Exam 1 Practice

• Write an expression that takes the string "Thorny,Farva,Mac,Rabbit,Foster" and returns the list ["Thorny", "Farva", "Mac", "Rabbit", "Foster"].

• Write an expression that takes list ["Thorny", "Farva", "Mac", "Rabbit", "Foster"] and returns the string "Thorny and Farva and Mac and Rabbit and Foster".

• Write a single expression that takes the string "Thorny and Farva and Mac and Rabbit and Foster" and returns the string with the ands replaced by ets.

• Write a single expression that takes the list ["Thorny", "Farva", "Mac", "Rabbit", "Foster", "Farva"] and returns a data structure with no duplicate elements.

• Write a Python script named calc.py that takes three command line arguments, where the first command line argument is a number (first operand), the second is an arithmentic operator, and the third is a number (second operand). When run, your program should print the result of applying the operator to the operands. For example:

$ python calc.py 1 + 2
3

Your program should support at least the operators +, -, *, /.

• Write a single expression that takes a list of strings like ["Germany:Berlin", "France:Paris", "England:London"] and returns a dictionary like {'Germany': 'Berlin', 'France': 'Paris', 'England': 'London'}

• Assuming emails = ["abdallah@hotmail.com", "bob@aol.com", "chen@gmail.com", "dhruv@aol.com"] has been executed, replace the following snippet of code with a single line that uses a list comprehension, filling in CONDITION with an expression that evaluates to True if the email is an aol.com email address.

retro_chic = []
for e in emails:
    if CONDITION:
        retro_chic.append(e)