Up to session3 homework

Students/Tyler G/session2/Ack.py

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+import sys
+
+def Ack(m, n):
+    """
+    This is the Ackerman function
+    which is recursive and I don't understand
+    all that well. It returns a non-negative integer.
+    """
+    if m < 0 or n < 0:
+        return None
+    if m == 0:
+        return n + 1
+    elif m > 0 and n == 0:
+        return Ack(m-1,1)
+    elif m > 0 and n > 0:
+        return Ack(m-1,Ack(m,n-1))
+
+def main():
+    m_entry = int((sys.argv[1]))
+    n_entry = int((sys.argv[2]))
+
+    print Ack(m_entry, n_entry)  
+
+if __name__ == "__main__":
+    main()
+

Students/Tyler G/session2/Session2_ExtraCredit.py

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+
+
+#Session 2 Extra Credit  
+def FizzBuzzFrodoBilboGandalf(n):
+    for i in range(1,n+1):
+        holder = " "
+        if i % 3 == 0:
+            holder += "Fizz"
+        if i % 5 == 0:
+            holder += "Buzz"
+        if i % 7 == 0:
+            holder += "Frodo"
+        if i % 11 == 0:
+            holder += "Bilbo"
+        if i % 13 == 0:
+            holder += "Gandalf"
+        if holder == " ":
+            print i
+        else:
+            print holder.lstrip(" ")
+
+
+FizzBuzzFrodoBilboGandalf(100)

Students/Tyler G/session2/series.py

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+def fibonacci(n):
+    """
+    Returns the nth value of the fibonacci sequence.
+    """
+    sequence = [0,1]
+    for i in range(n-2):
+        sequence.append(sequence[len(sequence)-2] + sequence[len(sequence)-1])
+    return sequence[n-1]
+
+def lucas(n):
+    """
+    Returns the nth value of the lucas sequence. It is
+    the same as the fibonacci series except the starting 
+    numbers are 2 and 1 instead of 0 and 1.
+    """
+    sequence = [2,1]
+    for i in range(n-2):
+        sequence.append(sequence[len(sequence)-2] + sequence[len(sequence)-1])
+    return sequence[n-1]
+
+def sum_series(n, o = 0, p = 1):
+    """
+    First parameter returns nth value of series. The second 
+    and third optional parameters allows the user to define 
+    the first two values in the fibonacci sequence.
+    """
+    sequence = [o, p]
+    for i in range(n-2):
+        sequence.append(sequence[len(sequence)-2] + sequence[len(sequence)-1])
+    return sequence[n-1]
+
+def main():
+    n_entry = int((sys.argv[1]))
+    o_entry = int((sys.argv[2]))
+    p_entry = int((sys.argv[3]))
+
+    print sum_series(n_entry, o_entry, p_entry)  
+
+if __name__ == "__main__":
+    main()

Students/Tyler G/session3/list_lab.py

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+fruits = ["Apples", "Pears", "Oranges", "Peaches"]
+
+for fruit in fruits:
+    print fruit
+
+new_fruit = raw_input("What kind of fruit would you like you to add to the list? ")
+fruits.append(new_fruit)
+
+for fruit in fruits:
+    print fruit
+
+number = raw_input("Enter a whole number: ")
+try:
+    number = int(number)
+except ValueError:
+    print "Must be a whole number!"
+
+x = 0
+for i in range(number,number + len(fruits)):
+    print "%i is to %s." % (number, fruits[x])
+    number += 1
+    x += 1
+
+fruits.insert(0,"Bananas")
+
+print "Only fruits which start with 'p':"
+for fruit in fruits:
+    if fruit[0].lower() == "p":
+        print fruit
+
+print "Full list:"        
+for fruit in fruits:
+    print fruit
+
+fruits.pop(0)
+
+print "First element removed:"
+for fruit in fruits:
+    print fruit
+
+removed_fruit = str(raw_input("Type the name of the fruit you wish to remove from the list: "))
+
+list_size = len(fruits)
+for fruit in fruits:
+    if removed_fruit.lower() == fruit.lower():
+        fruits.remove(fruit)
+if list_size == len(fruits):
+    print "Could not find '%s' in the list of fruits!" % removed_fruit
+
+print "Full list:"        
+for fruit in fruits:
+    print fruit
+
+
+for fruit in fruits:
+    print "Do you like %s?" % fruit
+    removed_fruits = []
+    while True:
+        question = raw_input("Enter 'yes' or 'no': ")
+        if question.lower() == "no":
+            print "Removing %s.." % fruit
+            removed_fruits.append(fruit)
+            break
+        elif question.lower() == "yes":
+            print "Keeping %s.." % fruits
+            break
+        else:
+            print "You must enter 'yes' or 'no'!"
+for fruit in fruits:
+    if fruit in removed_fruits:
+        fruits.remove(fruit)    
+
+
+print "Here's the list of fruits again: "
+for fruit in fruits:
+    print fruit
+
+new_fruits = []
+
+for i in fruits:
+    new_fruits.append(i[::-1])
+
+print "Now here's the fruit list with each element reversed: "
+for i in new_fruits:
+    print i

