ClipsPy empty Error

[angel-langdon]

I am new to CLIPS and to clipsPy. I am trying to create a instance of a CLIPS class

This is the class I have defined and correctly build in my python environment (clipsPy)

ENTITIES_CLASS = """
(defclass ENTITY-CLASS (is-a INITIAL-OBJECT)
    (slot text (type STRING))
    (slot confidence (type FLOAT))
    (slot type (type SYMBOL))
)
"""
env.build(ENTITIES_CLASS)

This works as expected, but when I try to create an instance of this class:

new_instance = "(ent0-0 of ENTITY-CLASS (text 'Bruce Springsteen')(confidence 1.0)(type PER))"
env.make_instance( new_instance )

I get this empty error:

https://i.stack.imgur.com/rLTZY.png

I have tried multiple forms of building the new_instance string but none have work :

new_instance = '(ent0-0 of ENTITY-CLASS (text "Bruce Springsteen")(confidence 1.0)(type PER))'
new_instance = "(ent0-0 of ENTITY-CLASS (text 'Bruce Springsteen') (confidence 1.0) (type PER) )"

Where is my syntax error? I appreciate any help

[angel-langdon]

I restarted Jupyter Notebook and used double quotes for large strings with spaces and it worked:
new_instance = '(ent0-0 of ENTITY-CLASS (text "Bruce Springsteen")(confidence 1.0)(type PER))'

[noxdafox]

Issue discussed in this StackOverflow question.