Set
A set is a collection which is unordred and unindexed in a way that we cannot be sure in which order the items will appear. |
Set Example
RYB_color = {"Red","Yellow","Blue"}
print(RYB_color)
>>> {'Red','Yellow','Blue'}
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The set() Constructor
RYB_color = set(("Red","Yellow","Blue"))
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Access Items
Example 1
for x in RYB_color:
print(x)
>>> Red
>>> Yellow
>>> Blue
Example 2
print("Yellow" in RYB_color)
>>> True |
Change Items
Since a set is not orderer neither indexed, then we cannot acces to any item to change its value. |
Add Items
RYB_color.add("White")
print(RYB_color)
>>> "Red","White","Yellow","Blue"
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Get the Length of a Set
print(len(RYB_color))
>>> 3
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Remove Item
RYB_color.remove("Yellow")
print(RYB_color)
>>> {'Red','Blue'}
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If the item doesn't exist then remove() will raise an error. |
RYB_color.discard("Yellow")
print(RYB_color)
>>> {'Red','Blue'}
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If the item doesn't exist then discard() will raise an error. |
c = thisset.pop()
print(c)
print(thisset)
>>> Yellow {{nl}] >>> {'Red','Blue'}
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Since a set is not orderer neither indexed, then we cannot change acces to any item to change its value. |
RYB_color.clear()
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clear() returns an empty set.
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Join Two Sets
Second_color = {"Green","Orange","Purple"}
Color = RYB_color.union(Second_color)
print(Color)
>>> {'Yellow','Orange','Red','Green','Blue','Purple'}
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union() joins two sets into a new one and excludes any duplicate items.
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RYB_color.update(Second_color)
print(RYB_color)
>>> {'Yellow','Orange','Red','Green','Blue','Purple'}
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update() inserts the items in Second_color into RYB_color and excludes any duplicate items.
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