Build Inventory - codepath/compsci_guides GitHub Wiki

Unit 2 Session 1 (Click for link to problem statements)

U-nderstand

Understand what the interviewer is asking for by using test cases and questions about the problem.

• What if product_names and product_prices are both empty?
  • In this case, return an empty dict.

P-lan

Plan the solution with appropriate visualizations and pseudocode.

General Idea: Create a new dictionary using two provided lists for the keys and values

1) Create an empty inventory dict
2) For each index in the input lists
  a) Get the name and price at current index
  b) Map name -> price in the inventory dict
3) Return the inventory dict

⚠️ Common Mistakes

• If you loop through elements in one list, it becomes tricky to find the matching element in the other list. How can you loop through indices instead?

I-mplement

def build_inventory(product_names, product_prices):
    inventory = {}
    for i in range(len(product_names)):
        name = product_names[i]
        price = product_prices[i]
        inventory[name] = price
    return inventory