Wrap sys.stdout.flush() in try block

MicroPython does not include sys.stdout.flush()

Author: sfe-SparkFro

examples/qwiic_keypad_ex1.py

@@ -81,8 +81,13 @@ def runExample():
 			else: 
 				print(charButton, end="")
 
-			# Flush the stdout buffer to give immediate user feedback
-			sys.stdout.flush()
+			# Some platforms won't print until newline character, so a flush is
+			# needed to update. However some platforms (eg. MicroPython) don't
+			# include sys.stdout.flush(), so wrap in a try block
+			try:
+				sys.stdout.flush()
+			except:
+				pass
 
 		time.sleep(.25)
 

examples/qwiic_keypad_ex3.py

@@ -140,7 +140,13 @@ def clearEntry(userEntry):
 def printEntry(userEntry):
 
 	print("\rUserEntry:%s" % (''.join(userEntry)), end="")
-	sys.stdout.flush()
+	# Some platforms won't print until newline character, so a flush is
+	# needed to update. However some platforms (eg. MicroPython) don't
+	# include sys.stdout.flush(), so wrap in a try block
+	try:
+		sys.stdout.flush()
+	except:
+		pass
 
 
 if __name__ == '__main__':