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Python 3.6 HTTP Server not reachable when compiled by PyInstaller on Windows

I created a web server in Python 3.6 using http.server.HTTPServer, http.server.SimpleHTTPRequestHandler and socketserver.ThreadingMixIn. It works as expected and I can access the webpage from any device on the local network.
I compiled it with PyInstaller to create a Windows executable. The webpage works with localhost, but it is not accessible from any device on the local network.
I used nmap from another device to scan the computer hosting the web server, and it appears that the port used by the webserver (8080) is open when I run my script normally (with the Python interpreter), and everything works. However, when I use the executable produced by PyInstaller the port isn't open and the webpage not reachable.
The executable doesn't produce any errors, and apart from that everything works.
I have tried to run the .exe file as administrator, and to this disable my antivirus/firewall. It doesn't work.
Here is my PyInstaller command :
pyinstaller --runtime-tmpdir "" --onefile -i icon.ico script.py
And here is the relevant code in my python file :
import http.server
import socketserver
port = 8080
class ThreadingSimpleServer(socketserver.ThreadingMixIn, http.server.HTTPServer):
pass #using this so the webserver can handle mutliple requests at a time
class myWebServer(http.server.SimpleHTTPRequestHandler):
def do_POST(self):
#does stuff
try:
server = ThreadingSimpleServer(('', port), myWebServer)
server.serve_forever()
except KeyboardInterrupt:
print('^C received, shutting down the program.')
server.socket.close()

I run your code and it works for me. The O.S. ask about opening the connection and everything seems to be ok. You must produce a log of some kind in order to let us understand what is going wrong. In my run i omit the -i switch because I don't have a .ico file.

Ok so I solved the issue but I still don't understand what caused it. Since the beginning I was building my script in a folder located in AppData : it wasn't working and I had no Windows firewall warning/confirmation showing up.
I moved my script to the Desktop and compiled it here : the Windows firewall confirmation showed up (this one) and the executable worked well.
I thought maybe the firewall might have flagged my program earlier and all the subsequent builds were blacklisted or something like that so I tried to compile the script in the original location, but this time I renamed it and I deleted all the files generated previously : it didn't work either (and no firewall confirmation/warning).
So now i'm pretty sure the error was caused by the firewall, and it had to do with the location from where the build was done, but I don't really understand why.

using flask in spyder stuck in local server

I am trying to create a web application using flask. I have already gotten somewhat comfortable with using python, and have done so using spyder, inside of Anacanda Navigator. Now I am playing around with flask doing basic functions and have successful so far by testing it out in local server 127.0.0.1:5000. The problem I am having is that I cannot stop the server once I run the script in spyder. I have stopped the script and run other scripts through the console, but the local server remains the same.
The reason this is a problem for me is because when I try to change files and run a different flask script, the server does not update with the new information. For example, if I run a flask script that returns "Hello World" on the main page, and then I stop that file, open a new file that has a different flask script that returns "The sky is blue" the server does not change when I check it on chrome or any other browser. It will onyl return "Hello World"
I have been able to fix this problem by completely restarting my computer, but I am wondering if there is another way, just to restart the local server, 127.0.0.1:5000. Thank You!
Also I am using windows

I do : "Run > Configuration per file > Execute in an external system terminal",
then when you run your .py containing the app.run, it will be launched in an external console. If you close the console the server will be closed too.

To Kill the local server, you may use Ctrl+C command and not any other command. This command is also mentioned when the server is up and running.

I've been having this precise issue and have been smashing my head against the wall for a couple of hours. I posted the referenced StackOverflow question (my first actually) and it seems that running a script from inside Spyder is the wrong way to go as it leaves runaway background processes running, even after restarting Spyder.
I got the recommendation to only launch my *.py code from the command prompt. Furthermore I was told to do this:
set FLASK_APP=main1.py then set FLASK_DEBUG=1 then flask run
though I'm not sure what that does, so I will investigate. I was about to restart my computer as a last ditch effort until I looked in my Windows Task Manager and found some Python tasks running. After [end task] them both I was able to launch the updated webpage on my local host.

