howto create a reasonable library of subroutines

[purgatoryred]

Please forgive my ignorance but forever I've been in the habit of building a library of useful subroutines which I call from an application I am building.

Recently the language has been python - a distinct departure from my experience. I've been unable to create a reasonable library. Here's the tree (an example)

mkfs a directory
subs a directory in which I keep my subroutines
__init__.py a file I got from DiveIntoPython
file1.py contains subroutine sub1
file2.py contains subroutine sub2
app.py needs to call sub1 and sub2

The only way I can make this work is
in __init__.py to import file1 and file 2 and
in app to import sub1 from subs and
when I want to call sub1, I have to subs.file1.sub1()

Surely there must be a better way. Perhaps a Pythonic way that has escaped me so far?

Help, please?

Purgatoryred, whose education is composed largely of assembly language where the forgoing would have been trivial.

[Gribouillis]

You could put this in __init__.py

# __init__.py
def _load():
    from glob import glob
    from os.path import join, dirname, splitext, basename

    for path in glob(join(dirname(__file__),'[!_]*.py')):
        name = splitext(basename(path))[0]
        exec "from %s import *" % name in globals()
_load()

Note that all the submodules will be loaded when you load subs. Also you should put a __all__ variable in your submodules to import only the names you need. For example

# file1.py
__all__ = ["useful_function",] # list of functions to export

def useful_function():
    pass

def helper_function(): # not in __all__ --> not exported
    pass

Also, a simpler solution is to write

# app.py
from subs.file1 import func1
func1()

With the above code, you can write

# app.py
from subs import func1
func1()

[purgatoryred]

Should have told you, I'm using python3. Had to change a few things. No sweat. But I could not figure out what you intended with "name in globals()" in the exec statement.

Tried to wire some stuff just to see if I could get anything to work. Not much luck. I'll continue on Monday.

Still, I thank you for your thoughtful reply.

[purgatoryred]

Solved. In the end the trouble evolved from the dichotomy between decades of assembly language and this new, much higher level, stuff.

Tks for the assistance.

Purgatoryred