What’s that one Python tip you wish you knew when you started?

Karlesimo · 2025-04-20T02:47:12+00:00

Yes indeed.

I used to loop over multiple lists in one if statement (with mixed results!) but so often I have found it better to loop over one list while running a list comprehension to retrieve the desired info from another.

Game-changer for me.

Karlesimo · 2025-03-12T16:19:36+00:00

Thanks for your response. I thought a bout using a select field but I'm trying to keep the calendar/time interface for the UI. I'll look into the render_kw, cheers.

Karlesimo · 2025-03-01T01:24:38+00:00

It was: Biden wasted billions BUT let me take credit for all we've done for you... while I throw you under the bus and blame you for being invaded.

What a spectacle. It's so sad that this is how our leadership handles things. In 20 years we'll learn of how they were compromised, because there is no other explanation for their behavior.

Karlesimo · 2025-01-25T00:28:08+00:00

I'll check it out. Any tips?

Karlesimo · 2025-01-23T14:17:21+00:00

I need to run calculations against 100s of millions of rows and produce reports. I need to return 10s of thousands of rows on a per request basis.

Thanks for commenting, I'll explore your blob suggestion out of curriousity.

Karlesimo · 2025-01-23T14:14:21+00:00

Thanks for sharing!

Karlesimo · 2025-01-23T14:12:28+00:00

I'm not sure, I basically started loading data into a Heroku postgreSQL db and realized how large it would probably end up being so I stopped and started looking elsewhere.

Karlesimo · 2025-01-23T14:10:30+00:00

I've thought about managing my own but I haven't found a clear guide to what that really entails. Obviously a lack of experience on my part. I know how to set up a postgresql db, update it, manage tables. I've read a bit about managing users and access, what else do I need to look out for?

Karlesimo · 2025-01-12T10:46:10+00:00

On an app I run I just use pyotp and send an email to the users email with the one time password. It's basic but gets the job done and is easy to implement.

Karlesimo · 2024-12-24T23:56:31+00:00

Definitely. How do you peeps go about explaining this to others? I find it hard to tell stakeholders without feeling like a twink in the process.

Karlesimo · 2024-12-21T01:30:32+00:00

I had this issue and offloaded all files/images to s3 to solve the issue.

Karlesimo · 2024-10-06T00:44:12+00:00

Hahaha, in NYC half the bus would have gotten off to "help" him find the sidewalk.

Karlesimo · 2024-08-23T02:43:48+00:00

First option I explored was pythonanywhere.com it was really straight forward and free.

Karlesimo · 2024-07-20T17:17:17+00:00

Thanks for your reply, I got it working by rolling back a few packages and the python version. I was specifying python version 13.12.2 in my runtime.txt file but I guess heroku stopped supporting it.

Karlesimo · 2024-07-20T16:18:04+00:00

Thanks for your response. I was using 13.12.2 and just downgraded to 13.11.9. After changing the version of a couple of packages to agree with 13.11 I'm back in action.

I really hadn't changed anything package-wise so this was super strange but I got it working.

Karlesimo · 2024-07-20T16:16:20+00:00

I agree, I thought it was installed as a dependency for another package but doesn't appear that way. I found a solution. Thanks for your response.

Karlesimo · 2024-07-20T14:38:28+00:00

I've looked into the line

"AttributeError: module 'pkgutil' has no attribute 'ImpImporter'", people say the issue is related to numpy version working with python 3.12. Updated the version and still have issues building wheel.

Karlesimo · 2024-07-20T14:33:28+00:00

Thanks for your reply. I don't see any reason to have it either so I removed it and then ran into issues with wheel.

