what to do if moudle not in pip3 only in pip2?

[snippsat]

You have a old module it switch to in error message /usr/lib/python3/dist-packages/serial/
It start at /home/pi/.local/lib/python3.7 then should not switch to /usr/lib/python3/
So delete this serial folder to,or use virtual environment to avoid this.

[korenron]

but I deleate it before ?
like you told me in the previous post

or did I miss something?

[snippsat]

but I deleate it before ?
like you told me in the previous post

If you look at error message so is path not the same,you have two Python 3 version.
So /usr/lib/python3/ is the old version that comes with OS.
Then i guess you have installed a newer version at /home/pi/.local/lib/python3.7
When run it switch to try using serial that have been installed for old Python 3.

rm -r /usr/lib/python3/dist-packages/serial/

[korenron]

I'm sorry
I'm not that string in Linux
so again just to be sure:

remove the old foldet

rm -r /usr/lib/python3/dist-packages/serial/

then I need to install something ?

because this is what I'm getting:

pi@raspberrypi:~ $ sudo rm -r /usr/lib/python3/dist-packages/serial/
pi@raspberrypi:~ $ python3 GetAllData_test.py
Traceback (most recent call last):
  File "GetAllData_test.py", line 6, in <module>
    import serial
ModuleNotFoundError: No module named 'serial'

Thanks ,

[snippsat]

then I need to install something ?

You try again and see if error message change.

[korenron]

pi@raspberrypi:~ $ sudo rm -r /usr/lib/python3/dist-packages/serial/
pi@raspberrypi:~ $ python3 GetAllData_test.py
Traceback (most recent call last):
  File "GetAllData_test.py", line 6, in <module>
    import serial
ModuleNotFoundError: No module named 'serial'

[snippsat]

If you do from command line:

which python3 
pip3 -V

What dos it output?
There is some mess in your python version setup.
As show virtual environment could solve this,i did take me 1-min to do this.

[korenron]

which python3
/usr/bin/python3
pi@raspberrypi:~ $ pip3 -V
pip 18.1 from /usr/lib/python3/dist-packages/pip (python 3.7)

I didn't do\remove anything
this is a freash installtion of PI
* the only think I have done it what you told me and also download using pip3 the needed packages

[snippsat]

When you do python3 you are using the old version.
When install you are installing to new Python 3.7 version.
Test with:

python3.7 -V 

Then when run need always to use.

python3.7 GetAllData_test.py

[korenron]

 python3.7 -V
Python 3.7.3

and still dones't work

python3.7 GetAllData_test.py
Traceback (most recent call last):
  File "GetAllData_test.py", line 6, in <module>
    import serial
ModuleNotFoundError: No module named 'serial'

*** up until now on all the codes I wrote , I only used python3 in the command line - and it works