SymPy | Subset.rank_gray() in Python

• Last Updated : 26 Aug, 2019

Subset.rank_gray() : rank_gray() is a sympy Python library function that returns the Gray code ranking of the subset.

Syntax :
sympy.combinatorics.subset.Subset.rank_gray()

Return :
Gray code ranking of the subset

Code #1 : rank_gray() Example

 `# Python code explaining``# SymPy.Subset.rank_gray()`` ` `# importing SymPy libraries``from` `sympy.combinatorics ``import` `Permutation, Cycle``from` `sympy.combinatorics.subsets ``import` `Subset`` ` `# Using from ``# sympy.combinatorics.subset.Subsets.rank_gray()`` ` `# Creating Subset``a ``=` `Subset([``'c'``, ``'d'``], [``'geek'``, ``'for'``, ``'c'``, ``'d'``])`` ` `# rank_gray value``print` `(``"Subset a rank_gray : "``, a.rank_gray)`

Output :

Subset a rank_gray : 2

Code #2 : rank_gray() Example

 `# Python code explaining``# SymPy.Subset.rank_gray()`` ` `# importing SymPy libraries``from` `sympy.combinatorics ``import` `Permutation, Cycle``from` `sympy.combinatorics.subsets ``import` `Subset`` ` `# Using from ``# sympy.combinatorics.subset.Subsets.rank_gray()`` ` `# Creating Subset``a ``=` `Subset([``2``, ``3``, ``4``], [``1``, ``2``, ``3``, ``4``, ``5``])`` ` `# rank_gray value``print` `(``"Subset a rank_gray : "``, a.rank_gray)`

Output :

Subset a rank_gray : 11

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