<gh_stars>1-10
import pandas as pd

lego = pd.read_csv('data/lego-sets.csv')

# Convert the name column in the lego dataset to lowercase and
# overwrite the dataframe by saving it as an object named lego 

# ____ = ____
# ____

# Filter the dataset to find all the lego sets that contain "weetabix"  in the name column
# Save this as a object named lego_weetabix

# ____ = ____
# ____

# Replace the word "weetabix" in the name column of the lego_wetabix dataframe
# with the string "cereal-brand"
# Save this in an object called lego_cereal

# ____ = ____
# ____

# If the row contains the word "promotional" in the name column,
# change the entire value to "cereal-brand freebie"

# ____ = ____

# Display lego_cereal

# ____