Jack Wearden NotBobTheBuilder

How to recover lost Python source code if it's still resident in-memory

I screwed up using git ("git checkout --" on the wrong file) and managed to delete the code I had just written... but it was still running in a process in a docker container. Here's how I got it back, using https://pypi.python.org/pypi/pyrasite/ and https://pypi.python.org/pypi/uncompyle6

Attach a shell to the docker container

Install GDB (needed by pyrasite)

apt-get update && apt-get install gdb

Prepare the installation with LVM drivers

DISCLAIMER: Copied from [https://raspberrypi.stackexchange.com/questions/85958/easy-backups-and-snapshots-of-a-running-system-with-lvm/85959]

Moving the installation isn't the problem but the LVM drivers must be loaded on boot up so the root partition can be mounted and used for booting. Fortunately the Raspberry Pi supports loading a ramdisk for initrd so we have to do an additional step to create the initram containing drivers for LVM.

The following is only for a quick setup an initramfs where you have to monitor kernel updates by yourself. To use a more automated setup an initramfs you can look at How can I use an init ramdisk (initramfs) on boot up Raspberry Pi?.

If you are unexperienced with linux please try it first with a new image how I did for this How To. You can loose all data.

For reference I use Raspbian Buster with Desktop 2020-02-13, flashed it to a SD Card and boot it in a RasPi. First do an upgrade to get the latest software versions and instal

	import java.net.InetSocketAddress

	import akka.actor.{ActorSystem, Props, Actor}
	import akka.io.{Tcp, IO}
	import akka.io.Tcp._
	import akka.util.ByteString

	class TCPConnectionManager(address: String, port: Int) extends Actor {
	import context.system
	IO(Tcp) ! Bind(self, new InetSocketAddress(address, port))


	import matryoshka.data.Fix
	import org.opencypher.spark.prototype.api.cyphertype.UnFixable.RecursiveExtractor
	import matryoshka.Recursive
	import shapeless.ops.hlist.Tupler

	import scala.language.higherKinds
	import scala.reflect.ClassTag
	import scalaz.Functor

	// @flow
	import {PassThrough} from 'stream';

	class SSEStream extends PassThrough {
	_compressor = null;

	_read (size) {
	super._read(size);

	if (this._compressor) {