Is there a way to get Revit Python Shell not to buffer the print statement?

Is there a way to get Revit Python Shell not to buffer the print statement?

For example, with this code, it is clear to see that RPS will not show anything on the screen until after the loop has finished. Which I am assuming is the result of RPS buffering the output of the print statement.

for i in range(1, 100):
  print i
  time.sleep(1)

While this OK for most things I work on, this behavior will not work for this project...

Here is a quick overview of the project code:

Start ACC (AcCoreConsole) program using popen
for file in filelist:
  send file name to ACC for processing via the input Pipe (a file)
  read results from ACC via the output Pipe (a file).
  (the above steps are working ok)
  print results to Revit Python Shell's screen.
Close ACC

Again nothing shows on the RPS's screen until after the loop is done.

If I can not shut down or reduce the buffering, perhaps there is a different approach I could use? Maybe something other than "print"? Or perhaps, a dedicated output window?

Sincerely; Michelle

Try one of following methods,

1. Use the RPS output window directly:

   from rpw.ui.forms import Alert
   import time
   
   for i in range(1, 100):
       Alert('Processing: {}'.format(i))  # Shows a popup for each iteration
       time.sleep(1)
   

   Write to the Revit journal file:

   from Autodesk.Revit import UI
   import time
   
   uidoc = __revit__.ActiveUIDocument
   
   for i in range(1, 100):
       UI.TaskDialog.Show("Status", "Processing: {}".format(i))
       time.sleep(1)
   

2. For Your Specific ACC Project

   Try this approach

   import sys
   import subprocess
   import time
   
   # Start ACC process with unbuffered output
   acc_process = subprocess.Popen(['AcCoreConsole.exe'], 
                                 stdin=subprocess.PIPE,
                                 stdout=subprocess.PIPE,
                                 stderr=subprocess.PIPE,
                                 bufsize=0,  # No buffering
                                 universal_newlines=True)
   
   for file in filelist:
       # Send to ACC
       acc_process.stdin.write(file + '\n')
       acc_process.stdin.flush()
   
       # Read output
       while True:
           output = acc_process.stdout.readline()
           if output == '':
               break
           print(output.strip())
           sys.stdout.flush()
   
       time.sleep(0.1)  # Small delay if needed
   
   acc_process.stdin.close()
   acc_process.terminate()
   

3. creating a modeless form:

   from rpw.ui.forms import FlexForm, Label, Button
   import clr
   clr.AddReference('System.Windows.Forms')
   from System.Windows.Forms import Form, TextBox, DockStyle, FormBorderStyle
   
   output_form = Form()
   output_form.Text = "Processing Output"
   output_form.Width = 600
   output_form.Height = 400
   
   text_box = TextBox()
   text_box.Multiline = True
   text_box.Dock = DockStyle.Fill
   text_box.ScrollBars = System.Windows.Forms.ScrollBars.Vertical
   output_form.Controls.Add(text_box)
   
   output_form.Show()
   
   for i in range(1, 100):
       text_box.AppendText("Processing item {}\n".format(i))
       System.Windows.Forms.Application.DoEvents()  # Keep form responsive
       time.sleep(1)