================================================

Installation

The utility can be installed as follows::

pip install --user eval

It is also possible to simply download val.py and symlink or move under the name of your choice into your PATH, e.g.:

.. code-block:: bash

wget https://raw.githubusercontent.com/coldfix/pyval/master/val.py \
    -O ~/.local/bin/pyval

Once either of these is done, it can be used within any python enviroment on your system, as long as it is accessible in PATH.

By default it uses the currently activated environment. In order to use it with unactivated python interpreter, you currently have to call the interpreter manually as follows::

/path/to/python ~/.local/bin/pyval 'math.sin(math.sin/3)'

This module is kept deliberately simple and avoids any dependencies not in the standard library. This allows running the script in any python environment once it is installed on the system, without having to install it in each environment individually.

Changelog

0.0.5

Date: 06.07.2019

- fix SyntaxError due to unicode symbol on py2


0.0.4

Date: 13.06.2019

• learn --format SPEC argument
• learn --json argument

0.0.3

Date: 13.06.2019

- shorter stack traces in case of error


0.0.2

Date: 12.06.2019

• add --pprint argument to pretty-print

0.0.1

Date: 12.06.2019

Initial release

- simple script to print a python object from command line
- automatically resolves imports as necessary
- supports ``--repr`` option to show repr instead