การสุ่มตัวอย่างแบบแบ่งชั้น

# Create a DataFrame with all columns except category_desc
X = volunteer.____(____, axis=____)

# Create a category_desc labels dataset
y = ____[[____]]

# Use stratified sampling to split up the dataset according to the y dataset
X_train, X_test, y_train, y_test = ____(____, ____, ____, random_state=42)

# Print the category_desc counts from y_train
print(____[____].____)