Python | sympy.count() method

Using the count() method in the sympy module, we can count the number of variables used in the mathematical function. count() method returns the number of variables used in the mathematical function.

Syntax : sympy.count(x)

Return : the count of variables.

Code #1: With the help of the below examples, we can clearly understand that using sympy.count() method we can count the number of variables in a given expression. 

Python3

# importing sympy library
from sympy import *

# taking symbols
x, y, z = symbols('x y z')

# calling count() method on expression
geek = sqrt((x + 1)**2 + x).count(x)
print(geek)

Output: 

2

Code #2: 

Python3

# importing sympy library
from sympy import *

# taking symbols
a, b = symbols('a b')

# calling count() method on expression
geek = (log(a) + log(b) + log(a)*log(1 / b)).count(log)
print(geek)

Output: 

4

Code #3: 

Python3

# importing sympy library
from sympy import *

# taking symbols
a, b = symbols('a b')

# calling count() method on expression
geek = (log(a * b**(1 - log(a)))).count(b)
print(geek)

Output: 

1