PrintTableMetricsCallback does not handle metrics with periods

[anaoum]

🐛 Bug

When logged metrics have a period, the PrintTableMetricsCallback produces a KeyError.

To Reproduce

Code sample

from pl_bolts.callbacks.printing import dicts_to_table

print(dicts_to_table([{"metrics/class.a": 0.5}]))

Expected behavior

metrics/class.a
---------------
0.5

Actual behavior

Traceback (most recent call last):
  File "/home/coder/temp.py", line 3, in <module>
    dicts_to_table([{"metrics/class.a": 0.5}])
  File "/home/coder/.direnv/python-3.8.10/lib/python3.8/site-packages/pl_bolts/utils/stability.py", line 87, in wrapper
    return cls_or_callable(*args, **kwargs)
  File "/home/coder/.direnv/python-3.8.10/lib/python3.8/site-packages/pl_bolts/callbacks/printing.py", line 129, in dicts_to_table
    line = s.format(**d, **marked_values)
KeyError: 'metrics/class'

Environment

• PyTorch Version (e.g., 1.0): 1.12.1+cu116
• OS (e.g., Linux): Linux
• How you installed PyTorch (conda, pip, source): pip
• Build command you used (if compiling from source): N/A
• Python version: 3.8
• CUDA/cuDNN version: 11.6
• GPU models and configuration: N/A
• Any other relevant information: N/A

Additional context

The underlying problem is here, python format strings cannot have a period in variable names. To reproduce underlying issue:

"{metrics/class.a}".format(**{"metrics/class.a": 0.5})

[Borda]

@anaoum, would you be interested in sending a fix? :)