ValueError: dictionary update sequence element #0 has length 1; 2 is required

[juanbiondi]

It falls with the excption above when the parse is used.

from pattern.es import parsetree
parsetree("buena", lemmata=True)

[delchiaro]

This repo seems abandoned since 2015..
Use this branch of official pattern library: https://github.com/clips/pattern/tree/python3