kev065 / python-p3-email-parser-lab

Email Parser Lab

Learning Goals

• Validate that strings match specific patterns using regular expressions.
• Search for strings that match specific patterns using regular expressions.

---

Key Vocab

• Class: a bundle of data and functionality. Can be copied and modified to accomplish a wide variety of programming tasks.
• Object: the more common name for an instance. The two can usually be used interchangeably.
• Object-Oriented Programming: programming that is oriented around data (made mobile and changeable in objects) rather than functionality. Python is an object-oriented programming language.
• Function: a series of steps that create, transform, and move data.
• Method: a function that is defined inside of a class.

---

Instructions

This is a test-driven lab. Run pipenv install to create your virtual environment and pipenv shell to enter the virtual environment. Then run pytest -x to run your tests. Use these instructions and pytest's error messages to complete your work in the lib/ folder.

You will write a program that, given a string of email addresses, parses that string into an array.

Your class, EmailAddressParser, should take the string of addresses on initialization. Instances should respond to a parse() instance method that parses the string into individual email addresses and returns them in an array.

Your class should be able to do this:

email_addresses = "[email protected], [email protected]"
parser = EmailAddressParser(email_addresses)

parser.parse()
# => ["[email protected]", "[email protected]"]

Note: Your EmailAddressParser class should handle a list of email addresses that are separated by either spaces or comma-separated values (CSVs):

EmailAddressParser("[email protected], [email protected]").parse
# => ["[email protected]", "[email protected]"]

EmailAddressParser("[email protected] [email protected]").parse
# => ["[email protected]", "[email protected]"]

Additionally, the parse() method should only return unique addresses, sorted alphabetically.

Write your solution in lib/email_address_parser.py.

Once all of your tests are passing, commit and push your work using git to submit.

Hints: in order to get this lab passing, you will need to do some research into the following topics:

• re - Regular expression operations - Python
• Python Regex Split String Using re.split()
• Think back to data structures: what could we cast a list to in order to get unique values?

---

Resources

• re - Regular expression operations - Python
• Python Regex Split String Using re.split()