Python | sympy.replace() method

With the help of sympy.replace() method, we can replace the functions in the mathematical expression without editing the whole expression by using sympy.replace() method.

Syntax : sympy.replace()
Return : Return the replaced values in the mathematical expression.

Example #1 :
In this example we can see that by using sympy.replace() method, we are able to replace the mathematical functions in the expression and return the updated expression.

# import sympy
from sympy import *

x, y = symbols('x y')

f = sin(x) + cos(2 * x)

# Use sympy.replace() method
gfg = f.replace(cos, sin)

print(gfg)

Output :

sin(x) + sin(2*x)

Example #2 :

# import sympy
from sympy import *

x, y = symbols('x y')

f = log(sin(x)) + tan(cos(2 * x))
# Use sympy.replace() method
gfg = f.replace(log, tan)

print(gfg)

Output :

tan(sin(x)) + tan(cos(2*x))