Python 中的 SymPy | subset.prev_dictionary graphic()
原文:https://www.geesforgeks.org/sympy-subset-prev_dictionary graphic-in-python/
subset.prev_dictionary():prev_dictionary()是一个 sympy Python 库函数，返回之前的字典序子集。
语法: sympy.combinations.subset.subset.prev_dictionary graphic()
返回: 之前的格雷码有序子集。
代码# 1:prev_词典()示例
# Python code explaining
# SymPy.Subset.prev_lexicographic()
# importing SymPy libraries
from sympy.combinatorics import Permutation, Cycle
from sympy.combinatorics.subsets import Subset
# Using from
# sympy.combinatorics.subset.Subsets.prev_lexicographic()
# Creating Subset
a = Subset(['c', 'd'], ['geek', 'for', 'c', 'd'])
# prev_lexicographic value
print ("Subset a prev_lexicographic : ", a.prev_lexicographic().subset)
输出:
子集 a prev_词典顺序:['c']
代码# 2:prev_词典()示例
# Python code explaining
# SymPy.Subset.prev_lexicographic()
# importing SymPy libraries
from sympy.combinatorics import Permutation, Cycle
from sympy.combinatorics.subsets import Subset
# Using from
# sympy.combinatorics.subset.Subsets.prev_lexicographic()
# Creating Subset
a = Subset([2, 3, 4], [1, 2, 3, 4, 5])
# prev_lexicographic value
print ("Subset a prev_lexicographic : ", a.prev_lexicographic().subset)
输出:
子集 a prev_字典顺序:[2，3]
