I suggest you guys implement this as a library, if you want it.
You don't need to make your `partial_format` a method, it can just be a
normal function.
There's no need to fiddle with the built-in string or format function for
this.
On Fri, 28 Apr 2023, 22:27 Matsuoka Takuo, <motogeom...@gmail.com> wrote:
> What if it's done not by format method but by a separete method, say,
> format_partially or something? The method is different from format
> also in that it should leave "{{" and "}}" unaltered.
>
> On Fri, 28 Apr 2023 at 00:05, Matthias Görgens
> <matthias.goerg...@gmail.com> wrote:
> >
> > Does it have any use case that's not already served by functools.partial?
>
> I guess you mean given
>
> partially_formatted_string = unformatted_string.format(color="blue")
>
> that
>
> partially_formatted_string.format
>
> would be equivalent to
>
> partial(unformatted_string.format, color="blue")
>
> However, I think a partially formatted string can help since it will
> have other methods than format as well. For instance, given
>
> unformatted_string = '{color}{text}'
>
> doing the following thing only with functools.partial could require
> more care than you would be willing to give.
>
> string = (unformatted_string.format(color="blue")
> + unformatted_string
> ).format(text="Spanish", color="red")
>
> (One of the easiest ways might be
>
> ```
> from functools import partial
> from operator import call
>
> format_ = unformatted_string.format
> string = "".join(map(partial(call, text="Spanish"),
> (partial(format_, color="blue"),
> partial(format_, color="red"), )))
> ```
>
> However, note the following, more straight-forward code doesn't work:
>
> ```
> string = "".join(map(partial(call, text="Spanish", color="red"),
> (partial(format_, color="blue"),
> format_, )))
> ```
> )
>
> Now, how about this?
>
> ```
> format_ = '{a}{b}{c}'.format
>
> string = ((format_(a=a0) + format_(b=b0)).format(c=c0)
> + (format_(a=a1) + format_(c=c1)).format(b=b1)
> + (format_(b=b2) + format_(c=c2)).format(a=a2)
> ).format(a=a3, b=b3, c=c3)
> ```
>
> (For instance, the following code fails:
>
> ```
> from itertools import chain
>
> string = "".join(map(partial(call, a=a3, b=b3, c=c3),
> chain.from_iterable(
> map(map,
> (partial(partial, c=c0),
> partial(partial, b=b1),
> partial(partial, a=a2), ),
> ((partial(format_, a=a0),
> partial(format_, b=b0), ),
> (partial(format_, a=a1),
> partial(format_, c=c1), ),
> (partial(format_, b=b2),
> partial(format_, c=c2), ), ))
> )))
> ```
> )
>
> Best regards,
> Takuo Matsuoka
> _______________________________________________
> Python-ideas mailing list -- python-ideas@python.org
> To unsubscribe send an email to python-ideas-le...@python.org
> https://mail.python.org/mailman3/lists/python-ideas.python.org/
> Message archived at
> https://mail.python.org/archives/list/python-ideas@python.org/message/K5RPB4XOQROYTWQHI5A4DVTKB2RNY6OC/
> Code of Conduct: http://python.org/psf/codeofconduct/
>
_______________________________________________
Python-ideas mailing list -- python-ideas@python.org
To unsubscribe send an email to python-ideas-le...@python.org
https://mail.python.org/mailman3/lists/python-ideas.python.org/
Message archived at
https://mail.python.org/archives/list/python-ideas@python.org/message/BOTC5QLWI462NSNQCP6UT3FJ24Y2PMZS/
Code of Conduct: http://python.org/psf/codeofconduct/
