Python 入門（開發者向）
Jasmin Ludolf
Senior Data Science Content Developer
只含唯一資料
不可變
適合識別並移除重複
搜尋快（比清單等結構更快）
{}
:
# Create a set of ingredients ingredients = {"pasta", "tomatoes", "pasta", "basil", "garlic", "olive oil", "salt"} print(ingredients)
{'pasta', 'tomatoes', 'garlic', 'basil', 'olive oil', 'salt'}
# Existing list variable ingredients_list = ["pasta", "tomatoes", "garlic", "basil" "olive oil", "pasta", "salt"] # Convert to a set unique_ingredients = set(ingredients_list) # Check the data type type(unique_ingredients)
# Existing list variable ingredients_list = ["pasta", "tomatoes", "garlic", "basil" "olive oil", "pasta", "salt"]
# Convert to a set unique_ingredients = set(ingredients_list)
# Check the data type type(unique_ingredients)
set
print(unique_ingredients)
{'pasta', 'tomatoes', 'garlic', 'basil', 'olive oil'}
[]
# Trying to subset a set print(unique_ingredients[0])
TypeError: 'set' object is not subscriptable
ingredients = {"pasta", "tomatoes", "garlic", "basil", "olive oil", "salt"} # Sorting a set print(sorted(ingredients))
ingredients = {"pasta", "tomatoes", "garlic", "basil", "olive oil", "salt"}
# Sorting a set print(sorted(ingredients))
['basil', 'garlic', 'olive oil', 'pasta', 'salt', 'tomatoes']
sorted()
[0]
# Creating a tuple serving_sizes = (1, 2, 4, 6, 8) # Convert another data structure to a tuple ingredients_tuple = tuple(ingredients_list)
# Creating a tuple serving_sizes = (1, 2, 4, 6, 8)
# Convert another data structure to a tuple ingredients_tuple = tuple(ingredients_list)
# A tuple serving_sizes = (1, 2, 4, 6, 8) # Access the second element print(serving_size[1])
2
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