Apply suggestions from code review

Co-authored-by: Dilan Pathirana <[email protected]>

Author: dweindl

petab/v2/C.py

@@ -133,7 +133,7 @@
 OPERATION_TYPE = "operationType"
 #: Column in the condition table with the new value of the target entity
 TARGET_VALUE = "targetValue"
-# opeartion types:
+# operation types:
 OT_CUR_VAL = "setCurrentValue"
 OT_NO_CHANGE = "noChange"
 

petab/v2/core.py

@@ -144,7 +144,7 @@ def validate_id(cls, v):
         mode="before",
     )
     @classmethod
-    def convert_nan_to_none(cls, v, info: ValidationInfo):
+    def convert_nan_to_default(cls, v, info: ValidationInfo):
         if isinstance(v, float) and np.isnan(v):
             return cls.model_fields[info.field_name].default
         return v
@@ -177,7 +177,7 @@ def __getitem__(self, observable_id: str) -> Observable:
         raise KeyError(f"Observable ID {observable_id} not found")
 
     @classmethod
-    def from_dataframe(cls, df: pd.DataFrame) -> ObservablesTable:
+    def from_df(cls, df: pd.DataFrame) -> ObservablesTable:
         if df is None:
             return cls(observables=[])
 
@@ -188,7 +188,7 @@ def from_dataframe(cls, df: pd.DataFrame) -> ObservablesTable:
 
         return cls(observables=observables)
 
-    def to_dataframe(self) -> pd.DataFrame:
+    def to_df(self) -> pd.DataFrame:
         return pd.DataFrame(self.model_dump()["observables"])
 
     @classmethod