HarishChaudhari

andreif

Performance of Flask, Tornado, GEvent, and their combinations

Wensheng Wang, 10/1/11

Source: http://blog.wensheng.org/2011/10/performance-of-flask-tornado-gevent-and.html

When choosing a web framework, I pretty much have eyes set on Tornado. But I heard good things about Flask and Gevent. So I tested the performance of each and combinations of the three. I chose something just a little more advanced than a "Hello World" program to write - one that use templates. Here are the codes:

1, Pure Flask (pure_flask.py)

mrkline

C# For Python Programmers

Syntax and core concepts

Basic Syntax

• Single-line comments are started with //. Multi-line comments are started with /* and ended with */.

• C# uses braces ({ and }) instead of indentation to organize code into blocks. If a block is a single line, the braces can be omitted. For example,

tadast

stonehippo

Install a new Ruby with rbenv on Mac OS (and make yourself a superhero)

If you're doing stuff with Ruby on a Mac, e.g. installling Jekyll or something, by default you'll end up having to use the sudo command to do stuff, since the permission to modify the default config is not available to your user account.

This sucks and should be avoided. Here's how to fix that.

Installing a new Ruby

To make this better, we are going install a new, custom Ruby. This used to be a big, scary thing, but thanks to the awesome tools Homebrew and rbenv, it's a snap.*

A word of warning: you will have to use Terminal to install this stuff. If you are uncomfortable with text, words, and doing stuff with your computer beyond pointing and hoping, this may not work well for you. But if that's the case, I'm not sure why you were trying to use Ruby in the first place.

ariesmcrae

import subprocess
import csv

def ping(hostname):
    p = subprocess.Popen('ping ' + hostname, stdout=subprocess.PIPE, stderr=subprocess.PIPE)

    pingStatus = 'ok';
        
    for line in p.stdout:
        output = line.rstrip().decode('UTF-8')

theblacksquid

Distributed Currency Exchange on OpenBazaar

Introduction

OpenBazaar allows for the decentralised exchange of types of currencies using the flexible Ricardian contract system. Currency exchanges are not limited trades between crypto-currencies, but can also facilitate exchanges with fiat currencies using reverisble and non-reversible payment systems.

Currency Exchanges

Fundamentally, currency exchanges require a matching of buy and sell orders at a certain price for a given volume. Firstly, buy and sell orders will be created and issued as a Ricardian contract, formatted according to a specialised 'currency' template in OpenBazaar. Secondly, matching buy and sell orders theoretically will be mediated over exchange nodes, which may also function as arbiters for each exchange. Alternative, buy and sell orders may be matched over the OpenBazaar distributed hash table. Finally, private exchanges can be made bet

subfuzion

Common Options

-#, --progress-bar Make curl display a simple progress bar instead of the more informational standard meter.

-b, --cookie <name=data> Supply cookie with request. If no =, then specifies the cookie file to use (see -c).

-c, --cookie-jar <file name> File to save response cookies to.

chriddyp

# See official docs at https://dash.plotly.com
# pip install dash pandas

from dash import Dash, dcc, html, Input, Output
import plotly.express as px

import pandas as pd

df = pd.read_csv('https://raw.githubusercontent.com/plotly/datasets/master/gapminderDataFiveYear.csv')

HarshaVardhanBabu

Requirements

1. Install Pylint from Install. If you have anaconda already installed use pip install -U pylint to update the Pylint so that pyreverse is added to the scripts folder.

2. You need to install Graphviz as the pyreverse generates the UML diagrams in dot format and needs the dot.exe provided by Graphviz. Once Graphviz is installed make sure the bin folder is added to the PATH variable so that pyreverse can find it at run time. "the command pyreverse generates the diagrams in all formats that graphviz/dot knows." (Reference

3. Now add the path of python modules for which you want to generate the documentation to PYTHONPATH.

4. Use pyreverse -S <modulename> to generate dot files in the current folder

   Usage: