Python | sympy.sympify() method

With the help of sympy.sympify() method, we are able to convert the expression of string type to general mathematical expression.

Syntax : sympy.sympify()
Return : Return the expression.

Example #1 :
In this example we can see that by using sympy.sympify(), we are converting the string of expression into real mathematical expression.

# Import sympy
from sympy import *

# Define symbols and trigo expression
x, y = symbols('x y')
expn = "x**2 + 3 * x - 1 / 2"

# Use sympy.sympify() method
gfg = sympify(expn)

print(gfg)

Output :

x**2 + 3*x – 1/2

Example #2 :

# Import sympy
from sympy import *

# Define symbols and trigo expression
x, y = symbols('x y')
expn = "x**2 + 3 * x - 1 / 2"

# Use sympy.sympify() method
gfg = sympify(expn)
gfg = gfg.subs(x, 3)

print(gfg)

Output :

35/2