Outdated documentation for loggers

[quinor]

Custom logger example doesn't work:
https://pytorch-lightning.readthedocs.io/en/latest/loggers.html#custom-logger

General loggers example doesn't work either due to missing parameters for the loggers.* class constructors:
https://pytorch-lightning.readthedocs.io/en/latest/pytorch_lightning.loggers.html#module-pytorch_lightning.loggers

[stale]

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[Borda]

@quinor sorry for the delay, mind sending PR with the update? 🐰

[rbracco]

I've had a lot of issues with outdated documentation. For instance with lr_find the docs say 2 different things in 2 different places and theyre both wrong. Maybe we could start an effort to overhaul the docs to reflect the latest changes.

The instructions in the trainer section say

# default used by the Trainer (no learning rate finder)
trainer = Trainer(auto_lr_find=False)

# call tune to find the lr
trainer.tune(model)

in the lr_finder section of Common Use Cases they say

model = MyModelClass(hparams)
trainer = Trainer()

# Run learning rate finder
lr_finder = trainer.tuner.lr_find(model)

# Results can be found in
lr_finder.results

# Plot with
fig = lr_finder.plot(suggest=True)
fig.show()

but neither work. It turns out lr_find is currently broken because it doesnt accept a datamodule and theres a fix in progress #3425