week 5

week 5/Bubble_sort.md

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+files:
+ Bubble sorting_algorithm.ppt
+ bubble_sort_non-function_function_version.txt

week 5/Code on the fly.md

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+    Simple menu that calls a function
+
+files:
+ menusample.py

week 5/Discount.md

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+    Write a program for calculating the purchase price, taking into account the discount. 
+
+    A 3% discount is provided if the purchase amount is more than £500, 
+
+    and 5% - if the amount is more than £1000.

week 5/Discount.py

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+def int_input(text):
+	while True:
+		try:
+			user_input = int(input(text))
+			return user_input
+		except Exception:
+			print("error")
+		else:
+			break
+
+
+total = int_input("enter total cost: ")
+if total >1000:
+	total=total*0.95
+elif total>500:
+	total=total*.97
+print("final price: ",total)

week 5/Guess the number/Activity 1.md

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+    Work in pairs
+
+    Play - guess the number. Here is the algorithm:
+
+    Welcome the player to the game and explain it.
+
+    Pick a random number between 1 and 100
+
+    ask the player for a guess
+
+    set the number of guesses to 1
+
+    while the player's guess does not equal the number
+
+    if the guess is greater than the number
+
+    tell the player to guess lower
+
+    otherwise
+
+    tell the player to guess higher
+
+    get a new guess from the player
+
+    increase the number of guesses by 1
+
+    congratulate the player on guessing the number
+
+    let the player know how many guesses it took
+
+    Develop the code for this program.
+
+    Test your solution

week 5/Guess the number/Activity 2.md

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+Limit the player to 6 guesses.
+
+Adjust the algorithm.
+
+Adjust the code
+
+Test the revised version of the game

week 5/Guess the number/Activity 3.md

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+    Here's a bigger challenge..........
+
+    Write the pseudocode for a program where the player and the computer trade places in the number guessing game. That is, the player picks a random number between 1 and 100 that the computer has to guess. Before you start, think about how you guess. If all goes well, try coding the game

week 5/Guess the number/main.py

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+"""
+already did it:
+https://github.com/winneratwin/numberguesser-using-functions
+"""

week 5/Local and Global variables/Local \ global.md

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+    2 programs to demonstrate the scope of local and global variables
+
+files:
+ global_local.py
+ global_reach(1).py

week 5/Local and Global variables/global_local.py

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+# Global Reach
+# Demonstrates global / local variables
+
+def read_global():
+    print ("From inside the local scope of read_global(), value is:", value)
+
+def local_variable():
+    value = -10
+    print ("From inside the local scope of local_variable(), value is:", value)
+    return value
+
+def change_global():
+    global value
+    value += 100
+    print ("From inside the local scope of change_global(), value is:", value)
+
+# main
+# value is a global variable because we're in the global scope here
+value = 10
+print ("In the global scope, value has been set to:", value, "\n")
+
+read_global()
+print ("Back in the global scope, value is still:", value, "\n")
+
+value =local_variable()
+
+print ("Back in the global scope, value is still:", value, "\n")
+
+change_global()
+print ("Back in the global scope, value has now changed to:", value)
+
+#raw_input("\n\nPress the enter key to exit.")
+
+
+
+
+
+
+
+
+
+

week 5/Local and Global variables/global_reach(1).py

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+# Global Reach
+# Demonstrates global variables
+
+def read_global():
+    print ("From inside the local scope of read_global(), value is:", value)
+
+def shadow_global():
+    value = -10
+    print ("From inside the local scope of shadow_global(), value is:", value)
+  
+def change_global():
+    global value
+    value = -10
+    print ("From inside the local scope of change_global(), value is:", value)
+
+# main
+# value is a global variable because we're in the global scope here
+value = 10
+print ("In the global scope, value has been set to:", value, "\n")
+
+read_global()
+print ("Back in the global scope, value is still:", value, "\n")
+
+shadow_global()
+print ("Back in the global scope, value is still:", value, "\n")
+
+change_global()
+print ("Back in the global scope, value has now changed to:", value)
+
+#raw_input("\n\nPress the enter key to exit.")
+
+
+
+
+
+
+
+
+
+

week 5/Sample Menu program.md

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+    This program demonstrates the use of functions in a menu driven program
+
+    Task 1 - Modify this program to create a fourth function to display "Bye" message
+
+files:
+ menuexample.py

