SymPy | Prufer.prev() in Python

SymPy | Prufer.tree_repr() in Python

Last Updated : 26 Aug, 2019

Prufer.tree_repr() : tree_repr() is a sympy Python library function that returns the tree representation of Prufer sequence.

Syntax :
sympy.combinatorics.Prufer.prufer.tree_repr()

Return :
tree representation of Prufer sequence

Code #1 : tree_repr() Example

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

Output :

Prufer a tree_repr : [[0, 1], [1, 2], [2, 3], [3, 4]]

Code #2 : tree_repr() Example

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

Output :

Prufer b tree_repr : [[0, 1], [1, 2], [3, 6], [2, 3], [2, 4], [4, 5], [5, 7]]

SymPy | Prufer.prev() in Python

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