Python Swig Examples - Revision history

⚠️Wenzeslaus: RemoveOrConserve

2015-03-04T15:40:26Z

RemoveOrConserve

← Older revision		Revision as of 15:40, 4 March 2015
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			{{RemoveOrConserve}}

	Important: SWIG has been removed from GRASS 6.4+ in favour of "ctypes" which		Important: SWIG has been removed from GRASS 6.4+ in favour of "ctypes" which
	provide a more stable and portable environment. This page needs to be		provide a more stable and portable environment. This page needs to be

⚠️Landa: /* See also */

2011-01-17T14:34:34Z

⚠️Landa: moved PythonSwigExamples to Python Swig Examples

2011-01-13T13:59:27Z

moved PythonSwigExamples to Python Swig Examples

← Older revision		Revision as of 13:59, 13 January 2011
(No difference)

Neteler: Hint added: GRASS-SWIG is deprecated. Page needs update to ctypes.

2010-10-17T17:11:42Z

Hint added: GRASS-SWIG is deprecated. Page needs update to ctypes.

← Older revision		Revision as of 17:11, 17 October 2010
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			Important: SWIG has been removed from GRASS 6.4+ in favour of "ctypes" which
			provide a more stable and portable environment. This page needs to be
			updated accordingly.

	= Advanced SWIG Python Interface Examples =		= Advanced SWIG Python Interface Examples =

Neteler: color source code; +cats

2010-01-27T23:42:50Z

color source code; +cats

← Older revision		Revision as of 23:42, 27 January 2010
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	python setup.py build		python setup.py build
	#python setup.py install --prefix=/home/user		#python setup.py install --prefix=/home/user
	cp build/lib.linux-i686-2.4/NumPtr. /usr/src/~~grass63~~/swig/python/		cp build/lib.linux-i686-2.4/NumPtr. /usr/src/grass64/swig/python/


	== Examples ==		== Examples ==
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	==== m.distance.demo ====		==== m.distance.demo ====

	* For the full version of ''m.distance'' have a look at [http://trac.osgeo.org/grass/browser/grass/trunk/swig/python/examples swig/python/examples/m.distance] in the GRASS source code. It allows multi-segment input from coordinate pairs piped from stdin and DDD:MM:SS.SSS formatted coordinates for Lat/Lon.		Note: For the full version of ''m.distance'' have a look at [http://trac.osgeo.org/grass/browser/grass/trunk/swig/python/examples swig/python/examples/m.distance] in the GRASS source code. It allows multi-segment input from coordinate pairs piped from stdin and DDD:MM:SS.SSS formatted coordinates for Lat/Lon.


			<source lang="python">
	#!/usr/bin/python		#!/usr/bin/python
	############################################################################		############################################################################
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	else:		else:
	main();		main();
			</source>

			== See also ==

			* [[GRASS and Python]]

			[[Category:Development]]
			[[Category:Linking to other languages]]
			[[Category:Python]]

⚠️HamishBowman: /* Passing arrays and specific data types */ link

2010-01-26T13:23:17Z

Passing arrays and specific data types: link

← Older revision		Revision as of 13:23, 26 January 2010
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	: (''any way to then free() the memory?'' Does "<tt>del SomePtr</tt>" do it?)		: (''any way to then free() the memory?'' Does "<tt>del SomePtr</tt>" do it?)

	NumPtr in turn depends on the more common [http://numpy.scipy.org/ Numeric python] (NumPy) module.		NumPtr in turn depends on the more common [http://numpy.scipy.org/ Numeric python] (NumPy) module. See the example on the [[GRASS and Python]] wiki page.

⚠️HamishBowman: /* Interfacing with NumPy */ move to python page

2010-01-26T13:21:54Z

Interfacing with NumPy: move to python page

@@ Line 33: / Line 33: @@
   #python setup.py install --prefix=/home/user
   cp build/lib.linux-i686-2.4/*NumPtr.* /usr/src/grass63/swig/python/
 == Examples ==

⚠️HamishBowman: NumPy

2010-01-26T13:19:39Z

NumPy

@@ Line 18: / Line 18: @@
 === Setting up the NumPtr module ===
 NumPtr setup:
@@ Line 31: / Line 33: @@
   #python setup.py install --prefix=/home/user
   cp build/lib.linux-i686-2.4/*NumPtr.* /usr/src/grass63/swig/python/
 == Examples ==

⚠️HamishBowman: /* Passing arrays and specific data types */ numpy

2008-03-03T23:05:17Z

Passing arrays and specific data types: numpy

← Older revision		Revision as of 23:05, 3 March 2008
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	Some of GRASS's functions want to be passed arrays of numbers or of a specific data type (e.g. integer, double). To do this from Python the 3rd party [http://geosci.uchicago.edu/csc/numptr/ NumPtr] module is used to access a memory pointer object which can be passed to the function.		Some of GRASS's functions want to be passed arrays of numbers or of a specific data type (e.g. integer, double). To do this from Python the 3rd party [http://geosci.uchicago.edu/csc/numptr/ NumPtr] module is used to access a memory pointer object which can be passed to the function.
	: (''any way to then free() the memory?'' Does "<tt>del SomePtr</tt>" do it?)		: (''any way to then free() the memory?'' Does "<tt>del SomePtr</tt>" do it?)

			NumPtr in turn depends on the more common [http://numpy.scipy.org/ Numeric python] (NumPy) module.


	=== Setting up the NumPtr module ===		=== Setting up the NumPtr module ===

⚠️HamishBowman: /* m.distance */ link to full m.distance module

2008-03-03T23:00:48Z

m.distance: link to full m.distance module

← Older revision		Revision as of 23:00, 3 March 2008
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	==== m.distance ====		==== m.distance.demo ====

			* For the full version of ''m.distance'' have a look at [http://trac.osgeo.org/grass/browser/grass/trunk/swig/python/examples swig/python/examples/m.distance] in the GRASS source code. It allows multi-segment input from coordinate pairs piped from stdin and DDD:MM:SS.SSS formatted coordinates for Lat/Lon.

	* TODO: a loop to handle "<tt>#% multiple: yes</tt>" coords and allowing input coords to be piped from stdin.

	#!/usr/bin/python		#!/usr/bin/python
	############################################################################		############################################################################
	#		#
	# MODULE: m.distance		# MODULE: m.distance.demo
	#		#
	# AUTHOR(S): Hamish Bowman, Dunedin, New Zealand		# AUTHOR(S): Hamish Bowman, Dunedin, New Zealand
	#		#
	# PURPOSE: Find distance between two points		# PURPOSE: Find distance between two points
	# Demonstrates GRASS SWIG-Python ~~interace~~		# Uses geodetic distance calculations for Lat/Lon locations
			# Demonstrates GRASS SWIG-Python interface
	#		#
	# COPYRIGHT: (c) 2008 ~~Hamish Bowman, and~~ The GRASS Development Team		# COPYRIGHT: (c) 2008 The GRASS Development Team
	#		#
	# This program is free software under the GNU General Public		# This program is free software under the GNU General Public
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	#%Module		#%Module
	#% description: Find distance between two points		#% description: Find distance between two points.
	#% keywords: miscellaneous, distance, measure		#% keywords: miscellaneous, distance, measure
	#%End		#%End

← Older revision		Revision as of 14:34, 17 January 2011
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	* [[GRASS and Python]]		* [[GRASS and Python]]

	~~[[Category:Development]]~~		{{Python}}
	~~[[Category:Linking to other languages]]~~
	~~[[Category:~~Python]]