# SymPy | Prufer.rank() in Python

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

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

Return :
rank of the Prufer sequence

Code #1 : rank() Example

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

Output :

Prufer a rank : 38

Code #2 : rank() Example

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

Output :

Prufer b rank : 42661

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