Can I update token's POS tag?

[lingvisa]

For some critical POS errors, I want to be able to correct by myself through a dictionary or rules. For dictionary, it could be as simple as:

dog NN

Then I can do:

token.pos_ = 'NN'

How hard to support such a feature? For serious uses of POS info, this would be very useful!

[adrianeboyd]

token.pos_ is restricted to UPOS tags, so you could do NOUN but not NN. If you want to use any arbitrary tag like NN, use the attribute token.tag_ instead.

[lingvisa]

That's good enough. I vaguely remember spacy token attributes are immutable. Not really, which is good.

[adrianeboyd]

Not immutable, just restricted to the UPOS tag set (plus a few custom whitespace-related tags). See the internal list here: https://github.com/explosion/spaCy/blob/27a1cd3c630055802513a20c1e75d0b37943cc39/spacy/parts_of_speech.pxd