如何解决 AttributeError：模块 'serial' 在 pyserial 中没有属性 'Serial'？

Question

I have a Windows 10 with Python 3.7.4 and I use Jupyter Notebook. I'm trying to use pySerial to connect to my Arduino by Serial attribute. I tried installing pySerial simply by pip install pyserial and eventually I tried conda install -c conda-forge pyserial too, but when I try to run my code:

 import serial
 ser = serial.Serial('COM4', 9600)

I get an error message like:

AttributeError                            Traceback (most recent call last)
<ipython-input-7-413d0d9dabe7> in <module>
      2 import serial
      3 import time
----> 4 ser = serial.Serial('COM4', 9600)
      5 
      6 # Your Account Sid and Auth Token from twilio.com/console

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

Also, I tried

import serial
serial.__file__

And I got 'C:\Users\lippe\Anaconda3\lib\site-packages\serial\__init__.py' as output.

I also tried dir(serial) and I can't see the Serial attribute in the output, so I think it's basically not installed and I don't know why. I tried digging the internet but I still can't find a solution.

Answer 1

Make sure you're importing the right serial. After installing pyserial with pip, you can use the __file__ attribute to check that it's the one I expect like so:

>>> import serial
>>> serial.__file__
'/usr/local/lib/python3.7/site-packages/serial/__init__.py'

Other answers suggest it might work to import the class directly with

from serial import Serial

But I'm not sure why this would matter if you're importing the latest published on pypi.