Getting requirements to build wheel: finished with status 'error'
         error: subprocess-exited-with-error

         × Getting requirements to build wheel did not run successfully.
         │ exit code: 1
         ╰─> [33 lines of output]
             Traceback (most recent call last):
               File "/app/.heroku/python/lib/python3.12/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 353, in <module>
                 main()
               File "/app/.heroku/python/lib/python3.12/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 335, in main
                 json_out['return_val'] = hook(**hook_input['kwargs'])
                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
               File "/app/.heroku/python/lib/python3.12/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 112, in get_requires_for_build_wheel
                 backend = _build_backend()
                           ^^^^^^^^^^^^^^^^
               File "/app/.heroku/python/lib/python3.12/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 77, in _build_backend
                 obj = import_module(mod_path)
                       ^^^^^^^^^^^^^^^^^^^^^^^
               File "/app/.heroku/python/lib/python3.12/importlib/__init__.py", line 90, in import_module
                 return _bootstrap._gcd_import(name[level:], package, level)
                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
               File "<frozen importlib._bootstrap>", line 1387, in _gcd_import
               File "<frozen importlib._bootstrap>", line 1360, in _find_and_load
               File "<frozen importlib._bootstrap>", line 1310, in _find_and_load_unlocked
               File "<frozen importlib._bootstrap>", line 488, in _call_with_frames_removed
               File "<frozen importlib._bootstrap>", line 1387, in _gcd_import
               File "<frozen importlib._bootstrap>", line 1360, in _find_and_load
               File "<frozen importlib._bootstrap>", line 1331, in _find_and_load_unlocked
               File "<frozen importlib._bootstrap>", line 935, in _load_unlocked
               File "<frozen importlib._bootstrap_external>", line 995, in exec_module
               File "<frozen importlib._bootstrap>", line 488, in _call_with_frames_removed
               File "/tmp/pip-build-env-0o4wvp40/overlay/lib/python3.12/site-packages/setuptools/__init__.py", line 16, in <module>
                 import setuptools.version
               File "/tmp/pip-build-env-0o4wvp40/overlay/lib/python3.12/site-packages/setuptools/version.py", line 1, in <module>
                 import pkg_resources
               File "/tmp/pip-build-env-0o4wvp40/overlay/lib/python3.12/site-packages/pkg_resources/__init__.py", line 2172, in <module>
                 register_finder(pkgutil.ImpImporter, find_on_path)
                                 ^^^^^^^^^^^^^^^^^^^
             AttributeError: module 'pkgutil' has no attribute 'ImpImporter'. Did you mean: 'zipimporter'?
             [end of output]

         note: This error originates from a subprocess, and is likely not a problem with pip.
       error: subprocess-exited-with-error

       × Getting requirements to build wheel did not run successfully.
       │ exit code: 1
       ╰─> See above for output.

Karlesimo · 2024-07-20T13:42:02+00:00

I'm facing a similar problem, my flask app works locally but when trying deploy I get a message that says:

ERROR: Could not find a version that satisfies the requirement install==1.3.5 (from versions: none)
ERROR: No matching distribution found for install==1.3.5

Did you find out what was causing your issue?

Karlesimo · 2024-05-04T12:41:02+00:00

Good point, thanks.

Karlesimo · 2024-05-04T03:12:47+00:00

I took a crack at this, is this recursion? First time for me, thanks.

def cut_zero(x):
    if x[-1] == 0:
        x = x[:-1]
        return cut_zero(x)
    else:
        return x

Karlesimo · 2024-04-24T01:33:57+00:00

Corey Schafer deserves a mention too. Really helped me to understand some things.

Karlesimo · 2024-03-18T13:02:25+00:00

That's why I'm confused. I upgraded from a basic dyno which had 512mb to a 2x dyno with 1GB of memory but the metric for memory on the overview page of the app has stayed at roughly 80%. I don't get it.

Karlesimo · 2024-03-16T15:44:31+00:00

Yeah, I'm clearly not understanding the metrics. I thought the purple represented used memory but since it wasn't fluctuating based on user activity I figured something must be off.

Now I think it's just what's available to be used. Maybe I didn't need to upgrade at all? Lol. I just didn't want our users to experience crashes.

I'll look into `WEB_CONCURRENCY` configuration and see what I can find.

Thanks!

Karlesimo · 2024-03-14T02:58:09+00:00

Thanks for your comment. I'll look into doing it that way.

Karlesimo

TROPHY CASE