[python] AttributeError: 'Series' object has no attribute 'find'

Situation

The above error occurs when trying to plot the data stored in the DataFrame of pandas.

Cause

The data type was object. The content of the data is a numerical value, but probably because of the way of writing in the csv file, it was an object type when it was read into the DataFrame. Let's check first ...

Solution

You can check the data type in DataFrame.dtypes.

x=np.random.randint(0, 3, 100)
y=[str(i) for i in x]
df=pd.DataFrame({'x': x, 'y':y})
df.dtypes

x     int32
y    object
dtype: object

Data type conversion can be done with the astype () method.

df['y']=df['y'].astype('int')
df['y'].dtype

dtype('int32')