Students/Tyler G/session3/mailroom.py

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+from textwrap import dedent
+import math
+
+# Original list of historical donors and their amounts donated
+donations = []
+donations.append( ("Marshawn Lynch", [238.99, 159.23]) )
+donations.append( ("Russell Wilson", [9910.00, 159.23, 357.00]) )
+donations.append( ("Richard Sherman", [426.48, 3859.94, 5496.00]) )
+donations.append( ("Kam Chancellor", [999.99]) )
+donations.append( ("Bobby Wagner", [999.99]) )
+
+def show_donations():
+    x = 0
+    print "\nThe names of previous donors are: "
+    for person in donations:
+        print donations[x][0]
+        x += 1
+
+def write_thank_you(name, amount):
+    print dedent('''
+        Dear %s,
+            Thank you for your very kind donation of $%d.
+            It will be put to very good use.
+                Sincerely,
+        -The Team
+        ''') % (name, amount)
+
+def check_add_donators(name):
+    x = 0
+    move_on = False
+    for person in donations:
+        if name.lower() == donations[x][0].lower():
+            print "\n%s is a previous donor!" % donations[x][0]
+            choice = None
+            while not choice:
+                amount = raw_input("Please add another donation entry for this individual. Be sure to enter an integer or float: ")
+                try:
+                    choice = float(amount)
+                except ValueError:
+                    print "Must be an integer or float value!"                
+            donations[x][1].append(float(amount))
+            write_thank_you(donations[x][0], float(amount))
+            move_on = True
+        x += 1
+    if move_on == False:
+        print "\n%s is a new donor! Adding the name to registry." % name
+        choice = None
+        while not choice:
+            amount = raw_input("How much $ did this individual donate? Be sure to enter an integer or float: ")
+            try:
+                choice = float(amount)
+            except ValueError:
+                print "Must be an integer or float value!"
+        donations.append( (name, [float(amount)]) )
+        write_thank_you(name, float(amount))
+
+def sort_key(item):
+	    return item[1]        
+
+def create_report():
+    report = []
+    for (name, amount) in donations:
+        total = sum(amount)
+        count = len(amount)
+        avg = total / count
+        report.append( (name, total, count, avg) )
+    report.sort(key=sort_key)
+    print "%25s | %11s | %9s | %12s" % ("Name", "Total Donated", "Freq Donated", "Avg Donated")
+    print "-"*66
+    x = 0
+    for row in report:
+        print "%25s %11.2f %12i %17.2f" % row
+
+print "\n"
+print "*"*10, "Welcome to the Mailroom command-line script", "*"*10 
+while True:
+    print dedent('''
+    Type "list" to show the names of our donors. Type "Thank You" to generate 
+    a thank-you letter to a donor. Type "Create Report" to generate a report
+    of our donors which includes their number of donations, average donation, 
+    and total donation amounts. Finally, type "Exit" to exit the program.''')
+    response = raw_input("\nWhich option you like to select?: ")
+    if response.lower() == "list":
+       show_donations()
+    if response.lower() == "thank you":
+        name_query = raw_input("Enter the full name of the donor: ")
+        check_add_donators(name_query)
+    if response.lower() == "create report":
+        create_report()
+    if response.lower() == "exit":
+        print "Exiting now..."
+        break
+

Students/Tyler G/session3/rot13.py

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+# Returns a dictionary of the alphabet encrypted. The shift value is 13 by default.
+def code_shift(shift = None):
+    if shift == None:
+        shift = 13
+    letters = "abcdefghijklmnopqrstuvwxyz"
+    coder = {}
+    x = 0
+    for i in range(len(letters)):
+        if i < (len(letters)-shift):
+            coder[letters[i]] = letters[i + shift]
+        else:
+            coder[letters[i]] = letters[x]
+            x += 1
+    return coder
+
+def rot13(n):
+    encrypted = code_shift()
+    holder = " "
+    for char in n:
+        if char.lower() in encrypted:
+            if char == char.lower():
+                holder += encrypted[char.lower()]
+            else:
+                holder += encrypted[char.lower()].upper()
+        else:
+            holder += char
+    return holder.lstrip(" ")
+
+
+

Students/Tyler G/session3/string_lab.py

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+# Slicing lab
+def switch(n):
+    return n[-1:] + n[1:-1] + n[:1]
+
+def every_other[n]
+    return n[::2]
+
+def big_string(n):
+    return every_other(n[4:-4]) 
+
+def big_strip2(n):
+    return n[4:-4:2]
+
+def reverse_sequence(n):
+    return n[::-1]
+
+def third_chop(n):
+    thirds = len(n) / 3
+    first_third = n[:thirds]
+    middle_third = n[thirds:2*thirds]
+    last_third = n[2*thirds:]
+    return middle_third + last_third + first_third
+
+
+
+# Session 3 Extra Credit
+def FizzBuzzAll(n, dictionary = None):
+    if dictionary == None:
+        dictionary = {3: "Fizz", 5: "Buzz", 7: "Frodo", 11: "Bilbo", 13: "Gandalf"}
+    assert type(n) == int and type(dictionary) == dict, "You must insert an integer and an optional dictionary."
+    for num in range(1, n + 1):
+        holder = " "
+        for value in dictionary:
+            if num % value == 0:
+                holder += dictionary[value]
+        if holder != " ":
+            print holder.lstrip(" ")
+        else:
+            print num
+