Section 12.13 Write Code Questions

Modify the ### to find sequences with one uppercase letter followed by an underscore followed by one or more lowercase letters.

Complete the code below to check if a string begins with a word character. If it does, return “Found a match!”, if not return “Not matched!” Replace the ### with your code.

Define the function match_four that takes a string and uses regex to return True if the string starts with 4 followed by zero to many other digits and False if it does not.

Define the function match_cat that uses regex to return True if a string matches cat, Cat, CAT, cAt, etc and False if it does not.

Define the function match_z to match a word containing a lowercase letter z. Return "Found a match!" if z is in the string and "Not matched!" if there is not a z.

Define the function matchMiddle_z to match a word containing the letter z, but not at the beginning or end of a word. Return “Found a match!” if z is in the string and “Not matched!” if there is not a z.

Finish the code below to find all of the emails in “mbox-short.txt” and add them to a list email_list and then print the list. An email starts with an alphanumeric character followed by one or more non white space characters and then “@” followed by one or more non white space characters with one alphabetic character at the end.

Using “mbox-short.txt”, extract the email domains from each email address using regex and add them to the list domains. For the email [email protected], this would locate the string “umich.edu”.

Using “mbox-short.txt”, extract the number next to each email (the amount of emails each person has sent) using a regex equation, and calculate the total amount of emails sent in the variable total_emails. Use () to capture and return the number.

Using “mbox-short.txt”, extract the usernames from each email address using regex and add them to the list usernames. For the email [email protected], this would locate the string “noname”.