For example, I've got this data frame.

```
 import pandas as pd
 import numpy as np
 data = {'state': ['Ohio', 'Florida', 'Texas', 'Washington', 'Arizona', 'Nevada'],
         'year' : [2000, 2000, 2000, 2000, 2000, 2000],
         'event': [1.5, "None", 3.6, 2.4, "None", 3.2]}

frame = pd.DataFrame(data)
frame

```

**OUT>>**

```
    state       year    event
0   Ohio        2000    1.5
1   Florida     2000    None
2   Texas       2000    3.6
3   Washington  2000    2.4
4   Arizona     2000    None
5   Nevada      2000    3.2

```

Question/ How to filter the event column by display the DataFrame with only the float type based on the event column?

Looking the result to be like

```
   state        year    event
0   Ohio        2000    1.5
1   Texas       2000    3.6
2   Washington  2000    2.4
3   Nevada      2000    3.2

```