Recap - Email Validator

Part of the Logic & Flow section of Coddy's Python journey. Lesson 74 of 78.

Challenge

Medium

Create a function named clean_email_list that takes a list of email addresses and returns a list of valid, standardized email addresses.

Requirements:

- Convert all emails to lowercase and strip all whitespace at the beginning or end

- Only keep emails that:

- Contain exactly one '@' symbol

- Have at least one character before the '@'

- Have at least one character after the ‘@’

Use map() and filter() to solve the problem. Do not use for or while loops, comprehensions or generator expressions anywhere in your code, including inside helper functions.

Try it yourself

def clean_email_list(emails):
    # Write your code below
    
    
    
    
    valid_emails = 
    return list(valid_emails)

All lessons in Logic & Flow

1Variables Exploration

Constants Multiple Variable Assignments Swapping Variables Placeholder Variables Round Numbers List Casting

4Contact Book Application

Display Menu Add Contact

7Sets Part 2

Mathematical Operations Part 1 Mathematical Operations Part 2 Recap - Treasure Hunt Subsets and Supersets Iterating Over Sets Recap - Tournament Tracker

10Basic List Comprehensions

The Syntax Creating Simple Lists Adding Conditions Using Data Aggregation Recap - House Of Lists Recap - Elements Of Freedom

13Inventory Management System

Project Overview Add Item

Update Stock

Check Availability

Generate Report

2Dictionaries Part 1

What is a Dictionary?Creating a Dictionary Accessing Values Modifying Dictionaries Recap - Recipe Manager

5Advanced Decision Making

Ternary Operator Membership Checks Identity Checks Indentation Errors Recap - Vacation Filter

8Student Records Manager

Project Overview Add Student

11Advanced Functions

Returning Multiple Values Lambda Functions Part 1 Lambda Functions Part 2 Recap Challenge - Lambda Sort Recursive Functions Part 1 Recursive Functions Part 2 Recap - Sum Nested List

14Higher-Order Functions

The Map Function The Filter FunctionRecap - Email ValidatorRecap - Number Processor

3Dictionaries Part 2

Dictionary Methods Nested Dictionaries Checking for Keys Looping Through Dictionaries Recap - Frequency Counter

6Sets Part 1

What is a Set?Basic Operations Set Methods Recap - Remove Duplicates

9Advanced Data Aggregation

Using Sum Finding Minimum and Maximum Sorting Data Efficiently Recap - Dictionary Sorter

12Basic Error Handling

What is Error Handling?The Try and Except Block Handling Multiple Exceptions Recap - Shopping Cart Errors

15Final Challenges

Smart Contact Manager Word Analytics Data Transformer

Practice on your own: Online Python compiler