hex2asc.py 0.0.1, a converter to ascii characters from hex strings. Basic Usage: $ hex2asc.py --space 41 41 41 AAA $ hex2asc.py 414141 AAA --- i have to finish a repot of phisics...

hex2asc.py

#!/usr/bin/env python2

# -*- coding: utf-8 -*-

import sys

argc = len(sys.argv)
argv = sys.argv

def ShowUsage():
    print  """
hex2asc.py 0.0.1, a converter to ascii characters from hex strings.

Basic Usage:
    	$ hex2asc.py
	[Show this message.]
	
	$ hex2asc.py --help
	[Show this message.]

	$ hex2asc.py --space 41 41 41
	AAA

	$ hex2asc.py 414141
	AAA

"""
    exit(0)

def ShowError(mes):
    print "Error: "+mes
    exit(-1)

def IsRangeOfASCIIChar(ch):
    if (0x20 <= int(ch, 16)) and (int(ch, 16) <= 0x7e):
	return chr(int(ch, 16))
    else:
	return ""

l = []
if argc < 2:
    ShowUsage()
if argv[1] == "--space":
    for i in argv[2:]:
	try:
	    l += IsRangeOfASCIIChar(i)
	except ValueError:
	    ShowError('ValueError')

elif argv[1] == "--help":
    ShowUsage()
else:
    str = argv[1]
    if not len(str)%2:
	length = len(str)/2
    else:
	print "Error: argument is not even number"
	sys.exit(-1)
    for i in range(length):
	tmp = str[0+i*2:2+i*2]
	try:
	    l += IsRangeOfASCIIChar(tmp)
	except ValueError:
	    ShowError('ValueError')
	except TypeError:
	    ShowError('TypeError')

if l == []:
    print "Aborting..."
    sys.exit(-1)

print "".join(l)