Hi I have a dictionary where the values are made of multiple lists. Example:

overallorders={1: [['B1', '1'], ['B2', '2'], ['B3', '1']], 2: [['B3', '4'], ['B2', '4']]}

How do I retrieve/print only the 1st or 2nd item of each list? For example, I intend to print as per the dictionary above:

Order 1
B1 qty 1 price is $4 x 1 = $4
B2 qty 2 price is $2 x 2 = $4
B3 qty 1 price is $10 x 1 = $10

Order 2
B3 qty 4 price is $10 x 4 = $40
B2 qty 4 price is $2 x 4 = $8

Currently, my progress is as follows:

for key, value in overallorders.items():
                        print('order number ',key)
                        print(value)

The output of that is:

order number  1
[['B1', '1'], ['B2', '2'], ['B3', '1']]
order number  2
[['B3', '4'], ['B2', '4']]

As you can see from the progress, I can only manage to print a whole set of lists per key. Any advice on how to retrieve each value from each list from each key?

CodePudding user response：

You can do

for order, things in overallorders.items(): 
     print(f'Order {order}\n') 
     for thing, quantity in things: 
         print(f'{thing} qty {quantity} price is $? x {quantity} = $?')

I don't know where the price is supposed to come from so I inserted a '?' character.

CodePudding user response：

You can use items with f-string:

prices = {'B1': 4, 'B2': 2, 'B3': 10}
overallorders = {1: [['B1', '1'], ['B2', '2'], ['B3', '1']], 2: [['B3', '4'], ['B2', '4']]}

for order, items in overallorders.items():
    print(f"Order {order}")
    for item, quantity in items:
        price = prices[item]
        print(f"{item} qty {quantity} price is ${price} x {quantity} = ${price * int(quantity)}")

Output:

Order 1
B1 qty 1 price is $4 x 1 = $4
B2 qty 2 price is $2 x 2 = $4
B3 qty 1 price is $10 x 1 = $10
Order 2
B3 qty 4 price is $10 x 4 = $40
B2 qty 4 price is $2 x 4 = $8

CodePudding user response：

You need to loop through the dictionary to get the list from each order. Within that loop, you loop through the list.

overallorders={1: [['B1', '1'], ['B2', '2'], ['B3', '1']], 2: [['B3', '4'], ['B2', '4']]}

for key in overallorders:
    print("Order {}".format(key))
    for item in overallorders[key]:
        print("{} qty {}".format(item[0], item[1]))
    print() # print a spacer line between orders

Results:

Order 1
B1 qty 1
B2 qty 2
B3 qty 1
Order 2
B3 qty 4
B2 qty 4

CodePudding user response：

I don't know where is the source of prices, But you can do this:

for k , v in overallorders.items():
    print("\norder{}".format(k))
    i = 0
    for value in v:
        print("{} qty {} price is $4 x 1 = $4".format(v[i][0] , v[i][1]))
        i  = 1

This code gives me:

order1
B1 qty 1 price is $4 x 1 = $4
B2 qty 2 price is $4 x 1 = $4
B3 qty 1 price is $4 x 1 = $4

order2
B3 qty 4 price is $4 x 1 = $4
B2 qty 4 price is $4 x 1 = $4