feat: Langfuse SDKs should log an error and be disabled when keys are not provided

[marcklingen]

Discussed in https://github.com/orgs/langfuse/discussions/1488

^{Originally posted by MrMojoR March 25, 2024}

Describe the feature or potential improvement

It would be great if Langfuse functionality can be turned off. I use the decorators, and if the Langfuse backend is not configured it logs a lot of errors, so I would like to have a parameter, where I can turn off the functionality so I won't get errors when the parameters are not configured. Thanks!

Additional information

No response

[marcklingen]

See discussion in #1829 for additional context

[Jqnxyz]

+1 For this feature. It's incredibly tough to push for Langfuse adoption for projects when devs who don't need tracing on local machine have no choice but to endure the barrage of errors. It would be great if Langfuse disables itself when either public/secret keys are missing (as suggested).

Though ideally I'd like to see Langfuse's "magic" enabled explicitly, allowing us to configure the "global" langfuse instance that's used in things like @observe decorators. See Sentry's SDK for a good example
i.e.

import sentry_sdk

sentry_sdk.init(
    enable_tracing=True,
)

[marcklingen]

This is work in progress including a disabled flag to turn off the "magic", thanks for your comment @Jqnxyz