Python Sympy Partition.prev_lex()用法及代码示例

Partition.prev_lex()：prev_lex()是一个sympy Python库函数，按字典顺序返回前一个整数分区n。如果分区为[1，…，1]，则此顺序环绕[n]。

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

返回：前一个整数分区，按字母顺序排列n

代码1：prev_lex()示例

] 
  
# Python code explaining 
# SymPy.prev_lex() 
  
# importing SymPy libraries 
from sympy.combinatorics.partitions import Partition 
from sympy.combinatorics.partitions import IntegerPartition 
  
# Using from sympy.combinatorics.partitions.Partition.prev_lex() method  
p = IntegerPartition([312, 121, 14, 5]) 
  
print('p : ', p) 
print('\nPrevious Integrer : ', p.prev_lex())

输出：

p : [312, 121, 14, 5]

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

代码2：prev_lex()示例

] 
  
# Python code explaining 
# SymPy.prev_lex() 
  
# importing SymPy libraries 
from sympy.combinatorics.partitions import Partition 
from sympy.combinatorics.partitions import IntegerPartition 
  
# Using from sympy.combinatorics.partitions.Partition.prev_lex() method  
p = IntegerPartition([1, 312, 121, 14,  
                      34, 56, 32]) 
  
print('p : ', p) 
print('\nPrevious Integrer : ', p.prev_lex())

输出：

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

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

相关用法

注：本文由纯净天空筛选整理自noobestars101大神的英文原创作品 SymPy | Partition.prev_lex() in Python。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。