Alternatively, the modules can be imported by the command import. This creates a namespace named after the filename. The command from puts the functions into the general namespace without creating a separate namespace:

import smartfunctions
print(smartfunctions.f(2))      # 5

from smartfunctions import g    #import just this function
print(g(1)) # 0
  
from smartfunctions import *    #import all
print(h(2)*f(2))                # 1.0

Import the commands import and from. Import the functions only once into the respective namespace. Changing the functions after the import has no effect on the current Python session.