[Tutor] Newbie Question:Regarding Command line Parsing and Run Unix Shell Command

[Prasad Kotipalli]

Hello evryone

     I am a newbie to python. I have a makefile which i can compile in
UNIX/LINUX, But i
I am planning to write a python script which actually does what my
MAKEFILE does. The make file is

#Makefile and some scripts to give output
#numbers
#Change till sign #END
var1:=564-574
a1 = 23
b1 = 678
kxm = ixm_7.gh
out = c$(var1)_s.gh
imageim
#END
#other files
file1 = sec$(b1).jk
file2 = sgf$(a1)
file3 = p$(b1).gh
prg3scriptfile = prg3_produce.xx
findoutdir = Dir:~/home/
x=67
#work
evrything: prg1 script2 prg3 script4
withoutprg1: script2 prg3 script4
prg1:
        s$(ca)$(d) .

script2: Makefile
       ./script2 -i '$(file2)' -o '$(file1)' -a $(x) -n

prg3:
        : > $(prg3scriptfile)
>>  $(prg3scriptfile)

        prg3 $(prg3scriptfile)
        rm $(prg3scriptfile)
script4:
        ./script4 $(kxm) $(file2)  $(out)  $(var1)

I want to write a python script to replace this Makefile.
I Have tried using getopt/optparse for parsing command line options
How to Run  Unix shell command from python.

My Task is

Myprg.py a1 b1 kxm out

Kindly suggest me some ideas/comments.

I started writing the code
I started writing the script.. I have gone through documentation for
getopt

import string, getopt, sys
def usage():
    print '''myscript.py -- uses getopt to recognize options
Options: -n  -- No
         -t  -- T
         -h  -- help
         -i  -- i
         -o  -- Output:filename'''
    sys.exit(1)
def main():
    print "SYS ARGV: ", ",".join(sys.argv)
# Define the Options
Options = {
        'n:': 'Number=',
        't:': 'T',
        'h' : 'help',
        'i' : 'i',
        'o' : 'Output_file',
    }
shortOpts = ''.join(Options.keys())
longOpts  = Options.values()

try:
        (opts, args) = getopt.getopt(argv[1:], shortOpts, longOpts)
except getopt.error, msg:
        print "Unrecognized argument or option"
    # end try

for (opt, arg) in opts:

        if opt in ('-n', '--Number'):
            print '-n is the Number', Number
            sys.exit()

        elif opt in ('-t', '--T'):
            print '-t is the T', T
            sys.exit()

        elif opt in ('-h', '--help'):
            usage()
            print " "
            sys.exit()

        elif opt in ('-i', '--i'):
            print " I", i

        elif opt  in ('-o', '--Output Filename'):
            print "Output", Output
        # end if
       # end for

            print "OPTS: ", ",".join([repr(o) for o in opts])
            print "ARGS: ", ",".join(args)

if __name__ == "__main__":
    main()

with the above code, I am planning to do command line parsing. But how
to run unix shell command? DO i have to use os Module/  import command?

How should i proceed further, to
 import commands
 commands.getstatusoutput('ls /bin/ls')

Please suggest me some ideas how to proceed further

Thanks
koid wayne