SymPy from inside Emacs

SymPy from inside Emacs

[Andreas Röhler]

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Hi,

the Python module SymPy displays math formulas. Running in a 
bash-terminal at Xubuntu that works nicely.
 From Emacs however, the spaces in the upper line are wider than the 
chars below.

See attached sympy.png.

That way, displaying the exponents goes wrong. See the "5" at EOL in 
upper line belong to last char "y" in line below. Whilst the 
column-numbers are correct, i.e. respective.

Any help?

Thanks,
Andreas


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Re: SymPy from inside Emacs

[Eli Zaretskii]

> Date: Fri, 13 May 2022 09:34:14 +0200
> From: Andreas Röhler <andreas.roehler@easy-emacs.de>
> 
> the Python module SymPy displays math formulas. Running in a 
> bash-terminal at Xubuntu that works nicely.
>  From Emacs however, the spaces in the upper line are wider than the 
> chars below.
> 
> See attached sympy.png.

I think that's because the · character (or something similar) used to
depict the multiplication comes from another font, one that is not
fixed-pitch and/or whose width is different from that of the default
font.  The spaces are not the cause of this, they come from the
default font and are always of the same width.

Re: SymPy from inside Emacs

[Andreas Röhler]

Am 13.05.22 um 09:47 schrieb Eli Zaretskii:
>> Date: Fri, 13 May 2022 09:34:14 +0200
>> From: Andreas Röhler<andreas.roehler@easy-emacs.de>
>>
>> the Python module SymPy displays math formulas. Running in a
>> bash-terminal at Xubuntu that works nicely.
>>   From Emacs however, the spaces in the upper line are wider than the
>> chars below.
>>
>> See attached sympy.png.
> I think that's because the · character (or something similar) used to
> depict the multiplication comes from another font, one that is not
> fixed-pitch and/or whose width is different from that of the default
> font.  The spaces are not the cause of this, they come from the
> default font and are always of the same width.
>
Font was       ftcrhb:-1ASC-Liberation Mono-regular-normal-normal-*-...

Re: SymPy from inside Emacs

[Eli Zaretskii]

> Date: Fri, 13 May 2022 10:01:22 +0200
> From: Andreas Röhler <andreas.roehler@easy-emacs.de>
> 
> > I think that's because the · character (or something similar) used to
> > depict the multiplication comes from another font, one that is not
> > fixed-pitch and/or whose width is different from that of the default
> > font.  The spaces are not the cause of this, they come from the
> > default font and are always of the same width.
> >
> Font was       ftcrhb:-1ASC-Liberation Mono-regular-normal-normal-*-...

For that single character or for the regular buffer text? or for both?

My point is that if the default font doesn't support the
"multiplication" character, you cannot expect the lines to align in
Emacs.

Re: SymPy from inside Emacs

[Andreas Röhler]

Am 13.05.22 um 12:38 schrieb Eli Zaretskii:
>> Date: Fri, 13 May 2022 10:01:22 +0200
>> From: Andreas Röhler<andreas.roehler@easy-emacs.de>
>>
>>> I think that's because the · character (or something similar) used to
>>> depict the multiplication comes from another font, one that is not
>>> fixed-pitch and/or whose width is different from that of the default
>>> font.  The spaces are not the cause of this, they come from the
>>> default font and are always of the same width.
>>>
>> Font was       ftcrhb:-1ASC-Liberation Mono-regular-normal-normal-*-...
> For that single character or for the regular buffer text? or for both?


For all. Emacs started like "emacs --debug-init --font 'Liberation Mono-14"

>
> My point is that if the default font doesn't support the
> "multiplication" character, you cannot expect the lines to align in
> Emacs.
>

Re: SymPy from inside Emacs

[Eli Zaretskii]

> Date: Fri, 13 May 2022 12:42:20 +0200
> From: Andreas Röhler <andreas.roehler@easy-emacs.de>
> 
> >> Font was       ftcrhb:-1ASC-Liberation Mono-regular-normal-normal-*-...
> > For that single character or for the regular buffer text? or for both?
> 
> 
> For all. Emacs started like "emacs --debug-init --font 'Liberation Mono-14"

Then I guess that font is not really monospaced.  I see you've solved
this by using a different font.

