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
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