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Top Forums Shell Programming and Scripting Unable to store "python --version" to a shell variable Post 302903231 by srinivasan.neel on Monday 26th of May 2014 09:11:01 AM
Old 05-26-2014
Unable to store "python --version" to a shell variable

Hi All,
I need to get the version of python installed and store it in a variable for later use. Whereas it is printing on the console instead of storing to variable. I am able to store output of ls command in a variable. Please check the below code :
Code:
root@myhost:/volumes/srini# cat python_version.sh 
python_version=python --version
echo "****"
echo $python_version
echo "****"
ls_output=ls -l python*
echo "****"
echo $ls_output
echo "****"

Please check the output of the code :
Code:
root@myhost:/volumes/srini# ./python_version.sh 
Python 2.6.8
****

****
****
-rwxr-xr-x 1 root root 147 May 26 09:35 python_version.sh
****

Please note, its able to store output of ls command in a variable, but not of python --version. Its directly displaying in console.

Regards,
Srinivasan

Last edited by srinivasan.neel; 05-26-2014 at 10:35 AM.. Reason: sorry for the typo, even after changing that also its not getting stored in variable
 

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echo(1B)					     SunOS/BSD Compatibility Package Commands						  echo(1B)

NAME
echo - echo arguments to standard output SYNOPSIS
/usr/ucb/echo [-n] [argument] DESCRIPTION
echo writes its arguments, separated by BLANKs and terminated by a NEWLINE, to the standard output. echo is useful for producing diagnostics in command files and for sending known data into a pipe, and for displaying the contents of envi- ronment variables. For example, you can use echo to determine how many subdirectories below the root directory (/) is your current directory, as follows: o echo your current-working-directory's full pathname o pipe the output through tr to translate the path's embedded slash-characters into space-characters o pipe that output through wc -w for a count of the names in your path. example% /usr/bin/echo "echo $PWD | tr '/' ' ' | wc -w" See tr(1) and wc(1) for their functionality. The shells csh(1), ksh(1), and sh(1), each have an echo built-in command, which, by default, will have precedence, and will be invoked if the user calls echo without a full pathname. /usr/ucb/echo and csh's echo() have an -n option, but do not understand back-slashed escape characters. sh's echo(), ksh's echo(), and /usr/bin/echo, on the other hand, understand the black-slashed escape characters, and ksh's echo() also understands a as the audible bell character; however, these commands do not have an -n option. OPTIONS
-n Do not add the NEWLINE to the output. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWscpu | +-----------------------------+-----------------------------+ SEE ALSO
csh(1), echo(1), ksh(1), sh(1), tr(1), wc(1), attributes(5) NOTES
The -n option is a transition aid for BSD applications, and may not be supported in future releases. SunOS 5.11 3 Aug 1994 echo(1B)
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