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October 20, 2017 23:14
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prices = { 'milk': 3.67, 'bread': 1.67, 'cheese': 4.67 } | |
print(prices) | |
print(prices['milk']) | |
# προσθήκη ζεύγους κλειδιού τιμής | |
prices['butter'] = 1.95 | |
# διαγραφή στοιχείου | |
del prices['butter'] | |
for food in prices: | |
print('{} costs {}'.format(food, prices[food])) | |
# bread costs 1.67 | |
# cheese costs 4.67 | |
# milk costs 3.67 | |
for k, v in prices.items(): | |
print(k, v) | |
# bread 1.67 | |
# cheese 4.67 | |
# milk 3.67 | |
len(prices) # 3 | |
prices.keys() | |
list(prices.keys()) # ['bread', 'cheese', 'milk'] | |
prices.values() | |
list(prices.values()) # [1.67, 4.67, 3.67] | |
'milk' in prices # True | |
'beer' in prices # False | |
if 'milk' in prices: | |
print('milk costs', prices['milk']) | |
# sets | |
basket = {'apple', 'orange', 'apple', 'orange', 'banana'} | |
print(basket) | |
# {'banana', 'orange', 'apple'} | |
'orange' in basket # True | |
'pear' in basket # False | |
for fruit in basket: | |
print(fruit, end=' ') |
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