1D and 2D list wrangling

""" 1. Read values from a 1D list, output to console: """

# Sample 1D list
my_list = [1, 2, 3, 4, 5]

# Output values from the list to the console
for value in my_list:
    print(value)


""" 2. Read values from the console, write to a 1D list: """

# Initialize an empty list
my_list = []

# Prompt the user for input and add values to the list
while True:
    user_input = input("Enter a value (or 'exit' to quit): ")
    if user_input.lower() == 'exit':
        break
    my_list.append(user_input)

# Display the contents of the list
print("Contents of the list:")
for value in my_list:
    print(value)


""" 3. Read values from a 1D list, write to a text file: """

# Sample 1D list
my_list = [1, 2, 3, 4, 5]

# Specify the name of the output text file
output_file_name = "output.txt"

# Open the text file for writing
with open(output_file_name, "w") as file:
    for value in my_list:
        file.write(str(value) + "\n")


""" 4. Read values from the console, write to a text file: """

# Specify the name of the output text file
output_file_name = "output.txt"

# Open the text file for writing
with open(output_file_name, "w") as file:
    while True:
        user_input = input("Enter a value (or 'exit' to quit): ")
        if user_input.lower() == 'exit':
            break
        file.write(user_input + "\n")


""" 5. Read values from a text file (each value on a separate line), write to a 1D list: """

# Specify the name of the input text file
input_file_name = "input.txt"

# Initialize an empty list
my_list = []

# Open the text file for reading
with open(input_file_name, "r") as file:
    for line in file:
        # Remove leading/trailing whitespace and add to the list
        my_list.append(line.strip())

# Display the contents of the list
print("Contents of the list:")
for value in my_list:
    print(value)


""" 6. Read a paragraph from a text file (terminated by a single EOL character), write to a 1D list:"""

# Specify the name of the input text file
input_file_name = "input.txt"

# Initialize an empty list
my_list = []

# Open the text file for reading
with open(input_file_name, "r") as file:
    paragraph = file.read()

# Split the paragraph into lines and add to the list
my_list = paragraph.splitlines()

# Display the contents of the list
print("Contents of the list:")
for value in my_list:
    print(value)


""" 7. Read values from a 2D list, output to console: """

python
Copy code
# Sample 2D list
two_d_list = [
    [1, 2, 3],
    [4, 5, 6],
    [7, 8, 9]
]

# Output values from the 2D list to the console
for row in two_d_list:
    for value in row:
        print(value, end=" ")  # Print values on the same line
    print()  # Move to the next line after each row


""" 8. Read CSV data from the console, write to a 2D list: """

import csv

# Initialize an empty 2D list
two_d_list = []

# Prompt the user for CSV input
print("Enter CSV data (e.g., 1,2,3):")
while True:
    user_input = input("Enter data (or 'exit' to quit): ")
    if user_input.lower() == 'exit':
        break
    # Split the input into values and append to the 2D list
    row = user_input.split(',')
    two_d_list.append(row)

# Display the contents of the 2D list
print("Contents of the 2D list:")
for row in two_d_list:
    print(row)