I've been looking at the source HTML for various websites, and it would make my life much easier if I could call functions from the website I'm accessing on will. I'm using Python, but please keep in mind I am somewhat of a novice.
If you're looking to access someone else's website using Python, you'll need to look into something like Python's urllib and beautifulsoup.
If you want to execute functions inside that website (that require Javascript), you'll need to use a Python browser emulator like enter link description here which is described here. Hope this helps! It's quite a complex question.
If you're looking to create a webpage that runs Python code, that's unreasonable, as all Python code in web development is run server-side, and you'll have to rely on something like Javascript for that.
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My problem is as follows:
I have written a python code, and I need to run it on a web page.Basically I need that whatever is on the console should be displayed as it is.
I have no experience in web development and similar libraries, and I need to get this done in a short time. Kindly tell how should I proceed?
Note: I might be plotting some graphs also. It would be great if they could be displayed all at once(sequentially) on the website
https://brython.info/
https://skulpt.org/
https://pyodide.org/en/stable/
There are multiple python implementation on browser, some are webassemble some are javascript.
Is it a good idea to run python on browser as a replacement for javascript in 2022? No it is not, learn javascript. No in-browser python implementation can race with javascript as of today and most probably ever.
You Can't execute Python-Code directly inside a webbrowser - however, you could for instance create a basic IDE in HTML & JS, send code written by a user on the page to a Server, which would then run the code and send the results back to the client-page.
Unfortunately, such a project is quite ambitious and complicated, especially when Security & Stability are of mayor concern, as executing client-code is a very dangerous measure indeed, and requires expertise in Virtualization Techniques & Software.
Another Method could be to use a public API, which allows you to run Python code and fetch the results back. The procedure would be exactly the same as with the previous idea in terms of creating the web-client, but the heavy-lifting - which is actually executing the Python-code, would be taken care of for you.
As you can see, there is no concrete answer to this question, only suggestions.
A few useful links below:
https://docs.docker.com/
https://appdividend.com/2022/01/18/best-python-online-ide/
https://www.makeuseof.com/tag/programmer-browser-ides/
https://www.youtube.com/watch?v=og9Gaj1Hzag
How do I execute a string containing Python code in Python?
This question already has answers here:
Web-scraping JavaScript page with Python
(18 answers)
Closed 4 hours ago.
What is the best method to scrape a dynamic website where most of the content is generated by what appears to be ajax requests? I have previous experience with a Mechanize, BeautifulSoup, and python combo, but I am up for something new.
--Edit--
For more detail: I'm trying to scrape the CNN primary database. There is a wealth of information there, but there doesn't appear to be an api.
The best solution that I found was to use Firebug to monitor XmlHttpRequests, and then to use a script to resend them.
This is a difficult problem because you either have to reverse engineer the JavaScript on a per-site basis, or implement a JavaScript engine and run the scripts (which has its own difficulties and pitfalls).
It's a heavy weight solution, but I've seen people doing this with GreaseMonkey scripts - allow Firefox to render everything and run the JavaScript, and then scrape the elements. You can even initiate user actions on the page if needed.
Selenium IDE, a tool for testing, is something I've used for a lot of screen-scraping. There are a few things it doesn't handle well (Javascript window.alert() and popup windows in general), but it does its work on a page by actually triggering the click events and typing into the text boxes. Because the IDE portion runs in Firefox, you don't have to do all of the management of sessions, etc. as Firefox takes care of it. The IDE records and plays tests back.
It also exports C#, PHP, Java, etc. code to build compiled tests/scrapers that are executed on the Selenium server. I've done that for more than a few of my Selenium scripts, which makes things like storing the scraped data in a database much easier.
Scripts are fairly simple to write and alter, being made up of things like ("clickAndWait","submitButton"). Worth a look given what you're describing.
Adam Davis's advice is solid.
I would additionally suggest that you try to "reverse-engineer" what the JavaScript is doing, and instead of trying to scrape the page, you issue the HTTP requests that the JavaScript is issuing and interpret the results yourself (most likely in JSON format, nice and easy to parse). This strategy could be anything from trivial to a total nightmare, depending on the complexity of the JavaScript.
