Hooking up GUI interface with asynchronous (s)ftp operation
- What asynchronous (S)FTP libraries are there for python? Ideally I should be able to do file upload resumes and track the progress of each parallel file uploads.
- If I'm running each file uploads in a separate process, how to get the upload status and display it in a progress bar dialog?
Asked by: Cadie500 | Posted: 01-10-2021
"ftplib" is the standard ftp library built in to Python. In Python 2.6, it had a callback parameter added to the method used for uploading.
That callback is a function you provide to the library; it is called once for every block that is completed.
Your function can send a message to the GUI (perhaps on a different thread/process, using standard inter-thread or inter-process communications) to tell it to update its progress bar.
If you data transfer runs in a separate thread from the GUI, you can use wx.CallAfter() whenever you have to update you progress bar from the data transfer thread.
First, using CallAfter() is mandatory as wxPython function cannot be called from child threads.
Second, this will decouple the execution of the data transfer from the GUI in the main thread.
Note that CallAfter() only works for threads, not for separate processes. In that case, using the multiprocessing package should help.Answered by: Carina861 | Posted: 02-11-2021
If you want a complete example of how to use threads and events to update your GUI with long running tasks using WxPython have a look at this page. This tutorial is quite useful and helped me perform a similar program than yours.Answered by: Emily231 | Posted: 02-11-2021
If you can't use Python 2.6's ftplib, there is a company offering a commercial solution.
Chilkat's CKFTP2 costs several hundreds of dollars, but promises to work with Python 2.5, and offers a function call get_AsyncBytesSent() which returns the information you need. (I didn't see a callback, but it may offer that too.)
I haven't used this product.
Also consider that if FTP proves to be too hard/expensive, you could always switch to HTTP uploads instead. Chilkat have a free HTTP/HTTPS upload library.Answered by: Joyce155 | Posted: 02-11-2021
Adns.py python asynchronous interface setting timeout
I have been trying to search how to perform a customizable timeout not using exceptions, alarms, sockets and not killing threads but just modifying timeout parameter via python interface in Andy Dustman code: http://code.google.com/p/adns-python/ I have found some links like:
asynchronous - Is there a way to call async interface of rust from python?
I wrap some functions of reqwest of rust into req.lib file and successfully call it from python by using cffi. However reqwest::blocking::Client force me to use multi-threading in python. I find reqwest can be called in async mode in rust. I wonder is there a way to make req.lib async? even semi-async is ok to me. For example, currently t...
Asynchronous Programming in Python Twisted
I'm having trouble developing a reverse proxy in Twisted. It works, but it seems overly complex and convoluted. So much of it feels like voodoo. Are there any simple, solid examples of asynchronous program structure on the web or in books? A sort of best practices guide? When I complete my program I'd like to be able to still see the structure in some way, not be looking at a bowl of spaghetti.
readline - How to implement a python REPL that nicely handles asynchronous output?
I have a Python-based app that can accept a few commands in a simple read-eval-print-loop. I'm using raw_input('> ') to get the input. On Unix-based systems, I also import readline to make things behave a little better. All this is working fine. The problem is that there are asynchronous events coming in, and I'd like to print output as soon as they happen. Unfortunately, this makes thi...
python - Are asynchronous Django model queries possible?
I'm new to Django, but the application that I have in mind might end up having URLs that look like this: http://mysite/compare/id_1/id_2 Where "id_1" and "id_2" are identifiers of two distinct Model objects. In the handler for "compare" I'd like to asynchronously, and in parallel, query and retrieve objects id_1 and id_2. Is there any way to do this using a standard Django syntax?...
Asynchronous method call in Python?
I was wondering if there's any library for asynchronous method calls in Python. It would be great if you could do something like @async def longComputation(): <code> token = longComputation() token.registerCallback(callback_function) # alternative, polling while not token.finished(): doSomethingElse...
Is there any way to make an asynchronous function call from Python [Django]?
I am creating a Django application that does various long computations with uploaded files. I don't want to make the user wait for the file to be handled - I just want to show the user a page reading something like 'file is being parsed'. How can I make an asynchronous function call from a view? Something that may look like that: def view(request): ... if form.is_valid(): for...
asynchronous - Tornado and Python 3.x
I really like Tornado and I would like to use it with Python 3, though it is written for Python versions 2.5 and 2.6. Unfortunately it seems like the project's source doesn't come with a test suite. If I understand correctly the WSGI part of it wouldn't be that easy to port as it's spec is not ready for
Python: asynchronous tcp socketserver
I'm looking http://docs.python.org/library/socketserver.html to try and handle asynchronous requests with the socketserver in python. At the very bottom there is an example, but it doesn't make sense. It says you use port 0 which assigns an arbitrary unused port. But how do you know what port to use for the client if they are not in th...
Python asynchronous callbacks and generators
I'm trying to convert a synchronous library to use an internal asynchronous IO framework. I have several methods that look like this: def foo: .... sync_call_1() # synchronous blocking call .... sync_call_2() # synchronous blocking call .... return bar For each of the synchronous functions (sync_call_*), I have written a corresponding async function that takes ...
Does anyone know of a asynchronous mysql lib for python?
I've been looking into non-blocking servers for python (tornado, twisted etc) but a lot of the benefits seems to be lost if there's no non-blocking connection to the database. Does anyone know if there are any projects that take care of this? (by non-blocking a la node.js) Edit: Clarified my question
Asynchronous data through Bloomberg's new data API (COM v3) with Python?
Does anyone know how to get asynchronous data through Bloomberg's new data API (COM v3) with Python? I found this code below on wilmott.com and it works just fine, but it's for the old API version. Does anyone know the corresponding code for the new version? from win32com.client import DispatchWithEvents from pythoncom import PumpWaitingMessages, Empty, Missing from time import time class BBCommEve...