# Issue

*This Content is from Stack Overflow. Question asked by Mr.daq *

If I know 3 vertex points in 3d space, how can I get Spherical coordinates with python?

```
def carttosph(x,y,z):
Xsq_Ysq = x**2 + y**2
r = m.sqrt(Xsq_Ysq + z**2)
v = m.atan2(m.sqrt(Xsq_Ysq),z)
z = m.atan2(y,x)
return r,z ,v
```

# Solution

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