`op item create` freezing when run from python

Trying to automate creating user accounts and sending their passwords via a 1password URL secret share

If I issue the command op item create in my shell normally (with or without the proper args) I get a response

If I issue the command op item create via python os.system() or subprocess.run() it hangs with no output.
op account list and op item list and other non op list create commands work in python

I'm on op -v 2.7.2

Thanks!

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