Chapter 23: Library Support for Numbers and Character Data

Example tclassify.c, Page 613

import string
print " alnum alpha digit graph lower print punct space upper xdigit"
p="azAZ0 !\t"
p1=list(p)
for i in p1:
    listt=[" "]*10
    print i,
    if(i.isalnum()):
        listt[0]=" X"
    if(i.isalpha()):
        listt[1]=" X"
    if(i.isdigit()):
        listt[2]=" X"
    if(i.isspace()!=True):
        listt[3]=" X"
    if(i.islower()):
        listt[4]=" X"
    if(i in string.printable):
        listt[5]=" X"
    if(i in string.punctuation):
        listt[6]=" X"
    if(i.isspace()):
        listt[7]=" X"
    if(i.isupper()):
        listt[8]=" X"
    if(i in string.hexdigits):
        listt[9]=" X"
    print listt

 alnum alpha digit graph lower print punct space upper xdigit
a [' X', ' X', ' ', ' X', ' X', ' X', ' ', ' ', ' ', ' X']
z [' X', ' X', ' ', ' X', ' X', ' X', ' ', ' ', ' ', ' ']
A [' X', ' X', ' ', ' X', ' ', ' X', ' ', ' ', ' X', ' X']
Z [' X', ' X', ' ', ' X', ' ', ' X', ' ', ' ', ' X', ' ']
0 [' X', ' ', ' X', ' X', ' ', ' X', ' ', ' ', ' ', ' X']
  [' ', ' ', ' ', ' ', ' ', ' X', ' ', ' X', ' ', ' ']
! [' ', ' ', ' ', ' X', ' ', ' X', ' X', ' ', ' ', ' ']
	[' ', ' ', ' ', ' ', ' ', ' X', ' ', ' X', ' ', ' ']

Example tcasemap.c, Page 615

p="aA0!"
pl=list(p)
for i in pl:
    print "tolower('%c') is '%c'; "% (i,i.lower()),
    print "toupper('%c') is '%c'; "% (i,i.upper())

tolower('a') is 'a';  toupper('a') is 'A'; 
tolower('A') is 'a';  toupper('A') is 'A'; 
tolower('0') is '0';  toupper('0') is '0'; 
tolower('!') is '!';  toupper('!') is '!';