#!/usr/bin/env python

#
# shows the use of some functions/methods, but primary
# purpose is to show the use of the % formatting strings
# that help us format our output.
# 
# don't worry about the math/computation, but focus on how
# the output format is used to line up/format the output
#
# ALSO - please notice the use of blank lines to *group* 
#        related chunks of code. You should do the same.
#
# e.bonakdarian    oct 2009


import math

########################################################
def poor_output():
    # without any formatting
    line = 1

    for i in range(-100, 1200, 100):
        print 'line:', line,' -  ', i, ' times', math.pi, 'is', (i * math.pi)
        line = line + 1



########################################################
def nicer_output():
    # using output formatting, code is easier
    # to format and read.
    # make changes to the formats and see what
    # can change.
    #
    line = 1

    for i in range(-100, 1200, 100):
        print('line: %3d: - %5d times %12.10f is %16.10f' %
              (line, i, math.pi, (i*math.pi)))
        line = line + 1



########################################################
def main():
    poor_output()
    print '------------------------------------------'
    print 'nicer output'
    print
    nicer_output()

    print '------------------------------------------'
    print 'some string formatting'
    print

    poet = 'Neruda'
    print 'poet: %s!' % poet
    print 'poet: %20s!' % poet
    print 'poet: %-20s!' % poet

main()