Actually, there are no dependencies needed, other than some base python libraries like `math`, but if it's already there, does it really count? 😉
That aside, here's the formula for calculating the volume of a cylinder in python:
```py
from math import pi

def cylinder_volume(radius, height):
        base_circle_area = r ** 2 * pi
        volume = base_circle_area * height
        return volume
```
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