Practice with: loops, ord and chr to understand Upper and Lower case ASCII codes.

ASCII Play

#######################################
#
# asciiplay.py
# Algot Runeman
# November 11, 2012
# June 30, 2013 (reversed order of list)
#
#######################################

a = 'Jones'

for i in range(0,len(a)):
    print a[i]
    if ord(a[i]) > 64 and ord(a[i]) < 92:
        print "upper"
        
# cause an intentional break in the program
#import sys
# sys.exit("Error message")

# Upper case is chr(65) to chr(91)
for l in range(65, 91):
    print l, chr(l),
    
print '\nUpper and case'
print 'with their ascii values.'
# lower case is chr(97) through chr(122)
for l in range(97, 123):
    print chr(l-32), l-32, ':', l, chr(l)