Python | SymPy 置换. cardinality()方法
arrangement.cardinality():cardinality()是一个 sympy Python 库函数，返回所有可能的排列个数。
语法:sympy.combinations .排列.置换.基数()
返回:所有可能的排列数
代码#1:基数()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:
排列 a–基数形式:24 排列 b–基数形式:720
代码#2:基数()示例–2D 置换
# 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:
排列 a–基数形式:5040
