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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 libraries``from` `sympy.combinatorics.partitions ``import` `Partition``from` `sympy.combinatorics.permutations ``import` `Permutation`` ` `# Using from sympy.combinatorics.permutations.Permutation.runs() method `` ` `# creating Permutation``a ``=` `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], , , ]

Code #2 : runs() Example

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

Output :

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

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