我所理解和假设的是你想把任何相关的分类，

# Create a mapping of old category names to new category names
mapping = {
    'Bathing': 'Cleaning',
    'Cooking': 'Cooking',
    'Cleaning': 'Cleaning',
    'Cooking and Drinking': 'Other',
    'Cooking, cleaning and drinking': 'Other',
    'Domestic use': 'Other',
}

# Use the `rename` method to rename the categories
df3 = df3.rename(columns=mapping)