同情| prufer.prev()用 Python
哎哎哎:# t0]https://www.geeksforgeeks.orgy-pruder-prev-in-python/
Prufer.prev() : prev() 是一个 sympy Python 库函数,返回当前序列之前的 delta 的 Prufer 序列。
语法: 友好。组合者。prufer.prufer.prev()
返回: 当前序列之前的增量序列
代码#1 : prev()示例
# Python code explaining
# SymPy.Prufer.prev()
# importing SymPy libraries
from sympy.combinatorics import Permutation, Cycle
from sympy.combinatorics.prufer import Prufer
# Using from
# sympy.combinatorics.prufer.Prufer.prev()
# Creating Prufer
a = Prufer([1, 2, 3], [2, 4, 5])
# prev value
print ("Prufer a prev : ", a.prev(1))
输出:
prufer a 预测:pruder([1,2,4])
代码#2 : prev()示例
# Python code explaining
# SymPy.Prufer.prev()
# importing SymPy libraries
from sympy.combinatorics import Permutation, Cycle
from sympy.combinatorics.prufer import Prufer
# Using from
# sympy.combinatorics.prufer.Prufer.prev()
# Creating Prufer
b = Prufer([1, 2, 3, 2, 4, 5], [6, 7], [8])
# prev value
print ("Prufer b prev : ", b.prev(1))
输出:
预测的缓冲区 b:缓冲区([1,2,3,2,4,4])