Filtering a list

[powerfulsaber]

How can I filter a list? For example, with a basic string, I can do this:

--filter "contains(title.lower(), 'test')"

How can I do something similar with a list, like tags?

[mikf]

contains() works for lists as well (although it can't .lower() the elements first)

--filter "contains(tags, 'test')"

[mikf]

Alternatively, this can be done with

--filter 'any(t.lower() in ("foo", "bar") for t in tags)'

but this doesn't work in older Python versions, which was the primary reason contains() got added.

[powerfulsaber]

Ah, I did test that but accidentally used the wrong link. Thank you. And glad to know about the alternative, though I've noticed tags are lowered beforehand, so contains() would be sufficient in this case.

[powerfulsaber]

Is there a page that documents all the methods available for filtering?

[mikf]

https://docs.python.org/3/library/functions.html
https://gdl-org.github.io/docs/configuration.html#globals

gallery-dl/gallery_dl/util.py

Lines 778 to 795 in cbf930c

	GLOBALS = {
	"contains" : contains,
	"parse_int": text.parse_int,
	"urlsplit" : urllib.parse.urlsplit,
	"datetime" : datetime.datetime,
	"timedelta": datetime.timedelta,
	"abort" : raises(exception.StopExtraction),
	"error" : raises(exception.AbortExtraction),
	"terminate": raises(exception.TerminateExtraction),
	"restart" : raises(exception.RestartExtraction),
	"hash_sha1": sha1,
	"hash_md5" : md5,
	"std" : ModuleProxy(),
	"re" : text.re_module,
	"exts_image" : EXTS_IMAGE,
	"exts_video" : EXTS_VIDEO,
	"exts_archive": EXTS_ARCHIVE,
	}