How to remote debug in PyCharm

The issue I'm facing right now:
I deploy Python code on a remote host via SSH
the scripts are passed some arguments and must be ran by a specific user
the PyCharm run/debug configuration that I create connects through SSH via a different user (can't connect with the user that actually runs the scripts)
I want to remote debug this code via PyCharm...I managed to do all configuration, I just get permission errors.
Are there any ways on how I can run/debug the scripts as a specific user (like sudo su - user)?
I've read about specifying some Python Interpeter options in PyCharm's remote/debug configuration, but didn't manage to get a working solution.

If you want an easy and more flexible way to get into the PyCharm debugger, rather than necessarily having a one-click "play" button in PyCharm, you can use the debug server functionality. I've used this in situations where running some Python code isn't as simple as running python ....
See the Remote debug with a Python Debug Server docs for more details, but here's a rough summary of how it works:
Upload & install remote debugging helper egg on your server (On OSX, these are found under /Applications/PyCharm.app/Contents/debug-eggs)
Setup remote debug server run configuration: click on the drop-down run configuration menu, select Edit configurations..., hit the + button, choose Python remote debug.
The details entered here (somewhat confusingly) tell the remote server running the Python script how to connect to your laptop's PyCharm instance.
set Local host name to your laptop's IP address
set port to any free port that you can use on your laptop (e.g. 8888)
Now follow the remaining instructions in that dialog box: copy-paste the import and pydevd.settrace(...) statements into your code, specifically where you want your code to "hit a breakpoint". This is basically the PyCharm equivalent of import pdb; pdb.set_trace(). Make sure the changed code is sync'ed to your server.
Hit the bug button (next to play; this starts the PyCharm debug server), and run your Python script just like you'd normally do, under whatever user, environment etc. When the breakpoint is hit, PyCharm should drop into debug mode.

I have this (finally) working with ssh RemoteForward open, like so:
ssh -R 5678:localhost:5678 user#<remotehost>
Then start the script in this ssh session. The python script host must connect to localhost:5678 and of course your local pycharm debugger must listen to 5678
(or whatever port you choose)

to keep the script running even after internet connection goes off

I had putty on one server and run a python script available on that server. That script keep on throwing output on terminal. Later on, my internet connection went off but even then i was expecting my script to complete it job as script is on running on that server. But when internet connection resumed, I found that script has not done its job.
So is this expected ? If yes, then what to do to make sure that script runs on server even though internet connection goes off in-between?
Thanks in advance !!!

You should use screen which will let you "detach" your process from the actual terminal you're in.

On the server, you can install tmux or screen. These programs run the program in the background and enable you to open a 'window', If I use tmux:
Open tmux: tmux
Detach (run in background): press Ctrl-b d
reattach (open a 'window'): tmux attach

File disappears when not ssh'd

So I have tornado server setup on my vps running ubuntu 12.04. So when I am ssh'd into my server or am vnc'd in there the site loads static/templates files just fine. But when I exit out of ssh or terminate vnc python throws error that the file it was looking for does not exist.
[Errno 2] No such file or directory
When I execute the server I just run the python command to run it as a background process, and once its successfully running and exit out.
I have the server running at www.calapp.manangandhi.com
Edit: As per the answer below I was able to figure out a way for it to work. here si the link to daemonizing tornado application, there are other ways suggested in the thread as well. https://groups.google.com/forum/?fromgroups=#!topic/python-tornado/4cxKEFsS0RE

Are you trying to say that you run the server from within the ssh shell? If so, your problem is most likely that on shutdown of the shell, the software gets a HUP and disconnects despite being in the background. You need the software to daemonize and detach completely from the running terminal. If you're using a toolkit, look up "starting as daemon" or launch your software from within DJB's supervise or other system-wide launcher system.