Pradip Caulagi caulagi

A list of python snippets I find interesting

The Python standard library has an implementation of Counter that is typically used to find the most common items in a a collection, with their count. I find the implement of collections.Counter instructive in general. I especially like the implementation of most_commonlink. I find it interesting how most_common determines which method to use for efficiency reasons (based on n).
In heapq module (standard library), implemention of nsmallestlink. In general, the heapq module has awesome comments. This is true for nsmallest method also. Also, I like how this method is lazy (stores only k items irrespective of input) and generic (the optional key).

	User.findOne({ email: email }, function (err, user) {
	if (err) { return done(err) }
	if (!user) {
	return done(null, false, { message: ‘Unknown user’ })
	}
	if (!user.authenticate(password)) {
	return done(null, false, { message: ‘Invalid password’ })
	}
	return done(null, user)
	})

	thread 'main' panicked at 'there is no reactor running, must be called from the context of Tokio runtime', /Users/pradip.caulagi/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-0.2.24/src/io/driver/mod.rs:204:14
	stack backtrace:
	0: rust_begin_unwind
	at /rustc/7eac88abb2e57e752f3302f02be5f3ce3d7adfb4/library/std/src/panicking.rs:483
	1: core::panicking::panic_fmt
	at /rustc/7eac88abb2e57e752f3302f02be5f3ce3d7adfb4/library/core/src/panicking.rs:85
	2: core::option::expect_failed
	at /rustc/7eac88abb2e57e752f3302f02be5f3ce3d7adfb4/library/core/src/option.rs:1226
	3: core::option::Option<T>::expect
	at /Users/pradip.caulagi/.rustup/toolchains/stable-x86_64-apple-darwin/lib/rustlib/src/rust/library/core/src/option.rs:346

	$ kubectl -n capg-system get pod capg-controller-manager-68869d55b7-nkhjm -o yaml
	apiVersion: v1
	kind: Pod
	metadata:
	creationTimestamp: "2020-11-11T19:41:14Z"
	generateName: capg-controller-manager-68869d55b7-
	labels:
	cluster.x-k8s.io/provider: infrastructure-gcp
	control-plane: capg-controller-manager
	pod-template-hash: 68869d55b7

	<!DOCTYPE html>
	<html>
	<head>
	<title>Mermite</title>
	<style>
	div {
	font-family: -apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif,Apple Color Emoji,Segoe UI Emoji,Segoe UI Symbol;
	font-size: 22px;
	line-height: 1;
	opacity: 0.70;

	Finished dev [unoptimized + debuginfo] target(s) in 1.56s
	Running `target/debug/frontend-server`
	thread 'main' panicked at 'no current reactor', /Users/pradip.caulagi/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-0.2.6/src/io/driver/mod.rs:243:21
	stack backtrace:
	0: 0x106200065 - std::sys_common::at_exit_imp::push::h0636e6b5f7616352
	1: 0x10621ae90 - core::fmt::ArgumentV1::show_usize::hca33af0aed7db5c5
	2: 0x1061fba5b - std::io::Write::write_fmt::he6837371b9a45188
	3: 0x106201da3 - std::panicking::default_hook::{{closure}}::h708e66cfeb0483ba
	4: 0x106201aaa - std::panicking::default_hook::h39ea8ddf674c04ec
	5: 0x10620246b - <std::panicking::begin_panic::PanicPayload<A> as core::panic::BoxMeUp>::get::hf147e9d6b92d24d8

	import asyncio


	async def fibonacci(n, marker):
	print(f'Marker: {marker}')
	if n < 2:
	return 1
	return await fibonacci(n-1, marker) + await fibonacci(n-2, marker)

	def register_sentry():
	cherrypy.tools.report_to_sentry = cherrypy.Tool('before_error_response', report_to_sentry)
	cherrypy.config.update({
	'tools.report_to_sentry.on': True
	})


	def report_to_sentry():
	sentry_dsn = settings.sentry_dsn
	if not sentry_dsn: