Resolved: Error message while creating the plot in python

Question

Hello there !

In python I have followed every single steps of course, however when I try to show the plot I get an error message.

I've typed :
plt.bar(x = df_used_cars["Brand"],
height = df_used_cars["Cars"])
plt.show()

And I get the following error :

KeyError                                  Traceback (most recent call last)
~/opt/anaconda3/lib/python3.8/site-packages/pandas/core/indexes/base.py in get_loc(self, key, method, tolerance)
   3079             try:
-> 3080                 return self._engine.get_loc(casted_key)
   3081             except KeyError as err:

pandas/_libs/index.pyx in pandas._libs.index.IndexEngine.get_loc()

pandas/_libs/index.pyx in pandas._libs.index.IndexEngine.get_loc()

pandas/_libs/hashtable_class_helper.pxi in pandas._libs.hashtable.PyObjectHashTable.get_item()

pandas/_libs/hashtable_class_helper.pxi in pandas._libs.hashtable.PyObjectHashTable.get_item()

KeyError: 'Cars'

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

KeyError                                  Traceback (most recent call last)
<ipython-input-35-d79bafa9e047> in <module>
      1 plt.bar(x = df_used_cars["Brand"],
----> 2         height = df_used_cars["Cars"])
      3 plt.show()

~/opt/anaconda3/lib/python3.8/site-packages/pandas/core/frame.py in __getitem__(self, key)
   3022             if self.columns.nlevels > 1:
   3023                 return self._getitem_multilevel(key)
-> 3024             indexer = self.columns.get_loc(key)
   3025             if is_integer(indexer):
   3026                 indexer = [indexer]

~/opt/anaconda3/lib/python3.8/site-packages/pandas/core/indexes/base.py in get_loc(self, key, method, tolerance)
   3080                 return self._engine.get_loc(casted_key)
   3081             except KeyError as err:
-> 3082                 raise KeyError(key) from err
   3083 
   3084         if tolerance is not None:

KeyError: 'Cars'

I've searched on the internet but I haven't found yet an answer to this problem.

Thanks in advance for your answers!

Answer 1

Hi Vincent,
thanks for reaching out and sorry to learn you've received a Python error!
The error concerns "Cars", which isn't actually a column in the data frame, the column name is "Cars Listing" and I believe that's why the issue occurs.
You can try the same code, you already have, just change the name of the column in question, like so:

plt.bar(x = df_used_cars["Brand"],
        height = df_used_cars["Cars Listings"])
plt.show()

Let me know if you're still having any difficulties!

Best,
365 Eli

Answer 2

Thanks for your quick answer !
You solved my problem, it was the wrong name :)

Resolved: Error message while creating the plot in python

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