Collections and Data Structures

# Initialize the list and day variable
day_array = ["Monday", "Tuesday", "Wednesday", "Thursday", "Friday"]
day = "Thursday"

# Get the array length and specific days
array_length = len(day_array)
array_first_day = day_array[0]  # Indexing in Python starts at 0
array_last_day = day_array[-1]  # Python's negative indexing for last element

# Print information about the array
print(f"Length of array: {array_length}")
print(f"First day of week: {array_first_day}")
print(f"Third day of week: {day_array[2]}")
print(f"Last day of week: {array_last_day}")

# Check if the day is in the array
print(f"{day} is in {day_array}: {day in day_array}")

# Add "Sunday" to the beginning and "Saturday" to the end
day_array.insert(0, "Sunday")
day_array.append("Saturday")

# Print each element in the array
print("Day of week:")
for day in day_array:
    print(f"  {day}")

# Join array elements with ";" and print
print(f"Day of the week: {';'.join(day_array)}")

# Sort the array and print again
day_array.sort()
print(f"Day of the week (sorted): {';'.join(day_array)}")

Length of array: 5
First day of week: Monday
Third day of week: Wednesday
Last day of week: Friday
Thursday is in ['Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday']: True
Day of week: 
  Sunday
  Monday
  Tuesday
  Wednesday
  Thursday
  Friday
  Saturday
Day of the week: Sunday;Monday;Tuesday;Wednesday;Thursday;Friday;Saturday
Day of the week (sorted): Friday;Monday;Saturday;Sunday;Thursday;Tuesday;Wednesday

color_set = {"red", "yellow", "blue"}
color_set2 = {"red", "orange", "yellow"}

print("Length of set:", len(color_set))

print("Color Set 1")
for color in color_set:
    print("  ", color)

print("Color Set 2:", "---".join(color_set2))

print("Intersection:", color_set.intersection(color_set2))
print("Union:", color_set.union(color_set2))
print("Difference:", color_set.difference(color_set2))
print("Difference:", color_set2.difference(color_set))

Length of set: 3
Color Set 1
  yellow
  blue
  red
Color Set 2: yellow---orange---red
Intersection: {'yellow', 'red'}
Union: {'yellow', 'orange', 'blue', 'red'}
Difference: {'blue'}
Difference: {'orange'}

day_dict = {}
day_length_dict = {}

day_dict["Mon"] = "Monday"
day_dict["Tue"] = "Tuesday"
day_dict["Wed"] = "Wednesday"
day_dict["Thu"] = "Thursday"
day_dict["Fri"] = "Friday"

if "Wed" in day_dict:
    print(day_dict["Wed"])

if "Sat" not in day_dict:
    print('no key "Sat"')

print("print key-value pairs")
for day in day_dict.keys():
    print(f"  {day} = {day_dict[day]}")

print("print values (sorted)")
for day_value in sorted(day_dict.values()):
    print(f"  {day_value}")

# get length of each value and keep track of lengths
for day_value in day_dict.values():
    day_length = len(day_value)
    day_length_dict[day_value] = day_length

print("print lengths")
for day in day_length_dict.keys():
    print(f"  {day} = {day_length_dict[day]}")

print("print lengths in descending order")
for length, day in sorted(zip(day_length_dict.values(), day_length_dict.keys()), reverse=True):
    print(f"  {day} = {length}")

print("print lengths in ascending order")
for length, day in sorted(zip(day_length_dict.values(), day_length_dict.keys()), reverse=False):
    print(f"  {day} = {length}")

Wednesday
no key "Sat"
print key-value pairs
  Mon = Monday
  Tue = Tuesday
  Wed = Wednesday
  Thu = Thursday
  Fri = Friday
print values (sorted)
  Friday
  Monday
  Thursday
  Tuesday
  Wednesday
print lengths
  Monday = 6
  Tuesday = 7
  Wednesday = 9
  Thursday = 8
  Friday = 6
print lengths in descending order
  Wednesday = 9
  Thursday = 8
  Tuesday = 7
  Monday = 6
  Friday = 6
print lengths in ascending order
  Friday = 6
  Monday = 6
  Tuesday = 7
  Thursday = 8
  Wednesday = 9