[USER (data scientist)]: Sweet! Lastly, can you help me reset the index and give the columns better names? Please generate a DataFrame and a pickle file to summarize the average nutritional values by restaurant and food category from the 'fastfood.csv' dataset.
 My template of code snippet is:

---BEGIN CODE TEMPLATE--- 

import pandas as pd
import pickle

# Read the fastfood data 
fastfood = pd.read_csv("fastfood.csv")  

# YOUR SOLUTION BEGIN:
<code1>
[GENERATE YOUR CODE]
</code1>
# YOUR SOLUTION END: 

print(average_nutritional_values)
pickle.dump(average_nutritional_values,open("./pred_result/average_nutritional_values.pkl","wb"))

---END CODE TEMPLATE---

[YOU (AI assistant)]: Sure thing! You can use the reset_index() function to reset the index and then rename the columns like this: 

