rootver3.py

#!/usr/bin/env python
#
# Author:  Yotam Medini  [email protected] -- Created: 2006/June/01
#
# print_root Version 3 - demonstarting function with default values
#

import sys


# Version 3.0
def print_root(a, order=2, f=sys.stdout):
    low = 0.
    high = a + 1.
    progress = True
    while progress:
        mid = (low + high) / 2.
        progress = (low < mid < high); #
        if mid**order < a:
            low = mid
        else:
            high = mid
    f.write("root(%4g) = %f\n" % (a, mid))


# Demo Application
def application1():
    sys.stdout.write("\nApplication-1:\n")
    for n in range(0, 11):
        print_root(n)


# Demo Application
def application2():
    sys.stdout.write("\nApplication-2:\n")
    for order in [2, 3]:
        sys.stdout.write("\nRoots of order=%d\n" % order)
        for n in range(0, 10):
            print_root(n, order)


# Demo Application
def application3():
    html_filename = "/tmp/roots.html"
    html = open(html_filename, "w")
    html.write("""
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head><title>Roots</title><body>
"""[1:]) # skip the 1st newline char.
    
    html.write("</body></html>\n")
    for order in range(2, 6):
        html.write("<h2>Roots of order %d</h2>\n" % order)
        for n in [10, 100, 1000, 2000, 2006]:
            print_root(n, order, html)
            html.write("<br>\n") # Newline 
    html.close()
    sys.stdout.write("Now use FireFox to show %s !!\n" % html_filename)


# Main program
application1()
application2()
application3()
sys.exit(0)
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