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SymPy | Permutation.runs() in Python
• Last Updated : 27 Aug, 2019

Permutation.runs() : runs() is a sympy Python library function that returns the runs of the permutation.

Runs = An ascending sequence in a permutation

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

Return : runs of the permutation.

Code #1 : runs() Example

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

Output :

Permutation a – runs form : [[2, 3], [0, 1]]
Permutation b – runs form : [[1, 3, 5], [4], [2], [0]]

Code #2 : runs() Example

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

Output :

Permutation a – runs form : [[3], [2, 4, 5], [0, 6], [1]]

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