Python-Teaching: Difference between revisions

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=== Version ===
=== Version ===
2.7.16, 3.7.4
2.7.18, 3.9.6, 3.10.4, 3.10.8, 3.11.3, 3.11.5, 3.12.3, 3.13.1, 3.13.5
 
=== Author / Distributor ===
=== Author / Distributor ===
   
   
Line 21: Line 21:
=== Running Program ===
=== Running Program ===


'''Version 2.7.16'''
Please also see [[Python-Sapelo2]] as that documentation applies to the teaching cluster as well.


Installed in /apps/eb/Python/2.7.16-GCCcore-8.3.0
To see all versions of Python installed on the cluster, use:
<pre class="gscript">
ml spider Python
</pre>
 
For example:
 
'''Version 2.7.18'''
 
Installed in /apps/eb/Python/2.7.18-GCCcore-11.3.0


To use this version, please load the module with
To use this version, please load the module with
<pre class="gscript">
<pre class="gscript">
ml Python/2.7.16-GCCcore-8.3.0
ml Python/2.7.18-GCCcore-11.3.0
</pre>  
</pre>  


'''Version 3.7.4'''
'''Version 3.12.3'''


Installed in /apps/eb/Python/3.7.4-GCCcore-8.3.0
Installed in /apps/eb/Python/3.12.3-GCCcore-13.3.0


To use this version, please load the module with
To use this version, please load the module with
<pre class="gscript">
<pre class="gscript">
ml Python/3.7.4-GCCcore-8.3.0
ml Python/3.12.3-GCCcore-13.3.0
</pre>  
</pre>  


Line 55: Line 64:
   
   
cd $SLURM_SUBMIT_DIR<br>
cd $SLURM_SUBMIT_DIR<br>
ml Python/2.7.16-GCCcore-8.3.0<br>     
ml Python/3.12.3-GCCcore-13.3.0<br>     
python <u>[options]</u><br>   
python <u>[options]</u><br>   
</div>
</div>
Line 71: Line 80:
   
   
<pre  class="gcommand">
<pre  class="gcommand">
ml Python/2.7.16-GCCcore-8.3.0
ml Python/3.12.3-GCCcore-13.3.0
python -h
python -h