Re: SymPy from inside Emacs

[Andreas Röhler]

Am 13.05.22 um 09:47 schrieb Eli Zaretskii:
>> Date: Fri, 13 May 2022 09:34:14 +0200
>> From: Andreas Röhler<andreas.roehler@easy-emacs.de>
>>
>> the Python module SymPy displays math formulas. Running in a
>> bash-terminal at Xubuntu that works nicely.
>>   From Emacs however, the spaces in the upper line are wider than the
>> chars below.
>>
>> See attached sympy.png.
> I think that's because the · character (or something similar) used to
> depict the multiplication comes from another font, one that is not
> fixed-pitch and/or whose width is different from that of the default
> font.  The spaces are not the cause of this, they come from the
> default font and are always of the same width.
>
Okay, thanks, solved it by installing a truly monospaced font.

Re: SymPy from inside Emacs

[Leo Butler]

On Fri, May 13 2022, Andreas Röhler <andreas.roehler@easy-emacs.de> wrote:

> Am 13.05.22 um 09:47 schrieb Eli Zaretskii:
>>> Date: Fri, 13 May 2022 09:34:14 +0200
>>> From: Andreas Röhler<andreas.roehler@easy-emacs.de>
>>>
>>> the Python module SymPy displays math formulas. Running in a
>>> bash-terminal at Xubuntu that works nicely.
>>>   From Emacs however, the spaces in the upper line are wider than the
>>> chars below.
>>>
>>> See attached sympy.png.
>> I think that's because the · character (or something similar) used to
>> depict the multiplication comes from another font, one that is not
>> fixed-pitch and/or whose width is different from that of the default
>> font.  The spaces are not the cause of this, they come from the
>> default font and are always of the same width.
>>
> Okay, thanks, solved it by installing a truly monospaced font.

Andreas, an alternative solution would be to define a filter function
that filters the sympy output before insertion into the comint buffer.
You could replace the offending characters with better behaved ones
without changing font.

C-h f comint-preoutput-filter-functions

Leo

Re: SymPy from inside Emacs

[Andreas Röhler]

Am 13.05.22 um 16:18 schrieb Leo Butler:
> On Fri, May 13 2022, Andreas Röhler<andreas.roehler@easy-emacs.de>  wrote:
>
>> Am 13.05.22 um 09:47 schrieb Eli Zaretskii:
>>>> Date: Fri, 13 May 2022 09:34:14 +0200
>>>> From: Andreas Röhler<andreas.roehler@easy-emacs.de>
>>>>
>>>> the Python module SymPy displays math formulas. Running in a
>>>> bash-terminal at Xubuntu that works nicely.
>>>>    From Emacs however, the spaces in the upper line are wider than the
>>>> chars below.
>>>>
>>>> See attached sympy.png.
>>> I think that's because the · character (or something similar) used to
>>> depict the multiplication comes from another font, one that is not
>>> fixed-pitch and/or whose width is different from that of the default
>>> font.  The spaces are not the cause of this, they come from the
>>> default font and are always of the same width.
>>>
>> Okay, thanks, solved it by installing a truly monospaced font.
> Andreas, an alternative solution would be to define a filter function
> that filters the sympy output before insertion into the comint buffer.
> You could replace the offending characters with better behaved ones
> without changing font.
>
> C-h f comint-preoutput-filter-functions
>
> Leo


Thanks for the hint.

Andreas

Re: SymPy from inside Emacs

[Daniel Fleischer]

Andreas Röhler [2022-05-13 Fri 09:34] wrote:

> the Python module SymPy displays math formulas. Running in a bash-terminal at Xubuntu that works nicely.
> From Emacs however, the spaces in the upper line are wider than the chars below.

Maybe you'll be interested in

https://github.com/astoff/comint-mime

It works nicely. 

-- 

Daniel Fleischer