MobileRead Forums - View Single Post - Receipe with raw string literal fails in calibre 3.44

siebert · 06-02-2019, 07:13 AM

Hi,

after the update from 3.39.1 to 3.44 I noticed that one of my recipes failed to load.

The reason is that the recipe contains a windows path stored as a raw string literal, e.g. r"C:\Users\foo\Dropbox"

I can work around the bug by using "C:\\Users\\foo\\Dropbox" instead, but as this is a regression I think it should be fixed in Calibre instead.

Here is a small bogus recipe which shows this issue when loaded in Calibre 3.44 (32bit Windows version):

Code:

from calibre.web.feeds.news import AutomaticNewsRecipe


OUPUT_PATH = r"C:\Users\foo\Dropbox"

class BasicUserRecipe(AutomaticNewsRecipe):
    title = u'Test based on Planet Python'
    language = 'en'
    __author__ = 'Jelle van der Waa'
    oldest_article = 10
    max_articles_per_feed = 100
    feeds = [(u'Planet Python', u'http://planetpython.org/rss20.xml')]

The error reported by Calibre is:

Code:

calibre, version 3.44.0
ERROR: Invalid recipe: Failed to compile the recipe, with syntax error: (unicode error) 'rawunicodeescape' codec can't decode bytes in position 2-3: truncated \uXXXX (<string>, line 4)

06-02-2019, 07:13 AM	#1
siebert Developer Posts: 155 Karma: 280 Join Date: Nov 2010 Device: Kindle 3 (Keyboard) 3G / iPad 9 WiFi / Google Pixel 6a (Android)	Receipe with raw string literal fails in calibre 3.44 Hi, after the update from 3.39.1 to 3.44 I noticed that one of my recipes failed to load. The reason is that the recipe contains a windows path stored as a raw string literal, e.g. r"C:\Users\foo\Dropbox" I can work around the bug by using "C:\\Users\\foo\\Dropbox" instead, but as this is a regression I think it should be fixed in Calibre instead. Here is a small bogus recipe which shows this issue when loaded in Calibre 3.44 (32bit Windows version): Code: from calibre.web.feeds.news import AutomaticNewsRecipe OUPUT_PATH = r"C:\Users\foo\Dropbox" class BasicUserRecipe(AutomaticNewsRecipe): title = u'Test based on Planet Python' language = 'en' __author__ = 'Jelle van der Waa' oldest_article = 10 max_articles_per_feed = 100 feeds = [(u'Planet Python', u'http://planetpython.org/rss20.xml')] The error reported by Calibre is: Code: calibre, version 3.44.0 ERROR: Invalid recipe: Failed to compile the recipe, with syntax error: (unicode error) 'rawunicodeescape' codec can't decode bytes in position 2-3: truncated \uXXXX (<string>, line 4)