week 5/Sample Menu program.py

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+def checkBalance(number):
+    print ("Showing balance for account number " + number)
+
+def addMoney(existing, deposit):
+    new_balance = existing + deposit
+    return new_balance
+
+
+### why tf was this not a function already
+def main():
+	#main thread of menu
+	finished = False
+	while not finished:
+		choice = input ("Hit 1, 2, 3, 4 or 0 to quit >> ")
+		while not choice in ['1', '2', '3', '4', '0']:
+			choice = input("That was not a valid selection, try again >> ")
+		print ("You chose " + choice)
+
+		if choice == '1':
+			number = input ("Enter account number >> ")
+			checkBalance(number)
+
+		if choice == '2':
+			existing = input ("Enter current balance >> ")
+			existing = float(existing)
+			deposit = input ("Enter amount to be deposited >> ")
+			deposit = float (deposit)
+			newbalance = addMoney(existing, deposit)
+			print ("Your new balance is £" + str(newbalance))
+
+		if choice == '0':
+			finished = True
+	goodbye()
+
+def goodbye():
+	print ("Goodbye!")
+# did you know that if you included a python file it is 
+# actually run so if you don't use this to ensure that this 
+# file is the main thread then it would run when in a include statement
+if __name__ == "__main__": 
+	main()

week 5/Sample Program 2/Receive and return.md

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+    One function receives a value
+
+    The next function returns a value
+
+    The last function both receives and returns a value
+
+files:
+ receive_and_return.py

week 5/Sample program 1/Dragon Realm.md

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+    This program featured in the inventdotpython.com site demonstrates the use of user defined functions
+
+files:
+ dragon.py

week 5/Sample program 1/dragon.py

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+import random
+import time
+
+def displayIntro():
+    print('You are in a land full of dragons. In front of you,')
+    print('you see two caves. In one cave, the dragon is friendly')
+    print('and will share his treasure with you. The other dragon')
+    print('is greedy and hungry, and will eat you on sight.')
+    print()
+
+def chooseCave():
+    cave = ''
+    while cave != '1' and cave != '2':
+        print('Which cave will you go into? (1 or 2)')
+        cave = input()
+
+    return cave
+
+def checkCave(chosenCave):
+    print('You approach the cave...')
+    time.sleep(2)
+    print('It is dark and spooky...')
+    time.sleep(2)
+    print('A large dragon jumps out in front of you! He opens his jaws and...')
+    print()
+    time.sleep(2)
+
+    friendlyCave = random.randint(1, 2)
+
+    if chosenCave == str(friendlyCave):
+         print('Gives you his treasure!')
+    else:
+         print('Gobbles you down in one bite!')
+
+playAgain = 'yes'
+while playAgain == 'yes' or playAgain == 'y':
+
+    displayIntro()
+
+    caveNumber = chooseCave()
+
+    checkCave(caveNumber)
+
+    print('Do you want to play again? (yes or no)')
+    playAgain = input()

week 5/Some code snippets to demonstrate loops and functions.md

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+files:
+ calculation.py
+ condloop.py
+ functions.py

week 5/Task 1.md

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+	Analyse this code.
+
+	A function is called but no parameters are passed to or from the function.
+
+	Create a program which calls a function to print "Happy Birthday to You" 4 times
+files:
+ noparameters.py

week 5/Task 1.py

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+#Demonstrates calling a function
+#the function is first of all defined
+
+def reuseme(var):
+    print (var)
+
+#main
+
+counter = 0
+while counter < 4:
+    reuseme("Happy Birthday to You")
+    counter+=1
+
+
+
+
+

week 5/Task 2.md

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+
+
+    Analyse this program.
+
+    A function is called and a parameter is passed to the function
+
+    Amend your Happy Birthday program created in Task 1 to pass a variable name to the function and print a message such as:
+
+    Happy Birthday to Sue!
+
+    Happy Birthday to Sue!
+
+    Happy Birthday to Sue!
+
+    Happy Birthday to Sue!
+
+    Happy Birthday to Sue!

week 5/Task 2.py

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+#Demonstrates calling a function
+#the function is first of all defined
+
+def reuseme(name):
+    print ("Happy Birthday to {}!".format(name))
+
+#main
+
+counter = 0
+while counter < 4:
+    reuseme("Sue")
+    counter+=1
+
+
+
+
+

