# Noemi Cabrera # 3 November 2021 # In this assesment, I practiced creating lists, accessing items in a list, adding items to # the end of a list, inserting items into a list, and deleting items from a list using the # different method I have learned in module 6. # I had difficulties with the challenge at the end a bit. I coudn't figure out how to repeatedly # move each otem in the list created without getting an error. Then, after many tries, using # a while loop worked for me.

# In this code, I created the days_of_week list and populated it with strings. # [ ] create and populate list called days_of_week then print it days_of_week = ["Monday","Tuesday","Wednesday","Thursday","Friday","Saturday","Sunday"] print(days_of_week)

# In this code, I used a for..in loop to print the items that are odd indexes only. For this, # I used string slicng with a step of 2 starting at index 1. # [ ] after days_of_week is run above, print the days in the list at odd indexes 1,3,5 for day in days_of_week[1::2]: print(day)

# [ The variable 'phone_letters' is assigned to a list of strings that contain the letters # for phone keys 0-9. The list is printed ] # create and populate list called phone_letters then print it phone_letters = [" ","","ABC","DEF","GHI","JKL","MNO","PQRS","TUV","WXYZ"] print(phone_letters)

# The variable "day" is assigned to the index 1 element located in the value assigned to the # days_of_week list. The item is printed # [ ] create a variable: day, assign day to "Tuesday" using days_of_week[] # [ ] print day variable day = days_of_week[1] print(day)

# The variable "day" is assigned to the index 5 element located in the value assigned to the # days_of_week list. The item is printed. # PART 2 # [ ] assign day to days_of_week index = 5 # [ ] print day day = days_of_week[5] print(day)

# In this code, the string "Restday" is added to the days_of_week list by using the .append() method. # [ ] Make up a new day! - append an 8th day of the week to days_of_week # [ ] print days_of_week days_of_week.append("Restday") print(days_of_week)

# In this code, the string "Tryday" is added to the days_of_week list between 'Wednesday' # and 'Thrusday' by using the .insert() method. You indicate the index where you want to place # the new item and then indicate the item, which in this case is 'Tryday'. # [ ] Make up another new day - insert a new day into the middle of days_of_week between Wed - Thurs # [ ] print days_of_week days_of_week.insert(3,"Tryday") print(days_of_week)

# In this code, the string "Icecreamday" is added to the days_of_week list between 'Friday' # and 'Saturday' by using the .insert() method. The string is placed at index 6. The new list is printed. # [ ] Extend the weekend - insert a day between Fri & Sat in the days_of_week list # [ ] print days_of_week days_of_week.insert(6,"Icecreamday") print(days_of_week)

# In this code, the last item (idex of -1) is removed from the days_of_week list and can be returned by using the # .pop() method. The new list is printed. # [ ] print days_of_week # [ ] modified week is too long - pop() the last index of days_of_week & print .pop() value # [ ] print days_of_week print(days_of_week) days_of_week.pop(-1) print(days_of_week)

# In this code, the item at index 4 is deleted from the the days_of_week list by using the # del method. The new list is printed. # [ ] print days_of_week # [ ] delete (del) the new day added to the middle of the week # [ ] print days_of_week print(days_of_week) del days_of_week[4] print(days_of_week)

# In this code, the first item (idex of 0 - default) is removed from the days_of_week list # and can be returned by using the .pop() method. The new list is printed. # [ ] print days_of_week # [ ] programmers choice - pop() any day in days_of week & print .pop() value # [ ] print days_of_week print(days_of_week) days_of_week.pop() print(days_of_week)

# In this code, the function let_to_num() is defined. It accepts 1 argument that can be # any letter, empty string, etc. Using a while loop, this function checks if the argument # is found in the phone_letters list. If it's found the dial key will be displayed. If it's # not found, then the key is added one every time and the string "Not found will display". # [ ] create let_to_num() def let_to_num(letter): key = 0 while key < 10: if letter in phone_letters[key]: return key else: key = key + 1 return "Not Found" answer = let_to_num("5") print("The key is:",answer)

# In this code, the string list is turn into a string. BY using a while loop,all the items # are removed and can also return by using the .pop() method.This is stored in the variable # rev, which is used to indicate the item after the index in the .insert method to put all # items in a new list. The new list, rev_string, is turned in to a string by using the # .join() method. The starting list and the reversed string is printed. # [ ] Challenge: write the code for "reverse a string" string = ["Happy", "Sad", "Excited", "Mad"] rev_str = [] print("List:", string) while string: rev = string.pop(0) rev_str.insert(0,rev) print("Reversed string:", ", ".join(rev_str))