EXCEPTION: cannot import name EvalFormatter

[masp]

Since a recent calibre update one of my custom columns is suddenly broken and is displaying:

EXCEPTION: cannot import name EvalFormatter

for all books. It's a "column built from other columns" using this template:

{tags:'in_list($, ",",
   "^topic:",                 re_group($, ".* ?topic:([^,]+).*", "[[$]]"),
   ".* ?technical \(",      re_group($, ".* ?technical \((.+?)\).*", "[[$]]"),
   ".* ?technical$",        "",
                                   "")'}

I don't know which update broke it, but I last noticed it working a few months ago. I have other columns "built from other columns" which do still work, for instance one using this template:

{:'list_re(author_links(":", " & "), " & ", ".*?([^:]+):?$", "\1")'}

so it's something to do with the specific template that seems to be suddenly causing a problem.

Any help greatly appreciated!

Mike

[masp]

FWIW the broken column is the only custom column that uses re_group().

[kovidgoyal]

This will be fixed in the next release.

[masp]

Thanks!

[LiLYoda]

Same issue here. I have a columns called "Author Inverted" which lists the author name as "firstname lastname", whereas I have everything regitsred as "lastname, firstname" in the library

Here's the formula in the custom column

{authors:'list_re_group($, ' & ', '.', "(^.*\, .*$)|(^.*$)", "[[$:'re($, '^([^,]+), ([^[]+)', '\2 \1')']]", "[[$]]")'}

Problem is that it beaks the export to my Kobo, now all the authors on the books are now named "TEMPLATE ERROR cannot import name EvalFormatter"

[kovidgoyal]

Either downgrade calibre or wait for the next release which has the fix.

[LiLYoda]

Thanks
Do you have a rough ETA on the next version? If it's a matter of days, i'll wait, but if over a month, then I'd downgrade.

[kovidgoyal]

https://www.mobileread.com/forums/sh...d.php?t=322850

[LiLYoda]

OK. Downgraded to 3.47.1 on MacOS, and the bug disappeared.