Possible to "compress" stretched images?

[Leonatus]

I subscribe to the "Tagespost" magazine, whose recipe Pat Stapleton kindly created for me. It is as follows:

#!/usr/bin/env python
# vim:fileencoding=utf-8
from __future__ import unicode_literals, division, absolute_import, print_function
__license__ = 'GPL v3'
__copyright__ = '2020, Pat Stapleton <pat.stapleton at gmail.com>'
'''
Recipe for Die Tagespost
'''
from calibre.web.feeds.news import BasicNewsRecipe


class AdvancedUserRecipe1589629735(BasicNewsRecipe):
    title          = 'Tagespost'
    language       = 'de'
    __author__     = 'Pat Stapleton'
    description = ('Die Tagespost trägt den Untertitel Katholische Wochenzeitung für Politik, Gesellschaft'
        ' und Kultur und ist eine überregionale, wöchentlich im Johann Wilhelm Naumann Verlag in Würzburg erscheinende Zeitung.')
    oldest_article = 7
    max_articles_per_feed = 100
    keep_only_tags = [
        dict(name='article', attrs={'class':'art-detail'})
    ]
    use_embedded_content = False
   

    feeds          = [
        ('Tagespost', 'https://www.die-tagespost.de/storage/rss/rss/die-tagespost-komplett.xml'),
    ]
    extra_css = 'td.textb {font-size: medium;} * { text-align: justify !important; text-decoration: none !important}'
    remove_attributes = ['href']

calibre_most_common_ua = 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.87 Safari/537.36'

I am very pleased because - unlike a previous recipe - images are also downloaded. These images naturally vary in size, but what they have in common is that they are regularly overstretched vertically. My question: Is it possible to "compress" them slightly (e.g. 25%)? A completely proportional adjustment is probably not possible.

[unkn0wn]

https://github.com/kovidgoyal/calibr...a54f067cdef268

[Leonatus]

Thank you so far! But trying to copy/paste the recipe into "edit recipe", I get the following error:

calibre, version 8.8.0
FEHLER: Ungültiges Schema: Failed to compile the recipe, with syntax error: '[' was never closed (<string>, line 67)

As I'm not familiar to this, I'd rather not endeavour to change something on my own account. Could you, please, help me once more?
By the way, and in order to learn something by myself: Which are the lines that manipulate the images?

[PeterT]

Once Kovid merges this update into Calibre, the recipe will be automagically downloaded the next time you use it.

[unkn0wn]

Originally Posted by Leonatus

Thank you so far! But trying to copy/paste the recipe into "edit recipe"

no more edits, just use the built in recipe for tagespost,

[Leonatus]

Incredible! Marvellous! It works greately! Many thanks!