There are three main concepts with Rust:
These are fairly simple concepts, but they are often counter-intuitive to concepts in other languages, so I wanted to give a shot at
| Nullsoft Database Engine Format Specifications v1.0 | |
| --------------------------------------------------- | |
| 1. Tables |
| def get_count(q): | |
| count_q = q.statement.with_only_columns([func.count()]).order_by(None) | |
| count = q.session.execute(count_q).scalar() | |
| return count | |
| q = session.query(TestModel).filter(...).order_by(...) | |
| # Slow: SELECT COUNT(*) FROM (SELECT ... FROM TestModel WHERE ...) ... | |
| print q.count() |
This is a small demo of how to create a library in Rust and call it from Python (both CPython and PyPy) using the CFFI instead of ctypes.
Based on http://harkablog.com/calling-rust-from-c-and-python.html (dead) which used ctypes
CFFI is nice because:
ctypes| """ | |
| Example code | |
| ============ | |
| """ | |
| import typing as T | |
| from flask import request, redirect | |
| if T.TYPE_CHECKING: | |
| from ..lib.cls_endpoint import CLSEndpointFlask |
| """Convert lat/long from float to int | |
| Revision ID: b020841d98e4 | |
| Revises: 6e741a21efc8 | |
| Create Date: 2019-07-10 20:03:38.282042 | |
| Given a source table like | |
| class GPS(Base): | |
| # $--RMC, hhmmss.sss, x, llll.lll, a, yyyyy.yyy, a, x.x, u.u, xxxxxx,, , v * hh < CR > < LF > |
| import subprocess | |
| import threading | |
| import queue | |
| import os | |
| import time | |
| class Runner(object): | |
| def __init__(self, cmd: []): | |
| self.cmd = cmd |
| """ | |
| A flask like reloader function for use with txweb | |
| In user script it must follow the pattern | |
| def main(): | |
| my main func that starts twisted | |
| if __name__ == "__main__": |
| /***************************************************************** | |
| * onMessage from the extension or tab (a content script) | |
| *****************************************************************/ | |
| chrome.runtime.onMessage.addListener( | |
| function(request, sender, sendResponse) { | |
| if (request.cmd == "any command") { | |
| sendResponse({ result: "any response from background" }); | |
| } else { | |
| sendResponse({ result: "error", message: `Invalid 'cmd'` }); | |
| } |
| Dislaimer | |
| ######### | |
| I've been using Komodo IDE since the mid-90's but I AM NOT AN ACTIVE STATE EMPLOYEE. This is on your ownware with a I don't care license. | |
| No warranty of the code is offered, read the code, and only install it if you understand what it does. | |
| Semi-rant | |
| ######### | |
| Pre-retirement, it was my in-house rule that all projects used virtualenv. It made it easier to `pip freeze > requirements.txt` | |
| dependancies. Last thing I ever wanted to experience was having a "Oh my god everything is broken" call and spend an hour reverse |