การแปลงเป็น DataFrame

def select_keys(dictionary, keys_to_keep):
  new_dict = {}
  # Loop through kept keys and add them to new dictionary
  for k in ____:
    ____
  return new_dict

# Use the select_keys to reduce to the 4 required keys
filtered_bag = dict_bag.map(____, ____=____)

# Convert the restructured bag to a DataFrame
df = filtered_bag.____

# Print the first few rows of the DataFrame
print(____)