TypeError: replace() argument 2 must be str, not None

[mariana200196]

I wanted to make you aware that at somepoint in the last 2-3 weeks, something related to the check() method in CheckerBase changed (?) and now check() requires is_joint to be set.

Previously, the following code would run fine:

batch_claims = [[['A woman', 'lingered before', 'the gate of a school'],
                    ['A woman', 'clung to', 'her umbrella and mobile phone'],
                    ... ]]]

batch_reference= ["A mysterious woman lingered before the school gates. ..."]

checking_results = checker.check(
    batch_claims=batch_claims,
    batch_references=batch_reference,
    max_reference_segment_length=0
)

Now it returns an error: TypeError: replace() argument 2 must be str, not None

The solution is to set is_joint

res = checker.check(
        batch_claims=batch_claims ,
        batch_references=[batch_reference],
        max_reference_segment_length=0,
        is_joint=False
    )

Perhaps you could update refchecker_usages.ipynb so others who are getting started with RefChecker, like me, don't run into the same issue.