I have a python project. The folder structure is like the following:

????src
 ┣ ????utils
 ┃ ┣ ????custom_pow.py
 ┃ ┣ ????equation.py
 ┃ ┗ ????__init__.py
 ┣ ????app.py
 ┗ ????__init__.py

custom_pow.py

class Pow:
    def __init__(self,a,n):
        self.a = a
        self.n = n
    def pow(self):
        out = self.a ** self.n
        return out

equation.py

from src.utils.custom_pow import Pow
class CustFormula:
    def __init__(self,a,b):
        self.a = a
        self.b = b
    def apbwsq(self):
        ap = Pow(self.a,2)
        bp = Pow(self.b,2)
        out = (ap.pow()) + (2*self.a*self.b) + (bp.pow())
        return out
    def apbwcub(self):
        aap = Pow(self.a,3)
        bbp = Pow(self.b,3)
        ap = Pow(self.a,2)
        bp = Pow(self.b,2)
        out = (aap.pow()) + (bbp.pow()) + 3*ap.pow()*self.b + 3*bp.pow()*self.a
        return out

app.py

from src.utils.equation import CustFormula

p = CustFormula(2,3)
out = p.apbwsq()

print(f"(2+3)^2 = {out}")

I am pretty new to Python packaging. As per my understanding if we put init.py it will be considered as a module.

But while I am running the app.py from the src folder I am getting the below error:

File "********module-testsrcapp.py", line 2, in <module>
    from src.utils.equation import CustFormula
ModuleNotFoundError: No module named 'src'

Please help me to solve this.