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Full Discussion: python code...convert to ksh or sh
Top Forums Shell Programming and Scripting python code...convert to ksh or sh Post 302103917 by ghostdog74 on Monday 22nd of January 2007 10:09:17 AM
Old 01-22-2007
This Python script is very clear in what its supposed to do.

1) import random
This is a library to generate random numbers
In bash , you can use the RANDOM env variable
2)
Code:
NTRIALS = 10000
matches = 0

For these, they are the same as declaring shell variables
3)
Code:
for trial in range(NTRIALS): # Do a bunch of trials...
    taken = {} 
    for person in range(NPEOPLE): 
        day = random.randint(0, 365) 
        if day in taken:
            matches += 1 
            break # No need to look for more than one.
        taken[day] = 1

range(NTRIALS) will give you a range of values from 0 to 9999
so for trial in range(NTRIALs) is a for loop to generate these numbers. So this for loop will iterate 10000 times, starting from count 0.
matches+=1 is the same as matches = matches + 1, which in shell, you can use something like this (or other methods)
Code:
x=`echo "$x + 1" | bc`

taken = {} declares a dictionary, or a lookup table.
random.randint(0,365) will generate a random number in the range from 0 to 365. taken[day] = 1 means keep that random day number in the dictionary
with the value of 1.
taken will now contain for example:
Code:
taken = { 102:1 } # 102 generated from random.randint()

 

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LEARN ABOUT DEBIAN

dh_python

DH_PYTHON(1)							     Debhelper							      DH_PYTHON(1)

NAME

       dh_python - calculates Python dependencies and adds postinst and prerm Python scripts (deprecated)

SYNOPSIS

       dh_python [debhelperoptions] [-n] [-V version] [moduledirs...]

DESCRIPTION

       Note: This program is deprecated. You should use dh_python2 instead.  This program will do nothing if debian/pycompat or a Python-Version
       control file field exists.

       dh_python is a debhelper program that is responsible for generating the ${python:Depends} substitutions and adding them to substvars files.
       It will also add a postinst and a prerm script if required.

       The program will look at Python scripts and modules in your package, and will use this information to generate a dependency on python, with
       the current major version, or on pythonX.Y if your scripts or modules need a specific python version. The dependency will be substituted
       into your package's control file wherever you place the token ${python:Depends}.

       If some modules need to be byte-compiled at install time, appropriate postinst and prerm scripts will be generated. If already byte-
       compiled modules are found, they are removed.

       If you use this program, your package should build-depend on python.

OPTIONS

       module dirs
	   If your package installs Python modules in non-standard directories, you can make dh_python check those directories by passing their
	   names on the command line. By default, it will check /usr/lib/site-python, /usr/lib/$PACKAGE, /usr/share/$PACKAGE,
	   /usr/lib/games/$PACKAGE, /usr/share/games/$PACKAGE and /usr/lib/python?.?/site-packages.

	   Note: only /usr/lib/site-python, /usr/lib/python?.?/site-packages and the extra names on the command line are searched for binary (.so)
	   modules.

       -V version
	   If the .py files your package ships are meant to be used by a specific pythonX.Y version, you can use this option to specify the
	   desired version, such as 2.3. Do not use if you ship modules in /usr/lib/site-python.

       -n, --noscripts
	   Do not modify postinst/prerm scripts.

CONFORMS TO

       Debian policy, version 3.5.7

       Python policy, version 0.3.7

SEE ALSO

       debhelper(7)

       This program is a part of debhelper.

AUTHOR

       Josselin Mouette <joss@debian.org>

       most ideas stolen from Brendan O'Dea <bod@debian.org>

9.20120909							    2011-12-06							      DH_PYTHON(1)
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