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SymPy | Partition.prev_lex () in Python

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Partition.prev_lex (): prev_lex () — nice Python library function that returns the previous integer split n in lexographic order. This ordering wraps around [n] if section is [1,…, 1].

Syntax: sympy.combinatorics.partitions.Partition.prev_lex ()

Return: previous integer partition, n in lexographical order

Code # 1: prev_lex () example

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# Python code explaining
# SymPy.prev_lex ()

  
# import SymPy libraries

from sympy.combinatorics.partitions import Partition

from sympy.combinatorics.partitions import IntegerPartition

 
# Using the sympy.combinatorics method .partitions.Partition.prev_lex ()

p = IntegerPartition ([ 312 , 121 , 14 , 5 ])

 

print ( ’p:’ , p)

print ( ’Previous Integrer:’ , p.prev_lex ())

Logout:

p: [312, 121, 14, 5]

Previous Integrer: [312, 121, 14, 4, 1]

Code # 2: prev_lex () example

]

  
# Python code explaining
# SymPy.prev_lex ()

  
# import SymPy libraries

from sympy .combinatorics.partitions import Partition

from sympy.combinatorics.partitions import IntegerPartition

 
# Using the sympy.combinatorics.partitions.Partiti method on.prev_lex ()

p = IntegerPartition ([ 1 , 312 , 121 , 14

34 , 56 , 32 ])

 

print ( ’p:’ , p)

print ( ’Previous Integrer:’ , p.prev_lex ())

Output:

p: [312, 121, 56, 34, 32, 14, 1]

Previous Integrer: [312, 121, 56, 34, 32, 13, 2]

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