week 5/Task 4.py

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+#-------------------------------------------------------------------------------
+# Name:        module1
+# Purpose:
+#
+# Author:      pcum
+#
+# Created:     
+# Copyright:   (c) 
+# Licence:     <your licence>
+#-------------------------------------------------------------------------------
+#!/usr/bin/env python
+import random
+
+def displayIntro():
+    print ("Welcome to the football match prediction program")
+
+
+def chooseTeam():
+    team = input("Please Enter the name of Team")
+    return team
+
+def score():
+    score = random.randint(0,9)
+    return score
+
+def printscore(team, teamscore):
+    print (str(team)+"  "+str(teamscore))
+
+
+def checkresult(team1score,team2score):
+    if team1score == team2score:
+        print ("Re-match required")
+
+
+# main program
+#this function introduces the program which predicts the results of football matches
+displayIntro()
+
+#chooseTeam is called up twice and each time returns
+#the name of a football team
+team1 = chooseTeam()
+team2 = chooseTeam()
+
+#function score is called up and passed the team variable
+#a score (between 0 and 9) is randomly calculated for the team and returned
+team1score = score()
+team2score = score()
+
+#function printscore is called up twice
+printscore(team1, team1score)
+printscore(team2, team2score)
+
+#function to check to see if the result is a draw - if it is a re-match message is displayed
+checkresult(team1score,team2score)
+
+

week 5/What are functions.md

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+    Python has lots of pre-made functions, that you can use right now, simply by 'calling' them. 'Calling' a function involves you giving a function input, and it will return a value as output.
+
+    You have already used the random functions to generate random numbers
+
+    Python also lets you create functions of your very own.
+
+files:
+  Functions.ppt

week 5/calculation.py

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+def calculation():
+    input1 = input ("Put in the first number here ")
+    num1 = int(input1)
+    input2 = input ("Put in your second number here ")
+    num2 = int(input2)
+    command = input ("Type a to add and b to subtract")
+    if (command == "a"):
+        answer = num1 + num2
+    elif (command == "b"):
+        answer = num1 - num2
+    else:
+        answer = 0
+    print ("The result was " + str(answer))
+
+print ("What would you like to do today?")
+calculation()
+reply = input("Would you like to do another, or hit q to quit")
+while (reply != "q"):
+   calculation()
+   reply = input("Would you like to do another, or hit q to quit")
+print ("Goodbye!")

week 5/condloop.py

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+print ("Hello, I am Marvin, your personal bot")
+print ("What can I do for you today?")
+finished = False
+counter = 0
+#this is a boolean flag that will tell us to carry on, or kill, the loop
+while not finished:
+    counter = counter + 1
+    print ("This is the body of the loop")
+    print ("Do you want to add, subtract, multiply or divide?")
+    answer = input("Write your command here!  bye makes it quit.")
+    if (answer == "bye"):
+        finished = True
+print ("Goodbye! You took " + str(counter) + " tries to get it right.")

week 5/footballdemo.py

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+#-------------------------------------------------------------------------------
+# Name:        module1
+# Purpose:
+#
+# Author:      anon
+#
+# Created:     
+# Copyright:   (c) 
+# Licence:     all rights reserved
+#-------------------------------------------------------------------------------
+#!/usr/bin/env python
+import random
+
+def displayIntro():
+    print ("Welcome to the football match prediction program")
+
+
+def chooseTeam():
+    team = input("Please Enter the name of Team")
+    return team
+
+def score():
+    score = random.randint(0,9)
+    return score
+
+def printscore(team, teamscore):
+    print (str(team)+"  "+str(teamscore))
+
+
+def checkresult(team1score,team2score):
+    if team1score == team2score:
+        print ("Re-match required")
+
+
+# main program
+#this function introduces the program which predicts the results of football matches
+displayIntro()
+
+#chooseTeam is called up twice and each time returns
+#the name of a football team
+team1 = chooseTeam()
+team2 = chooseTeam()
+
+#function score is called up and passed the team variable
+#a score (between 0 and 9) is randomly calculated for the team and returned
+team1score = score()
+team2score = score()
+
+#function printscore is called up twice
+printscore(team1, team1score)
+printscore(team2, team2score)
+
+#function to check to see if the result is a draw - if it is a re-match message is displayed
+checkresult(team1score,team2score)
+
+

week 5/functions.py

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+def sample_function():
+    print ("this is a function")
+    print ("and this is some stuff that it does")
+    answer = input ("Enter some stuff here")
+    print ("you wrote " + answer)
+
+#stub procedures
+def deposit():
+    print ("Deposit goes here")
+    pass
+
+def withdraw():
+    print ("Withdraw goes here")
+    pass
+
+def check():
+    print ("Check balance here")
+    pass
+
+#main thread
+print ("Welcome to the Bank of Mum")
+answer = input ("1 to deposit, 2 withdraw, 3 check balance, 0 to quit")
+if (answer == "1"):
+    deposit()
+elif (answer == "2"):
+    withdraw()
+elif (answer == "3"):
+    check()
+else:
+    print ("Goodbye!")

