Double Parentheses in Python
Python is one of the easiest programming languages to learn, because of it’s inherent flexibility. (This can be a good thing as well as a bad thing.)
One example of Python’s flexibility is the double parentheses. Take the following snippet for example:
print funcwrapper(3)(2)
Even an inexperienced programmer should be able to make sense of most of this. Reading from left to right, it looks like we want to print the output of a function, and we’re passing an integer - 3 - to that function. However, the second pair of parentheses doesn’t quite make sense.
This notation is different from what we would do if we wanted to pass two arguments to a function; in that case, we’d put them all inside a single pair of parentheses and separate them via commas:
print funcwrapper(3, 2)
So what does the first example using two pairs of parentheses accomplish?
The use of a double parentheses is actually an indicator of one of Python’s coolest features - and that is that functions are themselves, objects! What does this mean?
Let’s work our way up to the snippet above by first defining a very simple function - something that takes an integer Continue reading
Citizens of Tech 004 – Retro Virtual Reality Kittehs
A cat sets a world record. A surgical robot gets hacked. Capsela was a sweet toy. Oculus Rift is going to be available soon. Larsen B is falling into the Antarctic Ocean. Spotify takes on video. All this & more on this week's Citizens of Tech with Eric Sutphen & Ethan Banks.
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The post Citizens of Tech 004 – Retro Virtual Reality Kittehs appeared first on Packet Pushers Podcast and was written by Ethan Banks.
Citizens of Tech 004 – Retro Virtual Reality Kittehs
A cat sets a world record. A surgical robot gets hacked. Capsela was a sweet toy. Oculus Rift is going to be available soon. Larsen B is falling into the Antarctic Ocean. Spotify takes on video. All this & more on this week's Citizens of Tech with Eric Sutphen & Ethan Banks.
The post Citizens of Tech 004 – Retro Virtual Reality Kittehs appeared first on Packet Pushers.
SDxCentral Weekly News Roundup — May 22, 2015
Tsk, tsk, Cisco -- a possible Nutanix acquisition and illegal deals with the Russians? Find out more in this week's roundup!
Double Parentheses in Python
Python is one of the easiest programming languages to learn, because of it’s inherent flexibility. (This can be a good thing as well as a bad thing.) One example of Python’s flexibility is the double parentheses. Take the following snippet for example: print funcwrapper(3)(2) Even an inexperienced programmer should be able to make sense of most of this. Reading from left to right, it looks like we want to print the output of a function, and we’re passing an integer - 3 - to that function.Double Parentheses in Python
Python is one of the easiest programming languages to learn, because of it’s inherent flexibility. (This can be a good thing as well as a bad thing.) One example of Python’s flexibility is the double parentheses. Take the following snippet for example: print(funcwrapper(3)(2)) Even an inexperienced programmer should be able to make sense of most of this. Reading from left to right, it looks like we want to print the output of a function, and we’re passing an integer - 3 - to that function.Show 238 – A Deeper Look at SD-WAN with CloudGenix – Sponsored
Vijay Sagar and Aaron Edwards of CloudGenix discuss the software defined WAN with the Packet Pushers. We've heard from CloudGenix before on Priority Queue Show 49. If you missed that show, you might want to give it a listen first to get the most out of this podcast. On this show, we go a bit deeper into CloudGenix -- what it does, how it does it, and how you'd integrate it into your network.
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The post Show 238 – A Deeper Look at SD-WAN with CloudGenix – Sponsored appeared first on Packet Pushers Podcast and was written by Ethan Banks.
PlexxiPulse—A Visit From Networking Legend Dr. Doug Comer
It has been an exciting week here at Plexxi! Dr. Doug Comer spent the day with us on Wednesday learning about our products and new network architecture. Dr. Comer is an internationally recognized networking guru, widely known for his series of groundbreaking textbooks on computer networks, the Internet, computer operating systems and computer architecture (including the popular ‘Internetworking with TCP/IP’). He designed and implemented X25NET and Cypress networks as well as the Xinu operating system. He is currently a professor of computer science at Purdue University where he teaches courses on operating systems and computer networks. It was a pleasure having him at the Plexxi headquarters—we hope he learned as much from us as we did from him! Take a look at a few photos from his visit.
Below please find a few of our top picks for our favorite news articles of the week. Have a great Memorial Day weekend!
InfoWorld: 3 ways the data lake is actually not helping with IT agility
By Yves de Montcheuil
Loosely speaking, a data lake is the big data version of an operational data store, plus a network storage appliance, plus data processing/query engines, all combined — typically in a Hadoop cluster Continue reading
Why Security Startup Skyport Systems is Hot
If you want 'security by default,' hardware is the place to be, even in a software-defined world.
Segment Routing 101 on Software Gone Wild
With all the hype around Segment Routing we said: “let’s chat about it, what could possibly go wrong”. The result: Episode 33 of Software Gone Wild. We didn’t get very far into the technical details, but you might still find the overview useful (or not – do tell me how good or useless it is).
HP’s Q2: Networking & Software Disappoint Again
Q2 revenue falls yet again for networking and software.
Industry ViewPoints – Zero-Touch Network as a Service, Part 2
Telecommunications providers discuss opportunities provided by SDN, NFV, and NaaS
Register Now & Explore Lifecycle Service Orchestration in an SDN/NFV World!
Register now to explore the new trends in the lifecycle service orchestration market with Oracle and the Rayno Report.
Tutorial for creating first external SDN application for HP SDN VAN controller – Part 1/3: LAB creation and REST API introduction
For best article visual quality, open Tutorial for creating first external SDN application for HP SDN VAN controller – Part 1/3: LAB creation and REST API introduction directly at NetworkGeekStuff.
In this tutorial series, I will show you by example, how to build your first external REST API based SDN application for HP SDN VAN controller, with web interface for the user control. Target will be to learn how to use REST API, curl and perl scripting to generate some basic and useful code to view and also manipulate network traffic.
This article is part of “Tutorial for creating first external SDN application for HP SDN VAN controller” series consisting these articles:
- Part 1/3 – LAB creation and REST API introduction
- Part 2/3 – Influencing Flows via cURL commands
- Part 3/3 – “Node Cutter” perl application with web interface
In this Part 1/3, we will discuss creation of a quick development lab with HP SDN VAN controller and Mininet network and explore the REST API interface quickly.
Internal vs External SDN applications
The difference is this, external applications do not need to run inside the SDN controller itself and can rely on REST API commands transferred over network from Continue reading