wware

import types
import inspect
import pprint
from collections import defaultdict


def get_stack(offset=0):
    def frame2tuple(frame):
        info = inspect.getframeinfo(frame[0])
        return (info.filename, info.lineno)

wware

Python packaging info

I need to start educating myself about how Python packages work.

• http://www.ianbicking.org/docs/setuptools-presentation/ - slideshow about how to put together a package

Official docs:

• http://setuptools.readthedocs.io/en/latest/setuptools.html

wware

int count = 0;
void setup() { }
void loop() {
    int i;
    Keyboard.print("Hello World ");
    Keyboard.print(count);
    count = count + 1;
    delay(2000);
    for (i = 0; i < 20; i++) {
        Keyboard.print("\177");

wware

========== Converting a VirtualBox VDI image to a bootable USB stick to run on the Intel NUC

http://askubuntu.com/questions/556911/how-to-create-an-iso-image-from-vdi-file/#answer-816885

TEST THIS STUFF AND UPDATE THE ASKUBUNTU ANSWER IF NECESSARY. If the USB stick can be used with a second VM, add that to the answer.

Test this procedure using Damn Small Linux and make sure it works as expected. More thoughts about DSL on USB stick here.

wware

#!/usr/bin/env python

import os
import re
import time
import subprocess

os.system("ps ax | grep fluidsynth | cut -c -6 | xargs kill -9")

devnull = os.open('/dev/null', os.O_WRONLY)

wware

I need a reminder about how to set up a service in Linux that will run a script at boot time. Put this LSB init script in your /etc/init.d directory and then type

sudo update-rc.d linux_service.sh defaults

to set up the service. This is a wrapper for the script you actually want to run. The "Required-Start" section allows you to choose what Linux services need to be running before your own service is started. (I think my Fluidsynth script probably wants "alsasound".)

Some relevant links about this stuff:

wware

The Magic of SQLACodeGen

SQLACodeGen is a work of genius. Here is the command you use to generate the model classses for your database. Lately I'm working with MySQL, previously I was working with PostgreSQL.

sqlacodegen mysql://user:password@server/database > mymodels.py

Had I been aware of SQLACodeGen three months ago, I would have used SQLAlchemy for a project where instead I wrote a lot of raw SQL.

wware

#!/usr/bin/env python
# -*- coding: utf-8 -*-
import logging
import random
import os
from Crypto.Cipher import AES

def _make_binary(x):
    for c in list(x):
        assert c in '0123456789ABCDEFabcdef'

wware

Do this:

make
gdb -x hook.x `which python`

More info: http://www.swig.org/Doc1.3/Python.html

wware

# A litle library of memory diagnostics

# In no particular order of usefulness:
# https://pymotw.com/2/gc/
# https://code.tutsplus.com/tutorials/understand-how-much-memory-your-python-objects-use--cms-25609
# https://www.huyng.com/posts/python-performance-analysis
# http://stackoverflow.com/questions/23369937

import gc
import os