week 5/maths(1).py

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+#open the previous hiscore file and read it in
+with open ("highscores.txt", "r")as file:
+    highscore = file.read()
+    highscore = int(highscore)
+    print ("The previous highscore was " + str(highscore))
+
+score = 0
+print ("Welcome to the Maths quiz!")
+print ("Here comes the first question!")
+
+print ("Your score is currently " + str(score))
+print ("The current highscore is " + str(highscore))
+
+#first question
+print ("What is the value of 2 x 2 x 2?")
+answer = int(input("Type your answer here >> "))
+if answer == 8:
+    score = score + 1
+    print ("Woo hoo!  That was correct!")
+    print ("Your score is now " + str(score))
+else:
+    print ("Boo hiss ... the answer was 8 :( ")
+    print ("Your score is now " + str(score))
+
+#second question
+print ("What is the square root of 121?")
+answer = int(input("Type your answer here >> "))
+if answer == 11:
+    score = score + 1
+    print ("Woo hoo!  That was correct!")
+    print ("Your score is now " + str(score))
+else:
+    print ("Boo hiss ... the answer was 11 :( ")
+    print ("Your score is now " + str(score))
+
+#third question
+print ("If you divide 23 by 5, what is the remainder?")
+answer = int(input("Type your answer here >> "))
+if answer == 3:
+    score = score + 1
+    print ("Woo hoo!  That was correct!")
+    print ("Your score is now " + str(score))
+else:
+    print ("Boo hiss ... the answer was 3 :( ")
+    print ("Your score is now " + str(score))
+
+#fourth question
+print ("What is the binary value 1101 in decimal?")
+answer = int(input("Type your answer here >> "))
+if answer == 13:
+    score = score + 1
+    print ("Woo hoo!  That was correct!")
+    print ("Your score is now " + str(score))
+else:
+    print ("Boo hiss ... the answer was 13 :( ")
+    print ("Your score is now " + str(score))
+
+if score > highscore:
+    highscore = score
+
+print ("Your score was " + str(score))
+print ("The current highscore is " + str(score))
+
+with open ("highscores.txt", "w")as file:
+    file.write(str(highscore))

week 5/menuexample.py

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+#Caroline Norton
+#19 January 2010
+import sys
+
+#function to print a classcode
+def printclass():
+    print "B4DD-F091A"
+
+#function to print a name
+def printmyname(myname):
+    print myname
+
+#function to print hello
+def printhello():
+    print "hello"
+
+#start of main program (top level algorithm)
+answer=0
+while answer !="4":  #controls menu
+    print """Menu
+        1) 1:Print myname
+        2) 2:Print classcode              #choices in menu
+        3) 3:Print hello
+        4) 4:Exit"""
+    answer = raw_input("Make a selection> ")   # user input
+
+    if answer == "1":printmyname("fred")     # calls function
+    if answer == "2": printclass()
+    if answer == "3": printhello()
+    if answer == "4": print "Bye"
+
+

week 5/menusample.py

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+def checkBalance(number):
+    print ("Showing balance for account number " + number)
+
+def addMoney(existing, deposit):
+    new_balance = existing + deposit
+    return new_balance
+
+#main thread of menu
+finished = False
+while not finished:
+    choice = input ("Hit 1, 2, 3, 4 or 0 to quit >> ")
+    while not choice in ['1', '2', '3', '4', '0']:
+        choice = input("That was not a valid selection, try again >> ")
+    print ("You chose " + choice)
+
+    if choice == '1':
+        number = input ("Enter account number >> ")
+        checkBalance(number)
+
+    if choice == '2':
+        existing = input ("Enter current balance >> ")
+        existing = float(existing)
+        deposit = input ("Enter amount to be deposited >> ")
+        deposit = float (deposit)
+        newbalance = addMoney(existing, deposit)
+        print ("Your new balance is £" + str(newbalance))
+
+    if choice == '0':
+        finished = True
+print ("Goodbye!")

week 5/noparameters.py

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+#Demonstrates calling a function
+#the function is first of all defined
+
+def reuseme():
+    print ("Hip Hip Horray")
+
+#main
+
+counter = 0
+while counter < 5:
+    reuseme()
+    counter+=1
+
+
+
+
+

week 5/receive_and_return.py

@@ -0,0 +1,27 @@
+# Receive and Return
+# Demonstrates parameters and return values
+
+def display(message):
+    print message
+
+def give_me_five():
+    five = 5
+    return five
+
+def ask_yes_no(question):
+    """Ask a yes or no question."""
+    response = None
+    while response not in ("y", "n"):
+        response = raw_input(question).lower()
+    return response
+
+# main
+display("Here's a message for you.\n")
+
+number = give_me_five()
+print "Here's what I got from give_me_five():", number
+
+answer = ask_yes_no("\nPlease enter 'y' or 'n': ")
+print "Thanks for entering:", answer
+
+raw_input("\n\nPress the enter key to exit.")