python package common tasks for users (e.g. copy examples, fetch data, ...)
A utility package that includes:
pyct.cmd: Makes various commands available to other packages. (Currently no sophisticated plugin system, just a try import/except in the other packages.) The same commands are available from within python. Can either add new subcommands to an existing argparse based command if the module has an existing command, or create the entire command if the module has no existing command. Currently, there are commands for copying examples and fetching data. See
pyct.build: Provides various commands to help package building, primarily as a convenience for project maintainers.
To install pyct with the dependencies required for pyct.cmd:
pip install pyct[cmd] or
conda install -c pyviz pyct.
An example of how to use in a project: https://github.com/ioam/geoviews/blob/master/geoviews/__main__.py
Once added, users can copy the examples of a package and download the
required data with the
$ datashader examples --help usage: datashader examples [-h] [--path PATH] [-v] [--force] optional arguments: -h, --help show this help message and exit --path PATH location to place examples and data -v, --verbose --force if PATH already exists, force overwrite existing examples if older than source examples
To copy the examples of e.g. datashader but not download the data,
usage: datashader copy-examples [-h] [--path PATH] [-v] [--force] optional arguments: -h, --help show this help message and exit --path PATH where to copy examples -v, --verbose --force if PATH already exists, force overwrite existing examples if older than source examples
And to download the data only, the
usage: datashader fetch-data [-h] [--path PATH] [--datasets DATASETS] [-v] optional arguments: -h, --help show this help message and exit --path PATH where to put data --datasets DATASETS *name* of datasets file; must exist either in path specified by --path or in package/examples/ -v, --verbose
Can specify different 'datasets' file:
$ cat earthsim-examples/test.yml --- data: - url: http://s3.amazonaws.com/datashader-data/Chesapeake_and_Delaware_Bays.zip title: 'Depth data for the Chesapeake and Delaware Bay region of the USA' files: - Chesapeake_and_Delaware_Bays.3dm $ earthsim fetch-data --path earthsim-examples --datasets-filename test.yml Downloading data defined in /tmp/earthsim-examples/test.yml to /tmp/earthsim-examples/data Skipping Depth data for the Chesapeake and Delaware Bay region of the USA
Currently provides a way to package examples with a project, by copying an examples folder into the package directory whenever setup.py is run. The way this works is likely to change in the near future, but is provided here as the first step towards unifying/simplifying the maintenance of a number of pyviz projects.
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