Names and Phone Numbers [using a Python dictionary]

14 points 

Introduction

This project stores the names and phone numbers of every family in a town. It then provides various methods that allow the user to access this information. (A webpage said that there are 5203 households in Metuchen, so there are 5203 name - phone number pairs in this project.) The 2010 census data includes a spreadsheet that lists the most common last names in the U.S. I used the 5203 most common last names in the U.S. for this project. The phone numbers are fake; I made them up.

Here is a summary of the methods in the project:

• readIn(): reads the input file into a Python dictionary. Names are the keys, and phone numbers are the values.
• isSpamCall(): prints out whether or not a phone call from a given number is from a town resident
• isResident(): prints out whether or not any town resident has a given last name
• lookUpNumber(): given a phone number, prints out the name of the resident with that number (and prints the phone number)
• addResident(): given a name and number, checks whether the phone number is a duplicate and whether the name is already present in the dictionary. If the name and number are both new, the resident is added to the dictionary.
• lookUpName(): given a name, prints out the name and phone number of the resident with that name
• lookUpName() [extra credit]: finds not only the last name SMITH, for example, but also all other SMITHs in town -- SMITH1, SMITH 2, etc.

Some info on a Python dictionary:

A dictionary links or maps a 'key' to a 'value'. For example, if the dictionary records a person's favorite color, you could have:

colors = {} #declares a dictionary
colors['Bill'] = 'blue' #Here, 'Bill' is the key and 'blue' is the value.
colors['Jean'] = 'purple'
colors['Carlos'] = 'red'

# Run the following code to see what prints, and what that tells you about how dictionaries work:
print(colors)

print('Jean in the dictionary:','Jean' in colors)

keys = colors.keys()
print('keys',keys)

values = colors.values()
print('values',values)

items = colors.items()
print('items',items)

for color in colors:
   print('key:',color)

Videos

The video below shows the method isSpamCall() being run. The video includes audio.

The video below shows the method isResident() being run. The video includes audio.

The video below shows the method lookUpName() being run. The video includes audio.

The video below shows the method lookUpNumber() being run. The video includes audio.

The video below shows the method addResident() being run. The video includes audio.

The video below shows the extra-credit version of the method lookUpName() being run. The video includes audio.

Starting Point

Download NamesAndNumbers.py as a starting point for the project. The file guides you towards completing the program. Also download lastNames.txt, which is the project's input file.

Extra Credit

3 points

As mentioned above, you can write an extra-credit version of lookUpName(). Some suggestions for writing the extra-credit version of lookUpName() are given in NamesAndNumbers.py.