Cell 1

The TRAIN_DIR and TEST_DIR variables define the paths to the directories containing training and test images, respectively.

What the code could have been:

# Import required modules
import os

# Define constant for training dataset directory
TRAIN_DIR = 'images/train'
# Define constant for testing dataset directory
TEST_DIR = 'images/test'

# Check if directories exist
def check_directory(path: str) -> bool:
    """
    Check if a directory exists.
    
    Args:
        path (str): The path to the directory.
    
    Returns:
        bool: True if the directory exists, False otherwise.
    """
    return os.path.exists(path)

# Validate directories
if not os.path.exists(TRAIN_DIR):
    raise FileNotFoundError(f"Training directory '{TRAIN_DIR}' not found.")
if not os.path.exists(TEST_DIR):
    raise FileNotFoundError(f"Testing directory '{TEST_DIR}' not found.")

# TODO: Implement directory path normalization
"""
Consider implementing a function to normalize the directory paths, e.g., removing trailing slashes.
"""