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I have a Pi Zero that needs to use PySerial 3.4. When I run pip freeze, it says pyserial==3.4.

However, in the actual program (Python 3.4.2), when I do import serial and print(serial.VERSION), it says 2.6, which was the previous version installed, and pyserial 3.4 methods do not work.

Before updating PySerial, I also just updated Raspbian OS, so that might have something to do with it, but I am not very sure.

Could someone point me in the right direction? Thanks.

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I should have used pip3 to install instead of pip since I was using Python 3. pip3 freeze was showing pyserial==2.6 but after sudo pip3 install pyserial --upgrade it worked.

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