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Python - Sympy Prufer.to_tree()用法及代码示例

Prufer.to_tree():to_tree()是一个sympy Python库函数,它返回Prufer序列的树表示形式。

用法:
sympy.combinatorics.Prufer.prufer.to_tree()

返回:
Prufer序列的表示


代码1:to_tree()示例

# Python code explaining 
# SymPy.Prufer.to_tree() 
  
# importing SymPy libraries 
from sympy.combinatorics import Permutation, Cycle 
from sympy.combinatorics.prufer import Prufer 
  
# Using from  
# sympy.combinatorics.prufer.Prufer.to_tree() 
  
# Creating Prufer 
a = Prufer([1, 2, 3], [2, 4, 5], 4) 
  
# to_tree value 
print ("Prufer a to_tree : ", Prufer.to_tree([0, 2]))

输出:

Prufer a to_tree : [[0, 1], [0, 2], [2, 3]]

代码2:to_tree()示例

# Python code explaining 
# SymPy.Prufer.to_tree() 
  
# importing SymPy libraries 
from sympy.combinatorics import Permutation, Cycle 
from sympy.combinatorics.prufer import Prufer 
  
# Using from  
# sympy.combinatorics.prufer.Prufer.to_tree() 
  
# Creating Prufer 
b = Prufer([1, 2, 3, 2, 4, 5], [6, 7], [8], 4) 
  
# to_tree value 
print ("Prufer b to_tree : ", Prufer.to_tree([0, 2]))

输出:

Prufer b to_tree : [[0, 1], [0, 2], [2, 3]]



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