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Grocery List Exercise (PyLadies Austin 07-24-17)
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# Write a program that creates a unique grocery list. | |
# There must be a function to add an item to the list | |
# There must be a function to get the list. | |
# This means you can look at the list at anytime | |
# and add an item at any time. | |
# If you want to add a challenge, also have the ability to | |
# specify the amount you need to purchase of each item | |
from collections import defaultdict | |
class GroceryList(): | |
def __init__(self): | |
self.items = defaultdict(int) | |
# self.items = {} # set grocery list empty | |
print("Grocery list has been created.") | |
def add_item(self, item, quantity): | |
self.items[item] += quantity | |
# if item not in self.items: | |
# self.items[item] = quantity | |
# else: | |
# self.items[item] += quantity | |
print("{} {} added to grocery list".format(quantity, item)) | |
return self.items | |
def get_list(self): | |
return self.items | |
def main(): | |
sonachi_grocery = GroceryList() # instantiate a GroceryList object | |
print("Sonachi's grocery list: {}".format(sonachi_grocery.get_list())) | |
print() | |
sonachi_grocery.add_item("Colgate", 2) # add item to the list | |
print("Sonachi's grocery list: {}".format(sonachi_grocery.get_list())) | |
print() | |
# adding a lot of items to the list using a for loop | |
items = [("shampoo", 1), ("shrimp", 1), ("noodles", 2), ("hand wash", 2)] | |
for item in items: | |
sonachi_grocery.add_item(item[0], item[1]) | |
print("Sonachi's grocery list: {}".format(sonachi_grocery.get_list())) | |
print() | |
# testing that the object increments items that are already present in the grocery list | |
sonachi_grocery.add_item("shrimp", 1) | |
print("Sonachi's grocery list: {}".format(sonachi_grocery.get_list())) | |
if __name__ == '__main__': | |
main() |
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