List/string manipulation exercises#

Exercise 1#

For the first exercise, you’ll be reading in some names and manipulating them.

First, let’s grab your full names from the course roster.

import pandas as pd
names = pd.read_csv('https://raw.githubusercontent.com/psych750/resources/main/stimuli/psych750_roster.csv')
full_names = list(names['Name'])
print(full_names)

['Carter,Atlas', 'Chen,Fuyi', 'Cherry,Zachary', 'Crosby,Amanda', 'Donnelly,Andi', 'Goeden,Allyson', 'Herrmann,Madison', 'Hoffman,Caleb', 'Jiang,Shuheng', 'Li,Zihan', 'Liu,Yanchi', 'Phipps,Destiny Victoria', 'Ping,Fangge', 'Simental,Anel', 'Smith-Becker,Liam', 'Spangler,Zachary', 'Teo,Krystle', 'Vila,Evan Andrew', 'Wang,Yihan', 'Yang,Shiyu', 'Zhang,Kelly', 'Zhu,Tianrun']

We now have a list where each element corresponds to a string containing a student’s full name (as it’s recorded in the class roster)

Output last names only#

Write a loop with code that processes the full_names list and outputs just the last name

Output first names only#

Now write a loop with code that processes the full_names list and outputs just the first name (a bit more tricky because some students have middle names)

Now turn it into a function#

Complete the body of this function to return a list containing just the first names in the same order as the full names that were given to the function.

def return_first_names(names):
    pass

Now test it by running this code:#

The code below will print a ‘Woops….’ initially because return_first_names() is just a placeholder. Once you fill it in correctly, it will print ‘nice!’

first_names = return_first_names(full_names)
try:
    assert first_names == ['Atlas','Fuyi','Zachary','Amanda','Andi','Allyson','Madison','Caleb','Shuheng','Zihan','Yanchi','Destiny','Fangge','Anel','Liam','Zachary','Krystle','Evan','Yihan','Shiyu','Kelly','Tianrun']
    print('nice!')
except AssertionError:
    print("Woops something's not right with your list")

Woops something's not right with your list

Exercise 2#

In this more extended exercise, you’ll be writing some code to count up vowels in lists of words

vowels = ['a','e','i','o','u']
words = ['', 'rhythms', 'abracadabra', '12324', 'trysts','a','zebra', 'refrigerator']

  1. Figure out which word in words has the most vowels. Your code should print out the element of the words list that contains the most vowels.

  2. If you didn’t use a function for part 1, define a function count_vowels_in_string() that takes in a string and outputs the number of vowels it has. Then use this function to compute which word has the most vowels.

  3. Update your code so that it now outputs the word containing the most vowels and the number of vowels it contains.

  4. Make sure your code can deal with a list that contains integers, not just strings. For example, words might contain the element 45

Challenge

Does your code allow you to easily change the function from computing the maximum number to computing the minimum number? If not, think of an alternate solution that will let you do this.