Python AttributeError module object has no attribute Serial

Question

I m trying to access a serial port with Python 2 6 on my Raspberry Pi running Debian  My script named serial py tries to import pySerial   import serial ser   serial Serial   dev ttyAMA0   9600  ser write  hello world      For some reason it refuses to establish the serial connection with this error   AttributeError   module  object has no attribute  Serial    When I try to type the same code in the interactive Python interpreter it still doesn t work   Strangely  it used to work about a couple hours ago   What could be the problem  I ve tried to fix this for a while  installing pySerial again  rewriting my code  double-checking the serial port  etc   Thanks in advance

User · Accepted Answer

You re importing the module  not the class  So  you must write   from serial import Serial   You need to install serial module correctly  pip install pyserial

User · Answer

Yes this topic is a bit old but i wanted to share the solution that worked for me for those who might need it anyway  As Ali said  try to locate your program using the following from terminal      sudo python3  import serial   print serial   file    --  Copy  CTRL D   to get out of python   sudo python3-- paste   init   py  Activating   init   py will say to your program  ok i m going to use Serial from python3   My problem was that my python3 program was using Serial from python 2 7  Other solution  remove other python versions  Cao  Sources   https   raspberrypi stackexchange com questions 74742 python-serial-serial-module-not-found-error 85930 85930  Tryhard

User · Answer

I m adding this solution for people who make the same mistake as I did   In most cases  rename your project file  serial py  and delete serial pyc if exists  then you can do simple  import serial  without attribute error   Problem occurs when you import  something  when your python file name is  something py

User · Answer

If you are helpless like me  try this   List all Sub-Modules of  Serial   or whatever package you are having trouble with  with the method described here   List all the modules that are part of a python package  In my case  the problems solved one after the other      looks like a bug to me

User · Answer

This error can also happen if you have circular dependencies  Check your imports and make sure you do not have any cycles

User · Answer

You have installed the incorrect package named  serial     Run pip uninstall serial for python 2 x or pip3 uninstall serial for python 3 x  Then install pyserial if not already installed by running pip install pyserial for python 2 x orpip3 install pyserial for python 3 x

User · Answer

This problem is beacouse your proyect is named serial py and the library imported is name serial too   change the name and thats all

User · Answer

I accidentally installed  serial   sudo python -m pip install serial  instead of  pySerial   sudo python -m pip install pyserial   which lead to the same error   If the previously mentioned solutions did not work for you  double check if you installed the correct library

[python] Python AttributeError: 'module' object has no attribute 'Serial'

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