python using anaconda jupyter notebook

[fernandotoscano]

I´m using anaconda's jupyter notebook and I got an error like this:

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/usr/local/lib/python3.10/dist-packages/pandas/core/series.py in array(self, dtype)
891 array(['1999-12-31T23:00:00.000000000', ...],
892 dtype='datetime64[ns]')"""
--> 893 return np.asarray(self._values, dtype)
894
895 # ----------------------------------------------------------------------

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

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I´m trying to learn in a Project named: Breast Cancer Detection Using Python & Machine Learning (youtube)

And when I try to run the code :

Visualize the count

sns.countplot(df['diagnosis'], label= 'count')

I received the error message above.

In the column 'diagnoses' I only have "M" for malignant and "B" benign.

Can some one help me please.
Thank You

[xiazhengtao]

what is this