Searching in JAMS with `None` and `str` values

I’m getting a TypeError when searching annotations within a JAMS file that contain a specific key that can either be a string or a None.

Here an example:

when I do something this: jam.search(namespace="segment_open").search(**{"Sandbox.boundaries_id": "sf"})

and some annotations inside jam have boundaries_id=None and others have boundaries_id="sf", the search method raises a TypeError, like this:

/home/uri/anaconda3/lib/python3.6/site-packages/jams/core.py in search(self, **kwargs)
   1340 
   1341         for annotation in self:
-> 1342             if annotation.search(**kwargs):
   1343                 results.append(annotation)
   1344 

/home/uri/anaconda3/lib/python3.6/site-packages/jams/core.py in search(self, **kwargs)
    449 
    450                 if isinstance(obj, JObject):
--> 451                     match |= obj.search(**r_query)
    452 
    453         return match

/home/uri/anaconda3/lib/python3.6/site-packages/jams/core.py in search(self, **kwargs)
    442         for key in r_query:
    443             if hasattr(self, key):
--> 444                 match |= match_query(getattr(self, key), r_query[key])
    445 
    446         if not match:

/home/uri/anaconda3/lib/python3.6/site-packages/jams/core.py in match_query(string, query)
   1836 
   1837     elif isinstance(query, six.string_types):
-> 1838         return re.match(query, string) is not None
   1839 
   1840     else:

/home/uri/anaconda3/lib/python3.6/re.py in match(pattern, string, flags)
    170     """Try to apply the pattern at the start of the string, returning
    171     a match object, or None if no match was found."""
--> 172     return _compile(pattern, flags).match(string)
    173 
    174 def fullmatch(pattern, string, flags=0):

TypeError: expected string or bytes-like object

Is there a way to circumvent this? Shouldn’t search allow for this type of searches? Thanks!

[urinieto]

I think you missed a is not None in your work around. This seems to work now:

J.search(**{'Sandbox.foo': lambda x: isinstance(x, six.string_types) and re.match('bar', x) is not None})

[bmcfee]

I think you missed a is not None in your work around.

Yeah, sorry about that – you’re right.