Multiple Python versions - Revision history

Bugman: removed Category:Software using HotCat

2020-10-21T18:50:56Z

2014-09-11T08:22:41Z

Added a link to Category:Python.

2013-08-13T13:39:32Z

2013-08-08T17:06:13Z

Modifying the sources

2013-08-08T17:03:52Z

Modifying the sources

2013-08-08T17:03:18Z

SCons

2013-08-08T16:58:56Z

SCons

2013-08-08T16:57:30Z

SCons

2013-08-08T16:56:53Z

Running relax

2013-08-08T16:54:49Z

Pointing to the correct version

← Older revision		Revision as of 13:39, 13 August 2013
Line 89:		Line 89:
	alias relax /usr/local/bin/python ~/bin/relax		alias relax /usr/local/bin/python ~/bin/relax
	</source>		</source>
		+
		+
		+	= See also =
		+
		+	[[Category:Software]]

@@ Line 71: / Line 71: @@
 </source>
-This will force the correct version.
+This will force the correct version.  Note that if you are using MS Windows you will need to modify the '''relax.bat''' file instead, adding the full Python path to the '''python''' command in that batch file.
 === Pointing to the correct version ===

@@ Line 17: / Line 17: @@
 === Modifying the sources ===
-The first is to edit the first line of this script to point to the correct Python version.  For example if the Python you wish to use is installed in the /usr/local/bin/ directory, you could change this script to:<source lang="bash">
+The first is to edit the first line of this script to point to the correct Python version.  For example if the Python you wish to use is installed in the /usr/local/bin/ directory, you could change this script to:
 <source lang="bash">
 #! /usr/local/bin/python

← Older revision		Revision as of 17:03, 8 August 2013
Line 12:		Line 12:
	</source>		</source>

−	This means that the script will look for Python in the PATH environmental variable (in Linux, Mac OS X, and MS Windows) and use that one rather than the Python version it was installed for. This is a fatal problem when multiple Python versions are present as the SCons files are installed as a site-package ~~only~~ for the specific Python version. There are two methods to overcome this difficulty, either by modifying the SCons source file or by pointing to the correct Python and SCons versions.	+	This means that the script will look for Python in the PATH environmental variable (in Linux, Mac OS X, and MS Windows) and use that one rather than the Python version it was installed for. This is a fatal problem when multiple Python versions are present as the SCons files are installed as a site-package for the specific Python version, not for the default Python version on the PATH. There are two methods to overcome this difficulty, either by modifying the SCons source file or by pointing to the correct Python and SCons versions.

← Older revision		Revision as of 16:58, 8 August 2013
Line 12:		Line 12:
	</source>		</source>

−	This means that the script will look for Python in the PATH environmental variable (in Linux, Mac OS X, and MS Windows) and use that one rather than the Python it was installed for. There are two methods to overcome this difficulty, either by modifying the SCons source file or by pointing to the correct Python and SCons versions.	+	This means that the script will look for Python in the PATH environmental variable (in Linux, Mac OS X, and MS Windows) and use that one rather than the Python version it was installed for. This is a fatal problem when multiple Python versions are present as the SCons files are installed as a site-package only for the specific Python version. There are two methods to overcome this difficulty, either by modifying the SCons source file or by pointing to the correct Python and SCons versions.

@@ Line 12: / Line 12: @@
 </source>
-This means that the script will look for Python in the PATH environmental variable (in Linux, Mac OS X, and MS Windows) and use that one rather than the Python it was installed for.  There are two methods to overcome this difficulty.
+This means that the script will look for Python in the PATH environmental variable (in Linux, Mac OS X, and MS Windows) and use that one rather than the Python it was installed for.  There are two methods to overcome this difficulty, either by modifying the SCons source file or by pointing to the correct Python and SCons versions.
 === Modifying the sources ===
@@ Line 41: / Line 42: @@
 The last command forces '''/usr/local/bin/scons''' to use the correct Python version.
 == Running relax ==

@@ Line 45: / Line 45: @@
 == Running relax ==
-When multiple Python versions are present, there are two ways to run relax with the correct version.
+When multiple Python versions are present there are two ways to run relax with the correct version, either by modifying the relax sources or by pointing to the correct Python version.
 === Modifying the sources ===

@@ Line 87: / Line 87: @@
 For csh or tcsh, modify the '''~/.cshrc''' file as:
-<source lang="csh">
+<source lang="bash">
 alias relax /usr/local/bin/python ~/bin/relax
 </source>