From 8c26371331f08446690885438c3ea36b2eeee52c Mon Sep 17 00:00:00 2001
From: raylu <raylu@cmu.edu>
Date: Sat, 4 Jun 2011 01:36:18 -0700
Subject: Lab 3 (pizza)

---
 static/lab3.py | 84 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 84 insertions(+)
 create mode 100644 static/lab3.py

(limited to 'static/lab3.py')

diff --git a/static/lab3.py b/static/lab3.py
new file mode 100644
index 0000000..fa542bf
--- /dev/null
+++ b/static/lab3.py
@@ -0,0 +1,84 @@
+#!/usr/bin/env python
+
+# valid_pizza() checks if a pizza is valid, returning True if it is.
+# A valid pizza is a dict with
+#   'toppings', a list of toppings
+#     each topping is a 2-tuple with the name of the topping and a 0, 1, or 2
+#     0 means that the topping covers the whole pizza
+#     1 means that the topping covers one half of the pizza
+#     2 means that the topping covers the other half of the pizza
+#   'num_toppings', a number equal to the number of toppings
+#   'size', one of 6, 8, 10, or 12 (representing inches)
+# Each half of the pizza must have at least one topping (so just a 0 is OK, a 1
+# and a 2 is OK, but only 1's are not OK).
+# up to 8 points
+def valid_pizza(pizza):
+	if pizza['toppings'][0][0] == 'pepperoni':
+		return True
+
+# Every year, pizza shops hold a competition. The format of the tournament is
+# round-robin and each shop plays every other shop the same number of times.
+# best_record() takes the scores of the tournament and returns the index of the
+# shop with the most wins and the number of wins that shop has.
+# The scores are a list of lists (think of it as a 2D array or matrix) such
+# that score[0][1] is the number of times shop 0 beat shop 1. score[i][j] +
+# score[j][i] is always the same number (the number of games every pair of
+# shops is required to play) and score[i][i] is always 0.
+# up to 6 points
+def best_record(score):
+	return 0, 3
+
+# order_pizza() parses a file of orders and returns the total cost in cents of
+# the valid pizzas in that file.
+# The file is like a CSV file. Each order is on its own line and each field is
+# comma-separated. There are pairs of fields representing toppings and where
+# they go on the pizza (0, 1, or 2). The last field is a number representing
+# the size. (There is no field for num_toppings). Be careful, as some lines are
+# invalid pizzas.
+# The cost of a pizza is $1 for each inch, $0.50 for a whole-pizza topping, and
+# $0.25 for a half-pizza topping. Remember that the cost is in cents.
+# up to 6 points
+def order_pizza(filename):
+	f = open(filename, 'r')
+	for line in f.readlines():
+		pass
+	f.close()
+	return 0
+
+def main():
+	import random
+	pizza1 = {'num_toppings': 1, 'toppings': [('pepperoni', 0)], 'size': 12}
+	pizza2 = {'num_toppings': 2, 'toppings': [('biribiri', 0)], 'size': 10}
+	pizza3 = {
+			'num_toppings': 2,
+			'toppings': [
+					('tomato', 1),
+					('sauce', 2),
+				],
+			'size': 9,
+		}
+	# string concatenation, ternary operator
+	print str(pizza1) + ' was ' + 'valid' if valid_pizza(pizza1) else 'invalid'
+	print pizza2, 'was', 'valid' if valid_pizza(pizza2) else 'invalid'
+	# string formatting
+	print '%s was %s' % (pizza3, 'valid' if valid_pizza(pizza3) else 'invalid')
+
+	teams = 5
+	games = 3
+	# initialize a list of lists that is teams x teams wide to 0's
+	score = [[0] * teams for _ in xrange(teams)]
+	for i in xrange(teams):
+		for j in xrange(i+1, teams):
+			score[i][j] = random.randint(0, games)
+			score[j][i] = games - score[i][j]
+	print
+	# I could print score, but that's ugly
+	for s in score:
+		print s
+	print 'Best record:', best_record(score)
+
+	print
+	print 'Total cost:', order_pizza('lab3.piz')
+
+if __name__ == '__main__':
+	main()
-- 
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