#ex.13

from sys import argv
script, first, second, third = argv
print "The script is called:", script
print "Your first variable is:", first
print "Your second variable is:", second
print "Your third variable is:", third

#ex.17
from sys import argv
from os.path import exists

script, from_file, to_file = argv

print "Copying from %s to %s" % (from_file, to_file)

in_file = open(from_file)
indata = in_file.read()

print "The input file is %d bytes long" % len(indata)

print "Does the output file exist? %r" % exists(to_file)
print "Ready, hit RETURN to continue, CTRL- C to abort."
raw_input()

out_file = open(to_file, 'w')
out_file.write(indata)

print "Alright, all done."

out_file.close()
in_file.close()

#ex.18
def print_two(*args):
    arg1, arg2 = args
    print ("arg1: %r, arg2: %r" % (arg1, arg2))
     
def print_two_again(arg1, arg2):
    print ("arg1: %r, arg2: %r" % (arg1, arg2))
     
def print_one(arg1):
    print ("arg1: %r" % arg1)
     
def print_none():
    print ("I got nothin'.")
     
print_two("Zed","Shaw")
print_two_again("Zed","Shaw")
print_one("First!")
print_none()
  File "<input>", line 5
    def print_two_again(arg1, arg2):
        
#ex.19
def cheese_and_crackers(cheese_count, boxes_of_crackers):
	print "You have %d cheeses!" % cheese_count
	print "You have %d boxes of crackers!" % boxes_of_crackers
	print "Man that's enough for a party!"
	print "Get a blanket.\n"


print "We can just give the function numbers directly:"
cheese_and_crackers(20, 30)

print "OR, we can use variables from our script:"
amount_of_cheese = 10
amount_of_crackers = 50

cheese_and_crackers(amount_of_cheese, amount_of_crackers)

print "We can even do math inside too:"
cheese_and_crackers(10 + 20, 5 + 6)


print "And we can combine the two, variables and math:"
cheese_and_crackers(amount_of_cheese + 100, amount_of_crackers +1000)

#ex.19
def cheese_and_crackers(cheese_count, boxes_of_crackers):
    print ("You have %d cheeses!" % cheese_count)
    print ("You have %d boxes of crackers!" % boxes_of_crackers)
    print ("Man that's enough for a party!")
    print ("Get a blanket.\n")
    
print ("We can just give the function numbers directly:")
cheese_and_crackers(20, 30)
    
print ("OR, we can use variables from our script:")
amount_of_cheese = 10
amount_of_crackers = 50
    
cheese_and_crackers(amount_of_cheese, amount_of_crackers)
    
print ("We can even do math inside too:")
cheese_and_crackers(10 + 20, 5 + 6)
    
print ("And we can combine the two, variables and math:")
cheese_and_crackers(amount_of_cheese + 100, amount_of_crackers + 1000)