# Name:
# Kerberos:
# homework_3.py

##### Template for Homework 3, exercises 6.1 - 7.2 ######

# **********  Exercise 6.1 ********** 

# Bugs
##### BUG 1 #####


##### BUG 2 #####


##### BUG 3 #####



# **********  Exercise 6.2 ********** 

# Define "mutable" and list what data structures have this characteristic



# Define "immutable" and list what data structures have this characteristic




# **********  Exercise 6.3 **********

def ball_collide(ball1, ball2):
    '''
    Computes whether or not two balls are colliding
    
    ball1: a tuple of (x-coord, y-coord, radius) nums (ints and/or floats);
        represents first ball
    ball2: a tuple of (x-coord, y-coord, radius) nums (ints and/or floats); 
        represents second ball

    returns: True if the balls collide and False if they do not collide
    '''
    ##### YOUR CODE HERE #####

    

# Test Cases for Exercise 6.3
# print ball_collide((0, 0, 1), (3, 3, 1)) # Should be False
# print ball_collide((5, 5, 2), (2, 8, 3)) # Should be True
# print ball_collide((7, 8, 2), (4, 4, 3)) # Should be True


# **********  Exercise 7.1 **********

def add_class(class_num, desc, class_dict):
    '''
    Adds a class number/class name pair to a dictionary
    
    class_num: a string; the MIT number associated with the class
    desc: a string; the English name of the class
    class_dict: a dictionary with the keys being class numbers
     and the values being class names

    returns: nothing; only modifies class_dict
    '''
    ##### YOUR CODE HERE #####
    
    

def print_classes(course, class_dict):
    '''
    Prints out all the classes you've taken in a given Course.
     If no classes were taken in the Course, print out that none were taken
    
    course: a string; the Course for which we would like to
     print out classes taken
    class_dict: a dictionary with the keys being class numbers
     and the values being class names

    returns: nothing; simply prints out relevant information
    '''
    ##### YOUR CODE HERE #####

    

# Test Cases for Exercise 7.1
##### YOUR CODE HERE #####



# **********  Exercise 7.2 **********

def buildAddrBook(fileName):
    '''
    Builds an address book from a file.
    
    fileName: a string, the name of the file to read in

    returns: a dictionary with keys and values generated
    '''
    # create empty dictionary to use as our address book
    addrBook = {}
    # open file
    inputF = open(fileName)
    # loop through each line of the file
    for line in inputF:
        # split the line separated by commas
        splitted_line = line.split(',')
        # 0th and 1st index corresponds to LastName, FirstName
        name = splitted_line[0] + ', ' + splitted_line[1]
        # 2nd index is phone number
        phone = splitted_line[2]
        # all the rest are email addresses
        # do rstrip to remove possible newline character in the email
        email = [x.rstrip("\r\n") for x in splitted_line[3:]]
        # combine phone and email to be value of the key name
        addrBook[name] = [phone] + email

    # close the file when we're done!
    inputF.close()
    return addrBook

def changeEntry(addrBook, entry, field, newValue):
    '''
    Changes one entry in the specified address book.

    addrBook: a dictionary in the address book format
      returned by buildAddrBook.
    entry: a string; the pre-existing entry to change
    field: a string; the field to change (one of: "name",
      "phoneNumber", "emailAddress")
    newValue: the new value for the specified field

    returns: nothing; only modifies addrBook
    '''
    ## YOUR CODE HERE ##