Repeat request by else

[stsxbel]

Good afternoon, there is a code that removes parameters, the request is made 2 times and if the answers match, the data is written to the database. I did not have any problems with this, if the data is not equal - it is printed (the data is not equal) and the program ends. Tell me, how to send the request again under the else condition?

ser = serial.Serial( port='/dev/ttyUSB0', baudrate=9600, timeout=1, parity=serial.PARITY_NONE, stopbits=serial.STOPBITS_ONE, bytesize=serial.EIGHTBITS) cmd = bytearray([0x1]) ser.write(cmd) reply = ser.read(22) out = reply[11:16] print(out) time.sleep(0) cmd = bytearray([0x1]) ser.write(cmd) reply = ser.read(22) out2 = reply[11:16] print(out2) if out == out2:	cursor = connection.cursor()	sql = "Update silos1 set weight = %s, date = %s where id = %s "	datetime.strptime("12/31/2000", "%m/%d/%Y")	newHireDate = datetime.today() rowCount = cursor.execute(sql, (out, newHireDate, 1 ) )	connection.commit()	print ("ok", newHireDate) else:	print ("data is not correct") connection.close() 

[deanhystad]

You need a loop to repeat sending the request until the responses match. I do not know enough about your process to know what code belongs inside the loop and what needs to be done if there out and out2 don't match. Here's a guess.

# missing inports def write_command(ser, cmd): """Avoid duplicate code""" ser.write(cmd) reply = ser.read(22) out = reply[11:16] print(out) return out ser = serial.Serial( port='/dev/ttyUSB0', baudrate=9600, timeout=1, parity=serial.PARITY_NONE, stopbits=serial.STOPBITS_ONE, bytesize=serial.EIGHTBITS) cmd = bytearray([0x1]) while True: out = write_command(ser, cmd) time.sleep(0) out2 = write_command(ser, cmd) if out == out2: cursor = connection.cursor() sql = "Update silos1 set weight = %s, date = %s where id = %s " datetime.strptime("12/31/2000", "%m/%d/%Y") newHireDate = datetime.today() rowCount = cursor.execute(sql, (out, newHireDate, 1 ) ) connection.commit() print ("ok", newHireDate) break print ("data is not correct") connection.close() # Do you want to do this?

[stsxbel]

You need a loop to repeat sending the request until the responses match. I do not know enough about your process to know what code belongs inside the loop and what needs to be done if there out and out2 don't match. Here's a guess.

# missing inports def write_command(ser, cmd): """Avoid duplicate code""" ser.write(cmd) reply = ser.read(22) out = reply[11:16] print(out) return out ser = serial.Serial( port='/dev/ttyUSB0', baudrate=9600, timeout=1, parity=serial.PARITY_NONE, stopbits=serial.STOPBITS_ONE, bytesize=serial.EIGHTBITS) cmd = bytearray([0x1]) while True: out = write_command(ser, cmd) time.sleep(0) out2 = write_command(ser, cmd) if out == out2: cursor = connection.cursor() sql = "Update silos1 set weight = %s, date = %s where id = %s " datetime.strptime("12/31/2000", "%m/%d/%Y") newHireDate = datetime.today() rowCount = cursor.execute(sql, (out, newHireDate, 1 ) ) connection.commit() print ("ok", newHireDate) break print ("data is not correct") connection.close() # Do you want to do this?

thanks a lot. It turned out even better than I wanted.