What’s New in Python 3.8

Re:What’s New in Python 3.8 by bhl on Monday October 14, 2019 @11:40PM (#21255358)

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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Re:What’s New in Python 3.8 by rcfox on Tuesday October 15, 2019 @12:15AM (#21255511)

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

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Re:What’s New in Python 3.8 by ash on Tuesday October 15, 2019 @09:27AM (#21258101)

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?

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Re:What’s New in Python 3.8 by bhl on Tuesday October 15, 2019 @11:35AM (#21259560)

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

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Re:What’s New in Python 3.8 by bhy on Tuesday October 15, 2019 @04:48AM (#21256662)

I think this is what you want:

https://github.com/r1chardj0n3s/parse

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