Python string permutations
The permutations() function makes it simple to complete a task like discovering every possible arrangement of the letters in a Python string.
EXAMPLE
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OUTPUT
The itertools object is returned by the function permutations() in exchange for a String parameter. If we attempt to print the variable "per" directly, we will obtain the results shown below:
So, in order to print each entry, a loop must be run.
Multiple-number permutations
We must supply the numbers as a list, set, or tuple in order to find their permutations of them because the permutations() function accepts an iterable input.
EXAMPLE
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OUTPUT
We include all the digits or characters in the permutation calculation methods mentioned above. The permutations can have a maximum or a minimum number of elements.
Combinations with a specific number of components
This can be done by passing an integer after the set of elements, much like the concept of "nPr," which states "Arranging r elements out of n."
EXAMPLE
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OUTPUT
The permutations() method is instructed to arrange only two elements at a time from the given list of integers in the code snippet above.
Words with multiple letter combinations
combinations() is the function to use if you need to find all combinations that contain exactly 2 letters from a given word.
EXAMPLE
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OUTPUT
Sets of numbers combined
It is possible to achieve numbers in a list, similar to the combos result we got for letters in a word.
Example
OUTPUT
Repetition of numerical combinations
Let's run an example of the aforementioned Note to further illustrate it.
EXAMPLE
OUTPUT
Given that the numbers in the list are repeated, the outcome is obvious.
Number combinations that include themselves
Combinations with replacement is a further function in the itertools package that relates to permutations and combinations (). This function is a variant of combinations(), with the minor difference that it also takes into account combinations of the elements with each other.
EXAMPLE
OUTPUT
When identical arguments are supplied to the combinations() function, we can clearly distinguish between the output from the above query and the output from that query.
Numbers can be combined with one another such that more than one instance of them appears in the list. This basically occurs because the aforementioned function sets the same value when we select an element from the list in order to create combinations with other elements.