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Python 中的 SymPy | Subset.prev_gray()

原文:https://www.geesforgeks.org/sympy-subset-prev_gray-in-python/

subset.prev_gray():prev_Gray()是一个 sympy Python 库函数,返回之前的 Gray 码有序子集。

语法: sympy.combinations.subset.subset.prev_gray()

返回: 之前的格雷码有序子集。

代码#1 : prev_gray()示例

# Python code explaining
# SymPy.Subset.prev_gray()

# importing SymPy libraries
from sympy.combinatorics import Permutation, Cycle
from sympy.combinatorics.subsets import Subset

# Using from 
# sympy.combinatorics.subset.Subsets.prev_gray()

# Creating Subset
a = Subset(['c', 'd'], ['geek', 'for', 'c', 'd'])

# prev_gray value
print ("Subset a prev_gray : ", a.prev_gray().subset)

输出:

子集 a prev_gray : ['d']

代码#2 : prev_gray()示例

# Python code explaining
# SymPy.Subset.prev_gray()

# importing SymPy libraries
from sympy.combinatorics import Permutation, Cycle
from sympy.combinatorics.subsets import Subset

# Using from 
# sympy.combinatorics.subset.Subsets.prev_gray()

# Creating Subset
a = Subset([2, 3, 4], [1, 2, 3, 4, 5])

# prev_gray value
print ("Subset a prev_gray : ", a.prev_gray().subset)

输出:

子集 a prev_gray : [2,3,4,5]



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