What is substitution operation in Sympy

This recipe explains what is substitution operation in Sympy

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Recipe Objective - What is substitution operation in Sympy?

The subs() function in SymPy replaces all occurrences of the first parameter with the second. Substitution is the basic operations that must be performed in a mathematical expression.

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Example:

# Importing libraries
from sympy import pprint
from sympy.abc import p

# Defining some expressions
exp1 = (2*(p**2)-8)

# Printing both expressions
pprint(exp1)

# substituting the value of p as 10
exp1.subs(p,10)

Output - 
   2    
2.p  - 8
192

In this way, we can use subs() function in sympy.

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