SymPy | Python中的 Subset.unrank_gray()

Subset.unrank_gray() ：unrank_gray()是一个 sympy Python库函数，它返回指定等级的格雷码有序子集。

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

Return :
the Gray code ordered subset of the specified rank.

代码 #1：unrank_gray() 示例

# Python code explaining
# SymPy.Subset.unrank_gray()
  
# importing SymPy libraries
from sympy.combinatorics import Permutation, Cycle
from sympy.combinatorics.subsets import Subset
  
# Using from 
# sympy.combinatorics.subset.Subsets.unrank_gray()
  
# Creating Subset
a = Subset.unrank_gray(4, (['geek', 'for', 'c', 'd']))
  
# unrank_gray value
print ("Subset a unrank_gray : ", a.subset)

输出 ：

Subset a unrank_gray : [‘for’, ‘c’]

代码 #2：unrank_gray() 示例

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

输出 ：

Subset a unrank_gray : [2, 3]