PySerial App runs in shell, by not py script

Question

I have a very simple python script that uses pySerial to send data over the serial port to my Arduino. When I execute this line-by-line in the python shell, it works just f

Answer 1

OK, I've figured it out!

It's necessary to use code like this before performing the write:

time.sleep(1)
ser.setDTR(level=0)
time.sleep(1)

Otherwise, the arduino automatically resets upon receiving a serial connection for some reason. yay!