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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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