Electronic mail

Save all functions into the same file named emails.py.

1. Write the function address1() that takes a first name and a last name (strings), and returns an e-mail address following the pattern: first.last@student.upc.edu. Examples:

   >>> address1('joan', 'vendrell')
   'joan.vendrell@student.upc.edu'
   >>> address1('joan', 'Vendrell')
   'joan.Vendrell@student.upc.edu'
   >>> address1('Angela', 'Merkel')
   'Angela.Merkel@student.upc.edu'
   
   

   Note

   More tests are provided in the test-emails1.txt file.

2. Write the function address2() that takes a first name and a last name (strings), and returns an e-mail address following the pattern seen in the previous exercice but with a maximum of 10 characters allowed for the first name and a maximum of 15 characters for the last name (in both cases the first characters will be selected). Examples:

   >>> address2('joan', 'vendrell')
   'joan.vendrell@student.upc.edu'
   >>> address2('Joan', 'Vives_de_la_Cortada')
   'Joan.Vives_de_la_Cor@student.upc.edu'
   >>> address2('Francesc_Xavier', 'Vives_de_la_Cortada')
   'Francesc_X.Vives_de_la_Cor@student.upc.edu'
   
   

   Note

   More tests are provided in the test-emails2.txt file.

3. Write the function valid_address() that takes an e-mail address (string), and returns True if it is a valid address and False otherwise. A string represents a valid address if it contains one and only one ‘@’ symbol and there are at least 2 characters on the left of the ‘@’ symbol. Examples:

   >>> valid_address("pepet@lsi.upc.edu")
   True
   >>> valid_address("pepet.lsi.upc.edu")
   False
   >>> valid_address("@pepet.upc.edu")
   False
   >>> valid_address("t@pepet.upc.edu")
   False
   >>> valid_address("pe@pepet.upc.edu")
   True
   >>> valid_address("pepa@pepet@upc.edu")
   False
   

   Note

   More tests are provided in the test-emails3.txt file.

4. Write the function generate_password() that takes a first name, a last name and a dni (3 strings), and returns a password with the first three characters of the first name, then the first three characters of the last name and the two last digits of the dni. Examples:

   >>> generate_password("Salvador", "Espriu", "99123457N")
   'SalEsp57'
   >>> generate_password("Ramon", "Llull", "99654321J")
   'RamLlu21'
   

   Note

   More tests are provided in the test-emails4.txt file.

Solutions

A solution of these functions is provided in the emails.py file.