Python attributeError：模块“ serial”没有属性“ Serial”

Question

I am using Python3 in Windows 7 and I installed pyserial 3.3. I create a file named serial.py with these line codes:

import serial

ser = serial.Serial('COM4', 9600, timeout=0)
ser.write(b'mymessage')

it will show this error message:

attributeError: module 'serial' has no attribute 'Serial'

for all other samples in their documentation it's same, and I could not use any of them.

Answer 1

Hah!
the problem was my filename. I was using same file name with my python package!
I changed my filename from serial.py to test.py and it start working.