I'm at beginner level, I've given my 2 months at basics level in python. I'm familiar with algorithms, matrix and etc programming stuffs into python.
I want to give my whole life to django. But problem is i don't anything about web python stuffs except starting server on it.
I've started my server using:
import http.server
import socketserver
PORT = 8000
def playServer():
handler = http.server.SimpleHTTPRequestHandler
httpd = socketserver.TCPServer(("", PORT), handler)
print("Serving at port", PORT)
httpd.serve_forever()
But when i call my simple web page, It still shows the codes of python, Please take a look at SCREENSHOT.
Please help me, How to make web page using python coding? Also let me know, Am i capable to start giving time with django? I've heard django is a framework, So i should give basics time to learn some python web page stuffs? right?
HELP WOULD BE APPRECIATED!!
https://docs.djangoproject.com/en/1.8/intro/tutorial01/, you have a lot to learn my friend but this tutorial will teach you how to get setup/install Django and give you a good base to start up with. Good luck with learning my man, any questions just comment below. BTW what you just did was not even Django at all, it was just starting a local webserver in python.
Obviously, teaching yourself is the hardest way to learn any skill. If you really do want to learn django, or anything else life, you're going to have to commit yourself, be patient, and ready to fail.
If you're really serious about this, I would work through the Django Book. This covers every aspect of django to get you started.
You're going to run into problems early and often. When you do so, stop and consort the docs, never be afraid to look directly at the source code and as always, come to SO with specific questions.
To answer you're more specific question, Django is nice in the fact that it hides all of the code you have above. For instance, once you have it configured, the line below will start a local server and you'll be able to interact with your web app through a web browser.
python manage.py runserver
Looks like you're trying to execute the python script directly from browser.
First you must call the script from the command-line, then check the address on browser.
Also, you need to call the playServer() method at the end of the file to start the HTTP server.
then go the the address:port on your browser. It'll look something like this:
Now about the second question,
I'll highly recommend you to start with Flask instead of Django.
It's simpler than django and best for beginners, and does less magic.
Also, as soon as you're comfortable with flask, you can easily move to django and have more fun while playing with it thereafter.
Related
I'm pretty new to programming and I've been learning python in my spare time. As a challenge to myself, I created a simple text adventure for a class project. This is not for a programming class, so the professor won't know how to compile a raw Python script, let alone have a Python interpreter on their Mac.
That being said, is it possible to run python from a browser? I'm imagining some HTML file that my professor, or anyone, can click that launches a browser and they can play my game from there.
I've learned about something called Django from my research on this subject. However, I have no idea what it is, nor how to implement it. Again, I'm pretty new to programming, so if you could "explain like I'm five", that would be great.
EDIT: I found this other thread where the OP asks a similar question, but I don't fully understand the approved answer:
execution python application from browser
Well, not really. Your basic browser generally supports 1 programming language, javascript.
However, you could use pythonanywhere" which is a hosted python environment.
You could also try skulpt which is a javacript implementation of python. I have never tried this myself.
You can host a website on an internal network and run the program from there. Read more about the Python CGI programming
here to make a form that will execute your script and print the result as a html page
For example you could have a form that will ask for input in textboxes: Name: _, Value: __, SUBMIT
After they press the button, the browser will then send a request to the python program, execute it, and display the result back to the client as a html webpage.
In addition, you do not need to install any other third-party modules if you are using a school computer. However, ask you teacher before hosting the website on the school network.
The problem is that your program is a "text adventure" which requires a lot more input/output management for a CGI program.
You can use this answer for other projects.
Anyway, here are the steps to setup the server:
1) Create a folder for your website and add a "index.html" file (it can be anything)
2) Add a favicon.ico file in the folder (this will speed up the connection) You can download this one
3) Put this python program in the folder (it will be used to host the website)
import BaseHTTPServer
import CGIHTTPServer
import cgitb; cgitb.enable()
from socket import gethostbyname, gethostname
def server(port):
server = BaseHTTPServer.HTTPServer
handler = CGIHTTPServer.CGIHTTPRequestHandler
server_address = ("", port)
httpd = server(server_address, handler)
print "Server %s:%s started" % (gethostbyname(gethostname()), str(port))
httpd.serve_forever()
server(4) #You can change this. It is a port number
4) Create a cgi-bin folder
5) To make the website available, execute the program created in the step 3. To stop hosting it, just close the python console.
6) While the program is running, you can go into the browser and type the IP adress : port as the URL. You will see your index.html page and favicon.ico icon. Anyone who is connected to the same network can get to the website. You and only you can also get to the website in a browser by entering http:/localhost:port with "port" being the port you've set
7) The rest you need to manage yourself. I cannot create the full script because I do not know what is in your program. Read the link provided in the beginning and modify your program to make it work in the browser.
FYI: It is possible to host more than one website or an instance of the same website at once using different ports. And, you can set and read cookies using Python CGI
Please comment if something doesn't work because of an error in my answer. I will try to fix it.
All of the answers so far assume that your game is something that can be presented as a web app. You can only do that if you write or covert your program (or part of it) into Javascript, which may not actually work because the existing compilers (e.g. pyjs) are quite limited.
If you made your program in a GUI (using 'Tkinter', 'Pygame', wxPython, PyQt, etc.), your best option is to package your program into a Mac app using py2app or pyinstaller.
I have a bunch of Google alerts set up as rss feeds that update in real time. What I want is to be able to store the new data the rss feed is sending out in a database.
After looking around I found Google and Superfeedr both offer hubs that do most of the work for you; however they both require a callback url (obviously). I do have an Apache server running on the machine I'm working off, it already has python enabled so I can run python scripts on my server. However at the moment its only accessible from within my LAN.
What my real question is, what do I do next? I know that in php you would just have a call back file that handles requests but I'm lost as to what to do in python. Would I write a script and give the google/superfeedr services a url to that script? What would be in the script? Specific imports needed?
Also, I just read that if you use XMPP you don't need a callback url. How does that work?
For the local LAN problem, the most commonly used solution is to use tuneling solutions like Passageway. They will temporarily expose a local port of your machine to the "outer" web.
Now, as for implementation, it's fairly easy to set things up. Python is similar to PHP in the sense that you'll have to write a script that listen on networking connection and then handles the HTTP requests you're getting from Superfeedr or Google. (it looks like you're not familiar with Python, why not stick to PHP then?)
Finally XMPP is a feature that only us (Superfeedr) offer. It solves the problem of exposing local ports because it works behind the firewall.
I'm trying to debug an internal server error in my django app, running on heroku. I'm
completely new to all of this web server stuff so I really have no idea what to do.
It seems like the stdout output is sometimes getting logged in heroku logs and sometimes not. I was reasonably sure that the program was reaching a certain line but the prints at that point are simply not showing up.
I am seeing the 500 error in my heroku logs file, but there is no stack trace or anything else in there. I am trying to create a web server to respond to GET and POST requests from various applications I have running, meaning I don't know how to debug this in a web browser, if thats even applicable. The current error is on a POST request sent to the webserver. I can't replicate this locally because the Http module I am using, http://www.python-requests.org/en/latest/ seems to be unable to connect to a local ip address.
I have done some extensive googling for the last hour and I haven't found any help. Do I need to enable logging or something somewhere in heroku? I am completely new to this so please be explicit in your explanations. I have heard mention of a way to get stack traces emailed to you but I haven't seen an explanation of how to do that. is that possible?
Thanks!
I would recommend 2 things in this case:
First: use python's logging facility rather than print statements (http://docs.python.org/2/howto/logging-cookbook.html). This gives you much more control over where your statements end up, and allows you to filter them.
Second: use a logging add-on. This vastly increases the amount of logging you can store (loggly keeps all your logs for 24 hours even in the "free" size), so you don't have to worry about the relevant information falling out before you get around to looking at it.
I've used web.py to create a web service that returns results in json.
I run it on my local box as python scriptname.py 8888
However, I now want to run it on a linux box.
How can I run it as a service on the linux box?
update
After the answers it seems like the question isn't right. I am aware of the deployment process, frameworks, and the webserver. Maybe the following back story will help:
I had a small python script that takes as input a file and based on some logic splits that file up. I wanted to use this script with a web front end I already have in place (Grails). I wanted to call this from the grails application but did not want to do it by executing a command line. So I wrapped the python script as a webservice. which takes in two parameters and returns, in json, the number of split files. This webservice will ONLY be used by my grails front end and nothing else.
So, I simply wish to run this little web.py service so that it can respond to my grails front end.
Please correct me if I'm wrong, but would I still need ngix and the like after the above? This script sounds trivial but eventually i will be adding more logic to it so I wanted it as a webservice which can be consumed by a web front end.
In general, there are two parts of this.
The "remote and event-based" part: Service used remotely over network needs certain set of skills: to be able to accept (multiple) connections, read requests, process, reply, speak at least basic TCP/HTTP, handle dead connections, and if it's more than small private LAN, it needs to be robust (think DoS) and maybe also perform some kind of authentication.
If your script is willing to take care of all of this, then it's ready to open its own port and listen. I'm not sure if web.py provides all of these facilities.
Then there's the other part, "daemonization", when you want to run the server unattended: running at boot, running under the right user, not blocking your parent (ssh, init script or whatever), not having ttys open but maybe logging somewhere...
Servers like nginx and Apache are built for this, and provide interfaces like mod_python or WSGI, so that much simpler applications can give up as much of the above as possible.
So the answer would be: yes, you still need Nginx or the likes, unless:
you can implement it yourself in Python,
or you are using the script on localhost only and are willing to take some
risks of instability.
Then probably you can do on your own.
try this
python scriptname.py 8888 2>/dev/null
it will run as daemon
I have been working with python for a while now. Recently I got into Sockets with Twisted which was good for learning Telnet, SSH, and Message Passing. I wanted to take an idea and implement it in a web fashion. A week of searching and all I can really do is create a resource that handles GET and POST all to itself. And this I am told is bad practice.
So The questions I have after one week:
* Are other options like Tornado and Standard Python Sockets a better (or more popular) approach?
* Should one really use separate resources in Twisted GET and POST operations?
* What is a good resource to start in this area of Python Development?
My background with languages are C, Java, HTML/DHTML/XHTML/XML and my main systems (even home) are Linux.
I'd recommend against building your own web server and handling raw socket calls to build web applications; it makes much more sense to just write your web services as wsgi applications and use an existing web server, whether it's something like tornado or apache with mod_wsgi.
If what you're doing is more of a web site than an API, look into using a normal web framework like Django.
I'll try to answer your various points individually.
Are other options like Tornado and Standard Python Sockets a better
(or more popular) approach?
WSGI frameworks are by far the most popular options these days. They can give you
access to GET and POST primitives, but often wrap them with enough syntactic sugar
to get you off to the races quickly.
Hardly anyone deals with sockets for htt. To give you an idea, one of the more popular http libraries, requests initially wrapped urrllib2 up until recently.
Should one really use separate resources in Twisted GET and POST operations?
I can't speak to this as I'm not a Twisted developer. It seems to be a language unto itself.
What is a good resource to start in this area of Python Development?
For handling GETs and POSTs, Webob is probably a good place to start.
For some more context, webob is wrapping base Python primitives coming from WSGI (rhymes with "whiskey"). WSGI is an interface between web applications and servers, not unlike CGI.
PEP 3333, the document which defined the WSGI standard, is a really good place to start if you're interested in the nitty gritty of http.
Going a bit lower in the stack, there are also a number of WSGI servers worth checking out. Cloud-hosted, Platform-as-a-Service (PaaS) options like Google App Engine and Heroku will take care of the details for you. On the other hand, there's specialized wsgi servers like gunicorn and Tornado, the latter of which you're already familiar with.
If you are looking to just get stuff done, check out Bottle, Flask, Django, or any of the other great Python web frameworks out there.