SymPy | Prufer.unrank() in Python

Prufer.unrank() : unrank() is a sympy Python library function that returns the unranked Prufer sequence.

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

Return :
unranked Prufer sequence

Code #1 : unrank() Example

# Python code explaining
# SymPy.Prufer.unrank()

# importing SymPy libraries
from sympy.combinatorics import Permutation, Cycle
from sympy.combinatorics.prufer import Prufer

# Using from
# sympy.combinatorics.prufer.Prufer.unrank()

# Creating Prufer
a = Prufer([1, 2, 3], [2, 4, 5])

# unrank value
# rank = 2
# n = 5
print ("Prufer a unrank : ", a.unrank(2, 5))

Output :

Prufer a unrank : 125

Code #2 : unrank() Example

# Python code explaining
# SymPy.Prufer.unrank()

# importing SymPy libraries
from sympy.combinatorics import Permutation, Cycle
from sympy.combinatorics.prufer import Prufer

# Using from
# sympy.combinatorics.prufer.Prufer.unrank()

# Creating Prufer
b = Prufer([1, 2, 3, 2, 4, 5], [6, 7], [8])

# unrank value
# rank = 2
# n = 5
print ("Prufer b unrank : ", b.unrank(2, 5))

Output :

Prufer b unrank : Prufer([0, 0, 2])