Python | sympy from_rgs() method

Namachila October 13, 2025

0 1 1 minute read

With the help of sympy.combinatorics.Partition.from_rgs() method, we can get the array of subarrays by passing array of indexes and list of members by using sympy.combinatorics.Partition.from_rgs() method.

Syntax : sympy.combinatorics.Partition.from_rgs()

Return : Return the array of subarrays.

Example #1 :
In this example we can see that by using sympy.combinatorics.Partition.from_rgs() method, we are able to get the array of subarray by passing array of indexes and list of members as passed by parameters.

# import sympy and Relational 
from sympy.combinatorics.partitions import Partition 
from sympy import * 
  
x, y = symbols('x y') 
  
# Using from sympy.combinatorics.Partition.from_rgs() method 
gfg = Partition.from_rgs([0, 1, 2, 0, 1, 2], list('abcdef')) 
  
print(gfg) 

Output :

{{a, d}, {b, e}, {c, f}}

Example #2 :

# import sympy and Relational 
from sympy.combinatorics.partitions import Partition 
from sympy import * 
  
x, y = symbols('x y') 
  
# Using from sympy.combinatorics.Partition.from_rgs() method 
gfg = Partition.from_rgs([0, 1, 2, 0, 1, 2, 3, 4, 3, 4, 0, 1, 5], 
                          list('abcdefghijklm')) 
  
print(gfg) 