communication between server and matrix process working

server.py

@@ -12,9 +12,10 @@ import os
 import datetime
 import threading
 import csv
-
-
-stock_ticker = StockTicker()
+import pexpect
+from multiprocessing import Process
+from subprocess import Popen, PIPE
+#stock_ticker = StockTicker()
 
 command = 300
 tickerList = 0
@@ -26,6 +27,13 @@ LOGO_FOLDER = 'logos/'
 CSV_FOLDER = 'csv/new/'
 ALLOWED_EXTENSIONS = {'csv', 'png'}
 
+#ticker.stdin.write(b'from server')
+#print(ticker.stdout.readlines())
+#(output, errs)
+child = pexpect.spawn("sudo -E python3 stockTicker.py")
+
+#stock_ticker = StockTicker()
+
 def allowed_file(filename):
     return '.' in filename and filename.rsplit('.', 1)[1].lower() in ALLOWED_EXTENSIONS
 
@@ -38,7 +46,7 @@ def process_file(path, filename):
 
 def ShutdownPI():
     print('SHUTTING DOWN')
-    os.system("sudo shutdown --poweroff")
+    os.system("sudo shutdown now")
 
 app = Flask(__name__)
 @app.route("/", methods=['GET', 'POST'])
@@ -128,14 +136,27 @@ def matrix():
    global LastCommand
    if "Run Display" in request.form:
         pass
+        print('run display')
         #stock_ticker.runStockTicker(command, DelayTime, speedTime)
-        stock_ticker.displayMatrix()
+        #stock_ticker.displayMatrix()
+        #os.system("sudo -E python3 test.py")
+        #
+        #child.sendline('sent from server')
+        
+        #process = Popen(["sudo", "-E",  "python3",  "stockTicker.py"], stdin=PIPE, stdout=PIPE, stderr=PIPE)
+        child.sendline('R')
+        
+        print('back in flask')
+        
+        
         LastCommand = 'Run display'
    elif "Stop Display (at next refresh)" in request.form:
         pass
+        #ticker.kill()
         try:
-            stock_ticker.stopStockTicker()
+            #stock_ticker.stopStockTicker()
             LastCommand = 'Stop display at next checkpoint'
+            child.sendline('K')
         except:
             print("none running")
    elif "Shutdown the pi" in request.form:
@@ -148,6 +169,6 @@ def matrix():
    return hello()
 
 if __name__ == "__main__":
-   app.run(host='0.0.0.0', port=1024, debug=True)
+   app.run(host='0.0.0.0', port=1024, debug=False) # the debuggger causes flickering 
    
    #sudo ./demo -D1 final.ppm -t 50 -m 25 --led-gpio-mapping=adafruit-hat --led-rows=32 --led-cols=256 --led-slowdown-gpio=4