[IPython-dev] Deprecating the IPython Color* API & IPython Theming

Aaron Meurer asmeurer at gmail.com
Tue Nov 10 02:09:47 EST 2015

I hope you also take this opportunity to make it easier for people to
customize their prompts. You have to go through some silly hoops
(which IIRC aren't really documented) to make the prompt execute some
code every time it is displayed, which is necessary to do things like
put the date or cwd in your prompt. I also found it annoying that I
couldn't just inject something into some dictionary (I forget which at
this point) because in IPython's type system dictionaries are
immutable for some reason.

I also want to say that I'm stoked that IPython is finally getting
proper theming support in the terminal.

Aaron Meurer

On Tue, Nov 10, 2015 at 12:02 AM, Matthias Bussonnier
<bussonniermatthias at gmail.com> wrote:
> Hello list,
> TL;DR:
> Who is relying on IPython.utils.Pycolorize.Parser, and other ColorAnsi
> functionality ?
> I’m wondering if/how much deprecation time and backward compatibility is
> needed.
> Are you using “Embed” in esoteric ways (like through pexpect/subprocess ?)
> Please speak now.
> Longer version
> Hi all, I’m working on refactoring all the ANSI code handling of IPython[1].
> Some code in here is more than a decade old, and have a lot a redundant
> code, which often now
> is available with a better API[2] in libraries like Pygments.
> This part of the code also deals with prompt formatting Because yes you can
> put CWD,
> and date in IPython prompt if you like, and in color, and it is relatively
> annoying to keep compatibility with old and new API
> at the same time.
> So are any of you heavy users of the API in these region of the code base ?
> If so can you point me at your usage, so that I could make the migration to
> the new API
> easier in your use case ?
> Also if you are using IPython-embed through Expect or subprocess and alike,
> the new ASCII escape sequence
> might break previously made assumptions, I want to make sure these are not
> broken either.
> Thank you for reading me until the end, here is a gif[3][4] of the potential
> new IPython themes as a reward.
> --
> [1] https://github.com/ipython/ipython/pull/8966
> [2] well, mostly, the naming of ascii color is discutable.
> [3]
> https://twitter.com/Mbussonn/status/663953838521520128?cn=cmV0d2VldA%3D%3D&refsrc=email
> [4] It’s pronounced Jif not Gif:
> http://mashable.com/2014/07/16/how-to-say-gif/#FQuOGTRNREqp
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