usage: python [option] ... [-c cmd | -m mod | file | -] [arg] ...
usage: python [option] ... [-c cmd | -m mod | file | -] [arg] ...
Options and arguments (and corresponding environment variables):
Options (and corresponding environment variables):
-b    : issue warnings about comparing bytearray with unicode
-b    : issue warnings about converting bytes/bytearray to str and comparing
        (-bb: issue errors)
        bytes/bytearray with str or bytes with int. (-bb: issue errors)
-B    : don't write .py[co] files on import; also PYTHONDONTWRITEBYTECODE=x
-B    : don't write .pyc files on import; also PYTHONDONTWRITEBYTECODE=x
-c cmd : program passed in as string (terminates option list)
-c cmd : program passed in as string (terminates option list)
-d    : debug output from parser; also PYTHONDEBUG=x
-d    : turn on parser debugging output (for experts only, only works on
        debug builds); also PYTHONDEBUG=x
-E    : ignore PYTHON* environment variables (such as PYTHONPATH)
-E    : ignore PYTHON* environment variables (such as PYTHONPATH)
-h    : print this help message and exit (also --help)
-h    : print this help message and exit (also -? or --help)
-i    : inspect interactively after running script; forces a prompt even
-i    : inspect interactively after running script; forces a prompt even
         if stdin does not appear to be a terminal; also PYTHONINSPECT=x
         if stdin does not appear to be a terminal; also PYTHONINSPECT=x
-I    : isolate Python from the user's environment (implies -E and -s)
-m mod : run library module as a script (terminates option list)
-m mod : run library module as a script (terminates option list)
-O    : optimize generated bytecode slightly; also PYTHONOPTIMIZE=x
-O    : remove assert and __debug__-dependent statements; add .opt-1 before
-OO    : remove doc-strings in addition to the -O optimizations
        .pyc extension; also PYTHONOPTIMIZE=x
-R     : use a pseudo-random salt to make hash() values of various types be
-OO    : do -O changes and also discard docstrings; add .opt-2 before
         unpredictable between separate invocations of the interpreter, as
        .pyc extension
        a defense against denial-of-service attacks
-P     : don't prepend a potentially unsafe path to sys.path; also
-Q arg : division options: -Qold (default), -Qwarn, -Qwarnall, -Qnew
         PYTHONSAFEPATH
-s    : don't add user site directory to sys.path; also PYTHONNOUSERSITE
-q    : don't print version and copyright messages on interactive startup
-s    : don't add user site directory to sys.path; also PYTHONNOUSERSITE=x
-S    : don't imply 'import site' on initialization
-S    : don't imply 'import site' on initialization
-t    : issue warnings about inconsistent tab usage (-tt: issue errors)
-u    : force the stdout and stderr streams to be unbuffered;
-u    : unbuffered binary stdout and stderr; also PYTHONUNBUFFERED=x
        this option has no effect on stdin; also PYTHONUNBUFFERED=x
        see man page for details on internal buffering relating to '-u'
-v    : verbose (trace import statements); also PYTHONVERBOSE=x
-v    : verbose (trace import statements); also PYTHONVERBOSE=x
         can be supplied multiple times to increase verbosity
         can be supplied multiple times to increase verbosity
-V    : print the Python version number and exit (also --version)
-V    : print the Python version number and exit (also --version)
        when given twice, print more information about the build
-W arg : warning control; arg is action:message:category:module:lineno
-W arg : warning control; arg is action:message:category:module:lineno
         also PYTHONWARNINGS=arg
         also PYTHONWARNINGS=arg
-x    : skip first line of source, allowing use of non-Unix forms of #!cmd
-x    : skip first line of source, allowing use of non-Unix forms of #!cmd
-3    : warn about Python 3.x incompatibilities that 2to3 cannot trivially fix
-X opt : set implementation-specific option
--check-hash-based-pycs always|default|never:
        control how Python invalidates hash-based .pyc files
--help-env: print help about Python environment variables and exit
--help-xoptions: print help about implementation-specific -X options and exit
--help-all: print complete help information and exit
 
Arguments:
file  : program read from script file
file  : program read from script file
-      : program read from stdin (default; interactive mode if a tty)
-      : program read from stdin (default; interactive mode if a tty)
arg ...: arguments passed to program in sys.argv[1:]
arg ...: arguments passed to program in sys.argv[1:]
Other environment variables:
PYTHONSTARTUP: file executed on interactive startup (no default)
PYTHONPATH  : ':'-separated list of directories prefixed to the
              default module search path.  The result is sys.path.
PYTHONHOME  : alternate <prefix> directory (or <prefix>:<exec_prefix>).
              The default module search path uses <prefix>/pythonX.X.
PYTHONCASEOK : ignore case in 'import' statements (Windows).
PYTHONIOENCODING: Encoding[:errors] used for stdin/stdout/stderr.
PYTHONHASHSEED: if this variable is set to 'random', the effect is the same
  as specifying the -R option: a random value is used to seed the hashes of
  str, bytes and datetime objects.  It can also be set to an integer
  in the range [0,4294967295] to get hash values with a predictable seed.


</pre>
</pre>

Latest revision as of 15:16, 9 January 2026

Category

Programming

Program On

Teaching

Version

2.7.18, 3.9.6, 3.10.4, 3.10.8, 3.11.3, 3.11.5, 3.12.3, 3.13.1, 3.13.5

Author / Distributor

Python

Description

"Python is a programming language that lets you work more quickly and integrate your systems more effectively." More details are at Python

Running Program

Please also see Python-Sapelo2 as that documentation applies to the teaching cluster as well.

