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Top Forums UNIX for Beginners Questions & Answers How to set python2 as my default? Post 303035087 by Circuits on Tuesday 14th of May 2019 01:09:54 PM
Old 05-14-2019
Yes I am well aware of the differences between py2 and py3 lol I have had to convert a handful of python scripts from 2 to 3 in the past. As far as I know neither the Linux OS or the DOS OS has any dependencies on Python. No I just need to temporarily move from py3 to py2 so that I can compile an older program and I would like to do it with update-alternatives so that I can easily change back after I compile the program.
 

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PYCENTRAL()															       PYCENTRAL()

NAME
pycentral - register and build utility for Python packages SYNOPSIS
pycentral [-h] [-v] <cmd> [<cmd options>] [<args>] DESCRIPTION
pycentral provides support for installing python modules independent of the current installed Python version and handling byte-compilation and -removal tasks in installation scripts. OPTIONS
-v, --version Limit the output to the version numbers of the python versions. -h, --help Print a help text. pycentral has the following sub commands. For fine grained help, call: pycentral <cmd>. bccompile Byte compile .py files in a package. bcremove Remove the byte compiled .py files. list List all managed files. pkginstall Make a package available for all supported runtimes. pkgprepare Prepare a package for all supported runtimes. pkgremove Remove a package installed for all supported runtimes. pkglist List pycentral-managed files of a package for all supported runtimes. rtinstall Make installed packages available for this runtime. rtremove Remove packages installed for this runtime. updatedefault Update the default python version. debhelper move files to pycentral locaation, variable substitutions (called by dh_pycentral). pycentraldir <package> Show the installation directory used by pycentral for <package>. showdefault Show default python version number. Deprecated, use pyversions(1) showsupported Show the supported python versions. Deprecated, use pyversions(1) showversions Show version numbers of supported python versions. Deprecated, use pyversions(1) dh_pycentral, should not be called directly). version Show the pycentral version. FILES
/etc/python/debian_config is searched for the attribute overwrite-local. If set to 1, or True, existing files in /usr/lib/pythonX.Y/*-packages are overwritten with symbolic links to the pycentral install area. The default is to abort the installation of a package, when files already exist. This behaviour may be useful, when python libraries were manually installed into this directory. The attribute byte-compile can be set to a comma separated list of the values standard and optimze to indicate how files should be byte- compiled. SEE ALSO
pyversions(1), Python policy. AUTHOR
Matthias Klose PYCENTRAL()
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