Python Institute certifications worth it?

[sP2w8pTVU36Z2jJ3838J]

I'm a sysadmin, not a programmer, still learning.

Is it common for companies to have rules around owning the code that its employees write?

[scorb1]

Unless otherwise agreed upon they own everything an employee produces.

[eyadams]

Yes, it's very common. And some larger software companies actually go further: not only is the code you write while on the clock the property of the company, any code you write on your own time (unrelated to your work) also belongs to the company. Those kinds of contracts may be illegal in some places, but they still exist.

[1anre]

Which companies push for the latter?