On Sat, 26 Nov 2022 at 07:13, Teo <[email protected]> wrote:
>
> Hi all. I just started using Sympy this week. According to this video, when 
> the following code was run, the units of ohm would be returned in SI base 
> units.
>
> import sympy.physics.units as u
> u.ohm
>
> However, when I tried, I got the symbol omega instead. Is there a method to 
> obtain the same SI base units (kgm^2)/(A^2s^3)?

You can do it like this:

In [1]: import sympy.physics.units as u

In [3]: u.convert_to(u.ohm, [u.kg,u.m,u.ampere,u.s])
Out[3]:
              2
kilogram⋅meter
───────────────
      2       3
ampere ⋅second

Probably there should be an easier way. It's also possible like this:

In [4]: u.convert_to(u.ohm, u.si.SI._base_units)
Out[4]:
              2
kilogram⋅meter
───────────────
      2       3
ampere ⋅second

In [5]: u.si.SI._base_units
Out[5]: (meter, kilogram, second, ampere, mole, candela, kelvin)

That's using _base_units which has a leading underscore indicating
that it should be considered "private". I don't see why it should be
considered private though...

Oscar

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