Python-Teaching: Difference between revisions

From Research Computing Center Wiki
Jump to navigation Jump to search
No edit summary
No edit summary
Line 9: Line 9:


=== Version ===
=== Version ===
3.6.4
3.5.2
   
   
=== Author / Distributor ===
=== Author / Distributor ===
Line 21: Line 21:
=== Running Program ===
=== Running Program ===


The last version of this application is at /usr/local/apps/eb/Python/3.6.4-foss-2018a
The last version of this application is at /usr/local/apps/eb/Python/3.5.2-foss-2016b


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/3.6.4-foss-2018a
ml Python/3.5.2-foss-2016b
</pre>  
</pre>  


Line 43: Line 43:
   
   
cd $SLURM_SUBMIT_DIR<br>
cd $SLURM_SUBMIT_DIR<br>
ml Python/3.6.4-foss-2018a<br>     
ml Python/3.5.2-foss-2016b<br>     
python <u>[options]</u><br>   
python <u>[options]</u><br>   
</div>
</div>
Line 59: Line 59:
   
   
<pre  class="gcommand">
<pre  class="gcommand">
ml Python/3.6.4-foss-2018a
ml Python/3.5.2-foss-2016b
python -h
python -h
usage: python [option] ... [-c cmd | -m mod | file | -] [arg] ...
usage: python [option] ... [-c cmd | -m mod | file | -] [arg] ...
Line 65: Line 65:
-b    : issue warnings about str(bytes_instance), str(bytearray_instance)
-b    : issue warnings about str(bytes_instance), str(bytearray_instance)
         and comparing bytes/bytearray with str. (-bb: issue errors)
         and comparing bytes/bytearray with str. (-bb: issue errors)
-B    : don't write .pyc files on import; also PYTHONDONTWRITEBYTECODE=x
-B    : don't write .py[co] 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    : debug output from parser; also PYTHONDEBUG=x
Line 79: Line 79:
-s    : don't add user site directory to sys.path; also PYTHONNOUSERSITE
-s    : don't add user site directory to sys.path; also PYTHONNOUSERSITE
-S    : don't imply 'import site' on initialization
-S    : don't imply 'import site' on initialization
-u    : force the binary I/O layers of stdout and stderr to be unbuffered;
-u    : unbuffered binary stdout and stderr, stdin always buffered;
        stdin is always buffered; text I/O layer will be line-buffered;
         also PYTHONUNBUFFERED=x
         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
Line 99: Line 98:
               default module search path.  The result is sys.path.
               default module search path.  The result is sys.path.
PYTHONHOME  : alternate <prefix> directory (or <prefix>:<exec_prefix>).
PYTHONHOME  : alternate <prefix> directory (or <prefix>:<exec_prefix>).
               The default module search path uses <prefix>/lib/pythonX.X.
               The default module search path uses <prefix>/pythonX.X.
PYTHONCASEOK : ignore case in 'import' statements (Windows).
PYTHONCASEOK : ignore case in 'import' statements (Windows).
PYTHONIOENCODING: Encoding[:errors] used for stdin/stdout/stderr.
PYTHONIOENCODING: Encoding[:errors] used for stdin/stdout/stderr.
Line 107: Line 106:
   set to an integer in the range [0,4294967295] to get hash values with a
   set to an integer in the range [0,4294967295] to get hash values with a
   predictable seed.
   predictable seed.
PYTHONMALLOC: set the Python memory allocators and/or install debug hooks
  on Python memory allocators. Use PYTHONMALLOC=debug to install debug
  hooks.


</pre>
</pre>

Revision as of 14:06, 10 August 2018

Category

Programming

Program On

Teaching

Version

3.5.2

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

The last version of this application is at /usr/local/apps/eb/Python/3.5.2-foss-2016b

To use this version, please load the module with

ml Python/3.5.2-foss-2016b 

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/3.5.2-foss-2016b
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/3.5.2-foss-2016b 
python -h
usage: python [option] ... [-c cmd | -m mod | file | -] [arg] ...
Options and arguments (and corresponding environment variables):
-b     : issue warnings about str(bytes_instance), str(bytearray_instance)
         and comparing bytes/bytearray with str. (-bb: issue errors)
-B     : don't write .py[co] files on import; also PYTHONDONTWRITEBYTECODE=x
-c cmd : program passed in as string (terminates option list)
-d     : debug output from parser; also PYTHONDEBUG=x
-E     : ignore PYTHON* environment variables (such as PYTHONPATH)
-h     : print this help message and exit (also --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     : optimize generated bytecode slightly; also PYTHONOPTIMIZE=x
-OO    : remove doc-strings in addition to the -O optimizations
-q     : don't print version and copyright messages on interactive startup
-s     : don't add user site directory to sys.path; also PYTHONNOUSERSITE
-S     : don't imply 'import site' on initialization
-u     : unbuffered binary stdout and stderr, stdin always buffered;
         also PYTHONUNBUFFERED=x
         see man page for details on internal buffering relating to '-u'
-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)
-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
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:]

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.
PYTHONFAULTHANDLER: dump the Python traceback on fatal errors.
PYTHONHASHSEED: if this variable is set to 'random', 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.

Back to Top

Installation

Source code is obtained from Python

System

64-bit Linux