SymPy | Python中的 Subset.subset_indices()

Subset.subset_indices() ：subset_indices()是一个 sympy Python库函数，它返回列表中超集中子集的索引

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

Return :
the indices of subset in superset in a list
if all elements of subset are not in superset. – list is empty

代码 #1：subset_indices() 示例

# Python code explaining
# SymPy.Subset.subset_indices()
  
# importing SymPy libraries
from sympy.combinatorics import Permutation, Cycle
from sympy.combinatorics.subsets import Subset
  
# Using from 
# sympy.combinatorics.subset.Subsets.subset_indices()
  
# superset
super_set = [4, 3, 2, 7]
  
# Creating Subset
a = Subset.subset_indices((['geek', 'for', 'c', 'd']), super_set)
  
# subset_indices value
print ("Subset a subset_indices : ", a)

输出 ：

Subset a subset_indices : []

代码 #2：subset_indices() 示例

# Python code explaining
# SymPy.Subset.subset_indices()
  
# importing SymPy libraries
from sympy.combinatorics import Permutation, Cycle
from sympy.combinatorics.subsets import Subset
  
# Using from 
# sympy.combinatorics.subset.Subsets.subset_indices()
  
# superset
super_set = [4, 3, 2, 7]
  
# Creating Subset
a = Subset.subset_indices(([2, 3, 4]), super_set)
  
# subset_indices value
print ("Subset a subset_indices : ", a)

输出 ：

Subset a subset_indices : [2, 1, 0]