I made a software synchronizing every 2 seconds files from the network through SSH using Paramiko library.

The software works normally on Linux and Windows 32 and 64 bits (never tried on Mac).

At the office, I use Windows XP 32 bits:
By comfort I made a link on the desktop pointing to the __init__.py file. I had no problems. Then I switched the extension file to .pyw.
The files are not synchronized every 2 seconds anymore but typically some time after 5 minutes. At the restart the files are immediately detected and synchronized.

The software runs multiples threads and processes.

I tryed to update Python interpreter but the bug remains.

Unless you give more information, this is unlikely to be a bug in Python.

- Is your program running with Python 2?
- When it runs as a .py file, does it print to the console?
If both answers are yes, keep in mind that there is no console with a .pyw file, and the program will hang when some sys.stdout or sys.stderr buffer is full.
In this case, you could try Python 3 instead, or simply redirect sys.stdout and sys.stderr to a disk file.

It seems like you’re right. 
I redirect the sys.stdout and the problem is solved. 

Thank you for your help.