how to pass html arrtibute to python script

I have a python script which validates ID no. I have html form too which I want to pass string of one field to python script and return answer. my script look like :

 #!/usr/bin/python
 import sys, string, re
 def checkID():
 error=False
 if len(sys.argv) <> 2:
    print "Error: Missing argument (Usage: id ID_Number\n"
 else:
    idNumber=sys.argv[1]
    for oneDigit in idNumber:
        if not(oneDigit in string.digits):
            error=True
            break
    if error:
        print "Error: Illegal ID number: '%s'\n" % idNumber
    else:
        if len(idNumber) > 9:
            error=True
            print "Error: ID number too long: '%s'\n" % idNumber
return error

badNumber = checkID(sys.argv[1])
newID = ''
if not badNumber:
    if len(sys.argv[1]) < 9:
        missingDigits = 9 - len(sys.argv[1])
        while missingDigits > 0:
            newID=newID+'0'
            missingDigits = missingDigits - 1
        newID = newID + sys.argv[1]
    else:
        newID = sys.argv[1]

theSum = 0
indexRange=[0,2,4,6]
for i in indexRange:
    digit = newID[i]
    num= int(digit)
    theSum = theSum + num
    num= int(newID[i+1]) * 2
    if num > 9:
        num1 = num / 10
        num2 = num % 10
        num = num1 + num2
    theSum = theSum + num
theSum = theSum + int(newID[8])
lastDigit = theSum % 10
if lastDigit <> 0:
    print '\nID number: "%s" is wrong\n' % str(newID)
else:
    print '\nID number: "%s" is valid\n' % str(newID)

So the python will check the string passes from html and validate it. how can I do it?