Calling "def" functions from another file.

[Terry Reedy]

frankrentef wrote:
> Newbie here....
> 
> I'm writing a Python program that has "def" functionality growing in
> leaps and bounds.  I'm a newbie to Python so be detailed.  Is there a
> way to create a py file with all the "def's" listed and just call them
> from the "program" py file?  How would I do this?  Say my "def" py
> file was named def.py and the program file was named "program.py"

This is what all the modules in the standard library are about.

func.py (in same directory as prog.py or in sys.path directory
----------------
def a(b,c):
   return b*c-(b+c)//2

prog.py
------------------
import func
print(func.a(2,4)) #3.0

# should print 5