i have tried to solve this but couldn’t solve it, like i also cahnge the datatype of column enginetype that were having ohc in their rows but changing that datatype to float didn’t work for me. please help me to solve this error.

ValueError                                Traceback (most recent call last)
<ipython-input-28-a48ec3de5487> in <cell line: 2>()
      1 lr= LinearRegression()
----> 2 lr.fit(X_train,y_train)
      3 
      4 rf= RandomForestRegressor()
      5 rf.fit(X_train,y_train)

5 frames
/usr/local/lib/python3.10/dist-packages/pandas/core/generic.py in __array__(self, dtype)
   1996     def __array__(self, dtype: npt.DTypeLike | None = None) -> np.ndarray:
   1997         values = self._values
-> 1998         arr = np.asarray(values, dtype=dtype)
   1999         if (
   2000             astype_is_view(values.dtype, arr.dtype)

ValueError: could not convert string to float: 'ohc'