Not understanding dictionaries

[gr3yali3n]

Ok, I am reading a book automate the boring stuff, I am on the dictionaries chapter because I’m focusing on dictionaries right now maybe I should go back to for loops but,
I have a couple questions. Regarding the following code and what it is doing.
At the for loop for k,v in inventory.items() what is happening here?
At print(str(v) + ‘’ + k ) what is the ‘ ‘ empty string?
And I guess at item_total += v what is going on here as well?

stuff={
	'rope':1,'torch':6,'gold coins':45,'dagger':1,'arrow':12
}

def display_Inventory(Inventory):
	print('Inventory')
	Item_total=0
	for k,v in Inventory.items():
		print(str(v)+''+k)
		Item_total += v
		print('Total number of items:' + str(Item_total))
		
display_Inventory(stuff)