Python Forum

In the following code there is an error as shown:

# Set the data 
data = dax

# Extract the feature names and importance values
feature_names = range(0,51)
importances = data[0]

# Plot the data
plt.figure(figsize=(10, 5))
plt.title("Feature Importance")
plt.bar(feature_names, importances)
plt.xlabel("Sensor Index")
plt.ylabel("Importance")
plt.show()

The error is now shown:

Error:
KeyError                                  Traceback (most recent call last)
File ~\miniconda3\envs\pump-failure-pred\lib\site-packages\pandas\core\indexes\base.py:3621, in Index.get_loc(self, key, method, tolerance)
   3620 try:
-> 3621     return self._engine.get_loc(casted_key)
   3622 except KeyError as err:

File ~\miniconda3\envs\pump-failure-pred\lib\site-packages\pandas\_libs\index.pyx:136, in pandas._libs.index.IndexEngine.get_loc()

File ~\miniconda3\envs\pump-failure-pred\lib\site-packages\pandas\_libs\index.pyx:163, in pandas._libs.index.IndexEngine.get_loc()

File pandas\_libs\hashtable_class_helper.pxi:5198, in pandas._libs.hashtable.PyObjectHashTable.get_item()

File pandas\_libs\hashtable_class_helper.pxi:5206, in pandas._libs.hashtable.PyObjectHashTable.get_item()

KeyError: 0

The above exception was the direct cause of the following exception:

KeyError                                  Traceback (most recent call last)
Input In [45], in <cell line: 6>()
      4 # Extract the feature names and importance values
      5 feature_names = range(0,51)
----> 6 importances = data[0]
      8 # Plot the data
      9 plt.figure(figsize=(10, 5))

File ~\miniconda3\envs\pump-failure-pred\lib\site-packages\pandas\core\frame.py:3505, in DataFrame.__getitem__(self, key)
   3503 if self.columns.nlevels > 1:
   3504     return self._getitem_multilevel(key)
-> 3505 indexer = self.columns.get_loc(key)
   3506 if is_integer(indexer):
   3507     indexer = [indexer]

File ~\miniconda3\envs\pump-failure-pred\lib\site-packages\pandas\core\indexes\base.py:3623, in Index.get_loc(self, key, method, tolerance)
   3621     return self._engine.get_loc(casted_key)
   3622 except KeyError as err:
-> 3623     raise KeyError(key) from err
   3624 except TypeError:
   3625     # If we have a listlike key, _check_indexing_error will raise
   3626     #  InvalidIndexError. Otherwise we fall through and re-raise
   3627     #  the TypeError.
   3628     self._check_indexing_error(key)

KeyError: 0

I am trying to plot feature importances here. I must get the feature importances and their index be it 1, 2, or 3 , .... to plot. What is a key error?

That is my first question?

Respectfully,


Led_Zeppelin

data does not have [0]. What is dax? KeyError indicates it is a dictionary. What are the keys in the dictionary?