Python SymPy Permutation.cardinality()方法
Permutation.cardinality() : cardinality()是一个sympy Python库函数,用于返回所有可能的排列组合的数量。
语法 : sympy.combinatorics.permutations.Permutation.cardinality()
返回:所有可能的排列组合的数量
代码#1:cardinality()示例
# Python code explaining
# SymPy.Permutation.cardinality()
# importing SymPy libraries
from sympy.combinatorics.partitions import Partition
from sympy.combinatorics.permutations import Permutation
# Using from sympy.combinatorics.permutations.Permutation.cardinality() method
# creating Permutation
a = Permutation([[2, 0], [3, 1]])
b = Permutation([1, 3, 5, 4, 2, 0])
print ("Permutation a - cardinality form : ", a.cardinality)
print ("Permutation b - cardinality form : ", b.cardinality)
输出 :
Permutation a – cardinality form : 24
Permutation b – cardinality form : 720
代码#2:cardinality()实例–二维排列组合
# Python code explaining
# SymPy.Permutation.cardinality()
# importing SymPy libraries
from sympy.combinatorics.partitions import Partition
from sympy.combinatorics.permutations import Permutation
# Using from sympy.combinatorics.permutations.Permutation.cardinality() method
# creating Permutation
a = Permutation([[2, 4, 0],
[3, 1, 2],
[1, 5, 6]])
print ("Permutation a - cardinality form : ", a.cardinality)
输出 :
Permutation a – cardinality form : 5040