Python | Counter Objects | elements()
Counter class is a special type of object data-set provided with the collections module in Python3. Collections module provides the user with specialized container datatypes, thus, providing an alternative to Python’s general-purpose built-ins like dictionaries, lists, and tuples.
Counter is a sub-class that is used to count hashable objects. It implicitly creates a hash table of an iterable when invoked.
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elements() is one of the functions of Counter class, when invoked on the Counter object will return an itertool of all the known elements in the Counter object.
Parameters : Doesn’t take any parameters
Return type : Returns an itertool for all the elements with positive count in the Counter object
Errors and Exceptions :
-> It will print garbage value when directly printed because it returns an itertool, not a specific data-container.
-> If the count of an item is already initialized in Counter object, then it will ignore the ones with zero and negative values.
Code #1: Working of elements() on a simple data container
g g e e e e k k s s f o r
Code #2: Elements on a variety of Counter Objects with different data-containers
g g e e e e k k s s f o r geeks geeks geeks geeks for gfg gfg python python python 1 2 2 21 21 12 44 5 5 5 13 15 19 a a b b b c c c c c c d e e e e e
Code #3: To demonstrate what elements() return when it is printed directly
itertools.chain object at 0x037209F0
Code #4: When the count of an item in Counter is initialized with negative values or zero.
a : 2 a : 2 x : 3 x : 3 x : 3 b : 3 b : 3 b : 3 z : 1 y : 5 y : 5 y : 5 y : 5 y : 5
Note: We can infer from the output that items with values less than 1 are omitted by elements().
Counter object along with its functions are used collectively for processing huge amounts of data. We can see that Counter() creates a hash-map for the data container invoked with it which is very useful than by manual processing of elements. It is one of a very high processing and functioning tools and can even function with a wide range of data too.