Unknown format code 'f' for object of type 'str'- Folium

Question

I have a dataframe that looks like below

    Number  Names   latitude    longitude
0   1       Josh    25.713277   80.746531
1   2       Jon     25.713277   80.746531
2   3       Adam    25.713277   80.746531
3   4       Barsa   25.713277   80.746531
4   5       Fekse   25.713277   80.746531
5   6       Bravo   25.713277   80.746531
6   7       Levine  25.713277   80.746531
7   8       Talyo   25.713277   80.746531
8   9       Syden   25.713277   80.746531
9   10      Zidane  25.713277   80.746531

I am trying to create a folium map for this dataframe, I wanted the Number column values to be displayed in some color based on the values of Names column with the following code, basically I want the number 1 to 10 to be displayed in some color for a place based on the Names. For example, 1 should be displayed in lightblue, 2 should be displayed in green color and rest of the numbers should be displayed in red color

for Number,Names,latitude,longitude in zip(dsa['Number'],dsa['Names'],dsa['latitude'],dsa['longitude']):
    folium.Marker(location=[latitude,longitude],
                  icon=folium.DivIcon(
                      html=f"""<div style="font-family: courier new; color: {'lightblue' if Names == 'Josh' else 'green' if Names == 'Jon' else 'red'}">{"{:.0f}".format(Number)}</div>""")
                  ).add_to(m)
m.save(os.path.join('color_popups1231.html'))

But when I execute this I am getting this error:

ValueError: Unknown format code 'f' for object of type 'str'

What am I missing here?

Answer 1

The f format code in "{:.0f}".format(Number) for the Python string formatter requires a floating number, and yet you're passing to it the variable Number, which is derived from dsa['Number'], a string value from the dataframe. You should convert Number to a floating number before passing it to the formatter with "{:.0f}".format(float(Number)) instead.