The best possibility, of course, would be to convince the website's maintainers to implement a developer-friendly API. All the cool kids are doing it these days 8-) Of course, they might not want their data scraped in an automated fashion... in which case you can expect a cat-and-mouse game of making their page increasingly difficult to scrape :-(
There is a bit of a learning curve, but tools like Pamie (Python) or Watir (Ruby) will let you latch into the IE web browser and get at the elements. This turns out to be easier than Mechanize and other HTTP level tools since you don't have to emulate the browser, you just ask the browser for the html elements. And it's going to be way easier than reverse engineering the Javascript/Ajax calls. If needed you can also use tools like beatiful soup in conjunction with Pamie.
Probably the easiest way is to use IE webbrowser control in C# (or any other language). You have access to all the stuff inside browser out of the box + you dont need to care about cookies, SSL and so on.
i found the IE Webbrowser control have all kinds of quirks and workarounds that would justify some high quality software to take care of all those inconsistencies, layered around the shvwdoc.dll api and mshtml and provide a framework.
This seems like it's a pretty common problem. I wonder why someone hasn't anyone developed a programmatic browser? I'm envisioning a Firefox you can call from the command line with a URL as an argument and it will load the page, run all of the initial page load JS events and save the resulting file.
I mean Firefox, and other browsers already do this, why can't we simply strip off the UI stuff?
I have been wondering about this since I could really benefit from a program that makes actions on websites that I use for my job that require the same command over and over again.
I know some python and I love to learn new things.
I tried looking for it on google but I guess I'm not sure how to find it.
I would love it if you could direct me to a guide or something like that.
Thank you very much!
Selenium interacts with a web browser directly, although you can hide the browser window in the code (look up Selenium in --headless mode). This is a good choice for filling out a lot of forms or interacting with graphical user interface elements.
However, if you need to request information from websites, you don't always need to interact with the web browser directly. You can use the package called Requests. This doesn't depend on any web browsers and can run silently in the background.
I think you can do it with Python and some packages like selenium. Also you need some html knowledge to search in the html source code of the specific wegpage.
I found an interesting use case, maybe that helps you:
https://towardsdatascience.com/controlling-the-web-with-python-6fceb22c5f08
This question already has answers here:
How can I include python script in a HTML file?
(10 answers)
Closed 6 months ago.
I'm trying to look for a way to embed Python code inside an HTML page.
I'm NOT talking about using Python as the back-end with tools like Django or Flask. I would like to implement a very very basic console on my webpage so that I can show off Python scripts running, not just pure code. The user would then be able to modify the python, then re-run it to see changes.
Suppose I'm making a python programming tutorial website, and I want the user to see that print("hello world"), when run, output "hello world".
Is there a way to achieve this?
Python inside HTML
Allows you to be able to embed Python within HTML documents, similiar to mod_Python or PHP.By taking advantage of both the Module: digiweb and a slightly modified version of PythonInsideHTML.zip from the BSD licensed project Karrigell Python web server to make it a stand alone library. It is possible to run embed Python within a HTML document that can be executed at run time.
Download Here
I found that it's called a "Fiddle". That was the keyword to know for further google searches. I've tried most of them, they don't work, except for one, https://ideone.com/ They also allow to easily embed it in your own web page, which is exactly what I needed.
The best way is to set up a web framework that uses Python. Some good choices are Django, TurboGears, and Pyramid. While it is possible to do pure Python CGI or as an ISAPI extension, you don't really gain much from that approach, and a web framework is bound to be more efficient, understandable, and helpful.
Furthermore, web frameworks come with a philosophy and contain a lot of careful thought and best practices that you can learn from while you're working.
Below are some web site links -
https://docs.pylonsproject.org/en/latest/
http://turbogears.org/
https://www.djangoproject.com/
I have written a python file with several functions. Now I'm writting a web page where I want to call a function of the file that I mentioned before, by pressing a button but I don't know how.
Can someone help me, or telling me where can I look for some example where python and html are connected.
I'm going to talk only about a front end solution , well known solution for back end only exist (Django) and the others will certainly talk about it.
Beforehand, you should know that using Python as a front end web language is very strange.
The "King" of these languages is JavaScript, and if you want to go further with web development, especially with front end frameworks (AngularJS, react), you should probably learn it.
That being said, there is a way to achieve what you want.
Either with this Python framework, or with a transpiler.
First, you need to set up a server to handle HTTP requests.
Then, something that can interpret python codes is needed. mod_wsgi is a good choice for python. But for a simpler way, you can also use CGI (take a look here).
Edit:
A more complete/structured solution is using a python web framework. For instance, Django or Flask. But be prepared to spend more time on them.