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Comment by bhl | Hacker News Reader

Why didn’t Python ship with the opposite functionality as well? Parsing instead of formatting. Given a string and a format string, return a list of variables (or a dictionary).

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It did! https://docs.python.org/3/library/string.html#string.Formatt...

Are you talking about parsing f-strings? How would that look like?

As far I understand the following:

    print(f"your name is {name}")

is roughly equivalent to:

    print(f"your name is " + format(name))

What is there to parse?

For example, to checkpoint a model, I would save it as “ckpt-{epoch_number}-{val_loss}”. Given this file name and the original format string, I would like to recover the epoch number and validation loss variables back.

From: ckpt-8-0.300 To: epoch=8, val_loss=0.300

I think this is what you want:

https://github.com/r1chardj0n3s/parse

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