Collections.OrderedDict() - Hacker Rank Solution

collections.OrderedDict

An OrderedDict is a dictionary that remembers the order of the keys that were inserted first. If a new entry overwrites an existing entry, the original insertion position is left unchanged.

Example

Code

>>> from collections import OrderedDict
>>> 
>>> ordinary_dictionary = {}
>>> ordinary_dictionary['a'] = 1
>>> ordinary_dictionary['b'] = 2
>>> ordinary_dictionary['c'] = 3
>>> ordinary_dictionary['d'] = 4
>>> ordinary_dictionary['e'] = 5
>>> 
>>> print ordinary_dictionary
{'a': 1, 'c': 3, 'b': 2, 'e': 5, 'd': 4}
>>> 
>>> ordered_dictionary = OrderedDict()
>>> ordered_dictionary['a'] = 1
>>> ordered_dictionary['b'] = 2
>>> ordered_dictionary['c'] = 3
>>> ordered_dictionary['d'] = 4
>>> ordered_dictionary['e'] = 5
>>> 
>>> print ordered_dictionary
OrderedDict([('a', 1), ('b', 2), ('c', 3), ('d', 4), ('e', 5)])

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Task

You are the manager of a supermarket.
You have a list of items together with their prices that consumers bought on a particular day.
Your task is to print each item_name and net_price in order of its first occurrence.

item_name = Name of the item.
net_price = Quantity of the item sold multiplied by the price of each item.

Input Format

The first line contains the number of items,.
The next lines contain the item's name and price, separated by a space.

Constraints

Output Format

Print the item_name and net_price in order of its first occurrence.

Sample Input

9
BANANA FRIES 12
POTATO CHIPS 30
APPLE JUICE 10
CANDY 5
APPLE JUICE 10
CANDY 5
CANDY 5
CANDY 5
POTATO CHIPS 30

Sample Output

BANANA FRIES 12
POTATO CHIPS 60
APPLE JUICE 20
CANDY 20

Explanation

BANANA FRIES: Quantity bought: , Price: 
Net Price: 
POTATO CHIPS: Quantity bought: , Price: 
Net Price: 
APPLE JUICE: Quantity bought: , Price: 
Net Price: 
CANDY: Quantity bought: , Price: 
Net Price: 

Collections.OrderedDict() - Hacker Rank Solution

from collections import OrderedDict
my_order = OrderedDict()
for i in range(int(raw_input())):
    name,space,price = raw_input().rpartition(' ')
    if name not in my_order:
        my_order[name] = int(price)
    else:
        my_order[name] += int(price)
for item_name, net_price in my_order.items():
    print item_name,net_price