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SymPy | Permutation.is_Identity() in Python
• Last Updated : 26 Aug, 2019

Permutation.is_Identity() : is_Identity()
is a sympy Python library function that checks whether the Permutation is an identity permutation.

Syntax : sympy.combinatorics.permutations.Permutation.is_Identity()

Return : true – if he Permutation is an identity permutation; otherwise false

Code #1 : is_Identity() Example

 `# Python code explaining``# SymPy.Permutation.is_Identity()`` ` `# importing SymPy libraries``from` `sympy.combinatorics.partitions ``import` `Partition``from` `sympy.combinatorics.permutations ``import` `Permutation`` ` `# Using from sympy.combinatorics.permutations.Permutation.is_Identity() method `` ` `# creating Permutation``a ``=` `Permutation([[``2``, ``0``], [``3``, ``1``]])`` ` `b ``=` `Permutation([``1``, ``3``, ``5``, ``4``, ``2``, ``0``])`` ` `print` `(``"Permutation a - is_Identity form : "``, a.is_Identity)``print` `(``"Permutation b - is_Identity form : "``, b.is_Identity)`

Output :

Permutation a – is_Identity form : False
Permutation b – is_Identity form : False

Code #2 : is_Identity() Example – 2D Permutation

 `# Python code explaining``# SymPy.Permutation.is_Identity()`` ` `# importing SymPy libraries``from` `sympy.combinatorics.partitions ``import` `Partition``from` `sympy.combinatorics.permutations ``import` `Permutation`` ` `# Using from sympy.combinatorics.permutations.Permutation.is_Identity() method `` ` `# creating Permutation``a ``=` `Permutation([[``2``, ``4``, ``0``], ``                 ``[``3``, ``1``, ``2``],``                 ``[``1``, ``5``, ``6``]])`` ` ` ` `print` `(``"Permutation a - is_Identity form : "``, a.is_Identity)`

Output :

Permutation a – is_Identity form : False

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