---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
Cell In[12], line 1
----> 1 lightning_type = ln.Feature(name="__Lamindb_lightning__", is_type=True).save()

File ~/code/lamindb/lamindb/models/feature.py:1072, in __init__(self, *args, **kwargs)
   1060 """Rank of feature.
   1061 
   1062 Number of indices of the array: 0 for scalar, 1 for vector, 2 for matrix.
   (...)   1065 the dimension of the feature space.
   1066 """
   1067 array_size: int = models.IntegerField(default=0, db_index=True)
   1068 """Number of elements of the feature.
   1069 
   1070 Total number of elements (product of shape components) of the array.
   1071 
-> 1072 - A number or string (a scalar): 1 or `None`
   1073 - A 50-dimensional embedding: 50
   1074 - A 25 x 25 image: 625
   1075 """
   1076 array_shape: list[int] | None = JSONField(default=None, db_default=None, null=True)
   1077 """Shape of the feature.
   1078 
   1079 - A number or string (a scalar): [1] or `None`
   (...)   1083 Is stored as a list rather than a tuple because it's serialized as JSON.
   1084 """

File ~/code/lamindb/lamindb/models/sqlrecord.py:954, in __init__(self, *args, **kwargs)
    950 if "space_id" in kwargs:
    951     # space_id takes precedence over space
    952     # https://claude.ai/share/f045e5dc-0143-4bc5-b8a4-38309229f75e
    953     if kwargs["space_id"] == 1:  # ignore default space
--> 954         kwargs.pop("space_id")
    955         kwargs["space"] = current_space
    956 elif "space" in kwargs:

File ~/code/lamindb/lamindb/models/sqlrecord.py:374, in validate_fields(record, kwargs)
    362 from lamindb.models import (
    363     Artifact,
    364     Collection,
   (...)    369     ULabel,
    370 )
    372 # validate required fields
    373 # a "required field" is a Django field that has `null=False, default=None`
--> 374 required_fields = {
    375     k.name for k in record._meta.fields if not k.null and k.default is None
    376 }
    377 required_fields_not_passed = {k: None for k in required_fields if k not in kwargs}
    378 kwargs.update(required_fields_not_passed)

File ~/code/lamindb/lamindb/models/sqlrecord.py:240, in is_approx_pascal_case(s)
    238     fields_part = error_msg.split("Key (")[1].split(")=")[0]
    239     fields = [f.strip() for f in fields_part.split(",")]
--> 240     return fields
    242 # Fallback if DETAIL line not available
    243 return [field_string]

ValueError: '__Lamindb_lightning__' should start with a capital letter given you're defining a type