Warehouse

Let's write a function to model a simple warehouse accounting system, which maintains the inventory for a set of commodities. We will represent the commodities by strings, e.g. 'anvils', 'bricks', and 'cinder blocks'.

There will be transactions on the warehouse which either increase or decrease the amount of a commodity.

• ('receive', 'anvils', 10) represents a transaction that increases the amount of 'anvils' by 10
• ('ship', 'anvils', 5) represents a transaction that decreases the amount of 'anvils' by 5

We will keep track of the inventory with a dictionary, where keys are the commodity names and values are the current amounts. For example, if the warehouse has 10 units of 'anvils', 20 'bricks', and 400 'cinder blocks', we have {'anvils': 10, 'bricks': 20, 'cinder blocks': 400}.

Write a function warehouse_process that takes two arguments:

• a dictionary representing the warehouse inventory
• a Python list of transactions, each of one of the two forms above

Your function should return None, but it should mutate the inventory dictionary to reflect all of the transactions. (We'll revisit functions like this in next week's readings.)

Make sure to handle the case for a receive transaction when the commodity is not yet present in the dictionary; simply treat the current total for that commodity as zero. Assume that there will always be enough supply to fill all the ship transactions.

It may be useful to review Relevant Readings aboout how to define custom functions.

def warehouse_process(inventory, transactions): ''' Updates inventory dictionary based on transaction history Parameters: inventory (dict) warehouse inventory. eg {'anvils': 10, 'bricks': 20} transactions (list) amounts of materials coming/going eg [('receive', 'anvils', 10), ('ship', 'anvils', 5)] ''' pass #Your code here

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