Is it possible to load a module/class once and not every time osxphotos query processes a photo

[oPromessa]

Issue

I'm running python function on osxphotos query which loads a class which takes some time. But the info loaded is static and does not need to be loaded once for each photo being processed by osxphotos query.

 osxphotos query --field "timezone-info-name-dst"  "{function:tzname.py::tzname_utcoffset}"

and tzname_utcoffset runs:

from timezonefinder import TimezoneFinder
import pytz
(...)
# Find the timezone based on latitude and longitude
tf = TimezoneFinder() # takes some time to load.
(...)

Question

Is there a way to preload the class once only and provide access to it when handling each photo. Thus hugely increasing performance.

Alternative

• I could build a program based on the examples and use "import osxphotos"... etc. But was wondering if one could do it integrated with osxphotos query (...)

[RhetTbull]

This is something we might possibly be able to implement -- would need to think about it. Might be tricky to ensure things are injected into the right namespace, etc. However, here's a workaround that uses standard python behavior. In python, modules are only imported a single time. Any subsequent call to import uses the cached module. Thus, you could do this:

Create a new file named tf.py (or whatever you want) and in that file you do the slow class creation:

from timezonefinder import TimezoneFinder
import pytz
(...)
# Find the timezone based on latitude and longitude
tf = TimezoneFinder() # takes some time to load.
(...)

Then in your tzname.py, you import from this module:

from tf import tf

# use tf here in your template function

This results in one extra file you need to keep track of but it solves the problem because the code in the import tf will only be run one time.

Edit: as long as both files are in the same directory, this should work.

[oPromessa]

For now I've took the examples/cli_example_1.py file and adapted it. Runs like a breeze!
IT's also super the fact that it takes all que query arguments: --selected, etc...

Will test out your recommendation when I have some time.

Thanks again for the support!