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Name: cligj
Version: 0.4.0
Summary: Click params for commmand line interfaces to GeoJSON
Home-page: https://github.com/mapbox/cligj
Author: Sean Gillies
Author-email: sean@mapbox.com
License: BSD
Description: cligj
======
.. image:: https://travis-ci.org/mapbox/cligj.svg
:target: https://travis-ci.org/mapbox/cligj
.. image:: https://coveralls.io/repos/mapbox/cligj/badge.png?branch=master
:target: https://coveralls.io/r/mapbox/cligj?branch=master
Common arguments and options for GeoJSON processing commands, using Click.
`cligj` is for Python developers who create command line interfaces for geospatial data.
`cligj` allows you to quickly build consistent, well-tested and interoperable CLIs for handling GeoJSON.
Arguments
---------
``files_in_arg``
Multiple files
``files_inout_arg``
Multiple files, last of which is an output file.
``features_in_arg``
GeoJSON Features input which accepts multiple representations of GeoJSON features
and returns the input data as an iterable of GeoJSON Feature-like dictionaries
Options
--------
``verbose_opt``
``quiet_opt``
``format_opt``
JSON formatting options
~~~~~~~~~~~~~~~~~~~~~~~
``indent_opt``
``compact_opt``
Coordinate precision option
~~~~~~~~~~~~~~~~~~~~~~~~~~~
``precision_opt``
Geographic (default), projected, or Mercator switch
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
``projection_geographic_opt``
``projection_projected_opt``
``projection_mercator_opt``
Feature collection or feature sequence switch
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
``sequence_opt``
``use_rs_opt``
GeoJSON output mode option
~~~~~~~~~~~~~~~~~~~~~~~~~~
``geojson_type_collection_opt``
``geojson_type_feature_opt``
``def geojson_type_bbox_opt``
Example
-------
Here's an example of a command that writes out GeoJSON features as a collection
or, optionally, a sequence of individual features. Since most software that
reads and writes GeoJSON expects a text containing a single feature collection,
that's the default, and a LF-delimited sequence of texts containing one GeoJSON
feature each is a feature that is turned on using the ``--sequence`` option.
To write sequences of feature texts that conform to the `JSON Text Sequences
proposed standard
<http://tools.ietf.org/html/draft-ietf-json-text-sequence-13>`__ (and might
contain pretty-printed JSON) with the ASCII Record Separator (0x1e) as
a delimiter, use the ``--rs`` option
.. code-block:: python
import click
import cligj
import json
def process_features(features):
for feature in features:
# TODO process feature here
yield feature
@click.command()
@cligj.features_in_arg
@cligj.sequence_opt
@cligj.use_rs_opt
def pass_features(features, sequence, use_rs):
if sequence:
for feature in process_features(features):
if use_rs:
click.echo(b'\x1e', nl=False)
click.echo(json.dumps(feature))
else:
click.echo(json.dumps(
{'type': 'FeatureCollection',
'features': list(process_features(features))}))
On the command line, the generated help text explains the usage
.. code-block:: console
Usage: pass_features [OPTIONS] FEATURES...
Options:
--sequence / --no-sequence Write a LF-delimited sequence of texts
containing individual objects or write a single
JSON text containing a feature collection object
(the default).
--rs / --no-rs Use RS (0x1E) as a prefix for individual texts
in a sequence as per http://tools.ietf.org/html
/draft-ietf-json-text-sequence-13 (default is
False).
--help Show this message and exit.
And can be used like this
.. code-block:: console
$ cat data.geojson
{'type': 'FeatureCollection', 'features': [{'type': 'Feature', 'id': '1'}, {'type': 'Feature', 'id': '2'}]}
$ pass_features data.geojson
{'type': 'FeatureCollection', 'features': [{'type': 'Feature', 'id': '1'}, {'type': 'Feature', 'id': '2'}]}
$ cat data.geojson | pass_features
{'type': 'FeatureCollection', 'features': [{'type': 'Feature', 'id': '1'}, {'type': 'Feature', 'id': '2'}]}
$ cat data.geojson | pass_features --sequence
{'type': 'Feature', 'id': '1'}
{'type': 'Feature', 'id': '2'}
$ cat data.geojson | pass_features --sequence --rs
^^{'type': 'Feature', 'id': '1'}
^^{'type': 'Feature', 'id': '2'}
In this example, ``^^`` represents 0x1e.
Plugins
-------
.. warning::
The cligj.plugins module is deprecated and will be removed at version 1.0.
Use `click-plugins <https://github.com/click-contrib/click-plugins>`_
instead.
Platform: UNKNOWN
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