| //! # Demonstrate Schema Evolution in Rust | |
| //! A structure must deserialized from several, possibly persistent, variants. | |
| //! | |
| //! ┌────────────────────────────────────────────┐ | |
| //! │ MyStruct │ | |
| //! └────────────────────────────────────────────┘ | |
| //! ▲ ▲ ▲ │ | |
| //! from from from into | |
| //! │ │ │ ▼ | |
| //! ┌───────┐ ┌───────┐ ┌───────┐ |
| /// https://play.rust-lang.org/?version=stable&mode=debug&edition=2021&gist=35d62d49d15756d1116d620099f324ae | |
| /// Example of a container using enum. | |
| use std::collections::HashMap; | |
| use serde::Serialize; | |
| #[derive(Debug, Serialize)] | |
| struct PlantA { | |
| id: String, | |
| } |
| #[derive(Clone)] | |
| struct S; | |
| fn main() { | |
| let s | |
| // Uncomment this line to provoke an "trait is not object safe" error | |
| : Box<dyn Clone> | |
| = Box::new(S); | |
| let _ = s.clone(); | |
| } |
| use itertools::put_back; | |
| use itertools::Itertools; | |
| fn main() { | |
| let qp_it = put_back([(1, 2), (2, 2), (3, 2), (4, 3), (5, 2)].into_iter()); | |
| let acc_qp_it = qp_it.batching(|it| { | |
| let mut q_acc = 0; | |
| let mut qp_acc = 0; | |
| while q_acc < 5 { | |
| match it.next() { |
| // See https://stackoverflow.com/questions/67727239/how-to-combine-including-nested-array-values-two-serde-yamlvalue-objects | |
| // Note this is not https://docs.rs/serde_yaml/latest/serde_yaml/value/enum.Value.html#method.apply_merge | |
| use serde::{Serialize, Deserialize}; | |
| use serde_yaml::Value; | |
| fn merge_yaml(a: &mut serde_yaml::Value, b: serde_yaml::Value) { | |
| match (a, b) { | |
| (a @ &mut serde_yaml::Value::Mapping(_), serde_yaml::Value::Mapping(b)) => { | |
| let a = a.as_mapping_mut().unwrap(); |
| # Please read https://blog.ganssle.io/tag/pytz.html | |
| import datetime | |
| # The Good | |
| try: | |
| import zoneinfo | |
| except ImportError: |
| """ | |
| So you are doing Python on MS Windows. Maybe even deploying your stuff on a Windows Server. | |
| By now you know that virtual environments are HEAVY on Windows, and you have many projects or application with the same | |
| copy of numpy (60MB each) over and over again. | |
| No more. Install a package by unpacking wheels (not pip install) to the corresponding versioned folder: | |
| __pypackages__ | |
| └── numpy-1.21.0 | |
| └── numpy |
| """ | |
| So you want your stdout, stderr and logs in a file, but you only know the final log file name somewhere down the road? | |
| """ | |
| import io | |
| import sys | |
| import threading | |
| from pathlib import Path | |
| from typing import IO, cast | |
A Python Application describes required packages, entry point and constraints for the operation and development process.
my_app.my_module:AppThis a Chrome extension to make yammer feed pages more user friendly. As I personally do not trust extensions from the Chrome Web Store, this extension is only offered through this gist and must be installed in Developer Mode.