randFile.py - Selector aleatorio de archivos

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#!/usr/bin/python
# -*- coding: UTF-8 -*-

# Original file created by Luis Felipe Abad Guzmán
# from the Pulpa linux users group
# http://pulpa.utp.edu.co
# Released under the GPL licence

from sys import *
from random import *
from optparse import OptionParser
from os import *
if __name__ == "__main__":
	desc = "Select a random file from <directory> and use it as a command line argument for <action>. <action> may contain any command available to the user. The selected filename and path will be inserted at the end of <action> or in any place where the token $@ is found."
	use = "[-d <directory>] [-a <action>]"
	parser = OptionParser(usage = use, description = desc)

	parser.add_option("-d", "--directory", dest = "dirname", default = "./", metavar = "<directory>", help = "Specify a directory containing some files, one of which will be used. If this option is ommited, then the current directory will be used.")
	parser.add_option("-a", "--action", dest = "action", default = "echo \"$@\"", metavar = "<action>", help = "Specify an action string to be used with the path and filename of the selected file. If the action string contains $@ tokens, these will be replaced with \"/path/filename\". Else the \"/path/filename\" string will be appended at the end. Default action is 'echo $@'.")

	(Options, args) = parser.parse_args()

	selectable = []
	#Traverse <directory>. Add filenames to the selectable list
	if path.isdir(Options.dirname):
		contents = listdir(Options.dirname)
		for elem in contents:
			if path.isfile(Options.dirname+'/'+elem):
				selectable.append(elem)

	selected = choice(selectable)
	action = Options.action.replace("$@", '"'+path.abspath(Options.dirname+'/'+selected)+'"')
	system(action)