To see all versions of Python installed on the cluster, use:

ml spider Python

For example:

Version 2.7.18

Installed in /apps/eb/Python/2.7.18-GCCcore-11.3.0

To use this version, please load the module with

ml Python/2.7.18-GCCcore-11.3.0

Version 3.12.3

Installed in /apps/eb/Python/3.12.3-GCCcore-13.3.0

To use this version, please load the module with

ml Python/3.12.3-GCCcore-13.3.0


Here is an example of a shell script, sub.sh, to run on the batch queue:

#!/bin/bash
#SBATCH --job-name=j_Python
#SBATCH --partition=batch
#SBATCH --mail-type=ALL
#SBATCH --mail-user=username@uga.edu
#SBATCH --ntasks=1
#SBATCH --mem=10gb
#SBATCH --time=08:00:00
#SBATCH --output=Python.%j.out
#SBATCH --error=Python.%j.err

cd $SLURM_SUBMIT_DIR
ml Python/3.12.3-GCCcore-13.3.0
python [options]

In the real submission script, at least all the above underlined values need to be reviewed or to be replaced by the proper values.

Please refer to Running_Jobs_on_the_teaching_cluster, Run X window Jobs and Run interactive Jobs for more details of running jobs at Teaching cluster.


Here is an example of job submission command:

sbatch ./sub.sh 

Documentation

ml Python/3.12.3-GCCcore-13.3.0
python -h

usage: python [option] ... [-c cmd | -m mod | file | -] [arg] ...
Options (and corresponding environment variables):
-b     : issue warnings about converting bytes/bytearray to str and comparing
         bytes/bytearray with str or bytes with int. (-bb: issue errors)
-B     : don't write .pyc files on import; also PYTHONDONTWRITEBYTECODE=x
-c cmd : program passed in as string (terminates option list)
-d     : turn on parser debugging output (for experts only, only works on
         debug builds); also PYTHONDEBUG=x
-E     : ignore PYTHON* environment variables (such as PYTHONPATH)
-h     : print this help message and exit (also -? or --help)
-i     : inspect interactively after running script; forces a prompt even
         if stdin does not appear to be a terminal; also PYTHONINSPECT=x
-I     : isolate Python from the user's environment (implies -E and -s)
-m mod : run library module as a script (terminates option list)
-O     : remove assert and __debug__-dependent statements; add .opt-1 before
         .pyc extension; also PYTHONOPTIMIZE=x
-OO    : do -O changes and also discard docstrings; add .opt-2 before
         .pyc extension
-P     : don't prepend a potentially unsafe path to sys.path; also
         PYTHONSAFEPATH
-q     : don't print version and copyright messages on interactive startup
-s     : don't add user site directory to sys.path; also PYTHONNOUSERSITE=x
-S     : don't imply 'import site' on initialization
-u     : force the stdout and stderr streams to be unbuffered;
         this option has no effect on stdin; also PYTHONUNBUFFERED=x
-v     : verbose (trace import statements); also PYTHONVERBOSE=x
         can be supplied multiple times to increase verbosity
-V     : print the Python version number and exit (also --version)
         when given twice, print more information about the build
-W arg : warning control; arg is action:message:category:module:lineno
         also PYTHONWARNINGS=arg
-x     : skip first line of source, allowing use of non-Unix forms of #!cmd
-X opt : set implementation-specific option
--check-hash-based-pycs always|default|never:
         control how Python invalidates hash-based .pyc files
--help-env: print help about Python environment variables and exit
--help-xoptions: print help about implementation-specific -X options and exit
--help-all: print complete help information and exit

Arguments:
file   : program read from script file
-      : program read from stdin (default; interactive mode if a tty)
arg ...: arguments passed to program in sys.argv[1:]

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Installation

Source code is obtained from Python

System

64-bit Linux