Every once in a while I wish I had an ASCII ruler so I could see how
many columns wide some line of text was. So:
#!/usr/bin/env python
"""Computes an ASCII ruler up to the specified width.
On the command-line: use -a or --ansi to specify ANSI escape s
"""
import sys, getopt
__author__ = "Kragen Sitaker <[EMAIL PROTECTED]>"
__version__ = "2"
def ruler(width, ansi=0):
"""Return an ASCII ruler for counting columns."""
rv = ''
for i in range(1, width+1):
if i % 10 != 0:
rv = rv + str(i % 10)
else:
digit = str((i/10)%10)
# red foreground 33, bold 5, reset to default 0
if ansi: rv = rv + "\033[31;5m" + digit + "\033[0m"
else: rv = rv + digit
return rv + "\n"
def main(argv):
"""Command-line interface."""
usagemsg = "%s: usage: %s [-a|--ansi] [width]\n" % (argv[0], argv[0])
try:
opts, args = getopt.getopt(argv[1:], "ahv",
["ansi", "help", "version"])
except getopt.GetoptError, v:
sys.stderr.write(str(v) + "\n")
sys.stderr.write(usagemsg)
sys.exit(-1)
optnames = [ opt for (opt, arg) in opts ]
if "--version" in optnames or "-v" in optnames:
print "ruler version " + __version__
elif "--help" in optnames or "-h" in optnames or len(args) > 1:
print usagemsg,
else:
if len(args): width = int(args[0])
else: width = 79
print ruler(width, "-a" in optnames or "--ansi" in optnames),
if __name__ == "__main__": main(sys.argv)
