Subset.prev_lexicographic() : prev_lexicographic() is a sympy Python library function that returns the previous lexicographically ordered subset.
Syntax :
sympy.combinatorics.subset.Subset.prev_lexicographic()Return :
the previous Gray code ordered subset.
Code #1 : prev_lexicographic() Example
# 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) |
Output :
Subset a prev_lexicographic : [‘c’]
Code #2 : prev_lexicographic() Example
# 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) |
Output :
Subset a prev_lexicographic : [2, 3]
