import folium as fo
map = fo.Map()
map
x = fo.FeatureGroup(name= 'My Map')
x.add_person(fo.Marker(location=[27.1750,78.0422] ,
popup='hello user' , icon=fo.Icon(color='green')))
map.add_person(x)
You don't have the python package installed. You can install it using pip running this command in your console:
python -m pip install folium
Take a look at Installing Python Modules on the python documentation