The specific steps to upgrade python on Raspberry Pi

1、 Install python3

sudo apt install python3

2、 Uninstall python2.7 (optional)

sudo apt remove python

3、 Then execute the following command to automatically clean up python2.7 dependencies

sudo apt autoremove

4、 Delete the original python link

sudo rm /usr/bin/python

5、 Create a new link to the python3.5 just installed

sudo ln -s /usr/bin/python3.5 /usr/bin/python

Content expansion:

Raspberry Pi upgrade Python to 3.6

1. Update Raspberry Pi system

$ sudo apt-get update
$ sudo apt-get upgrade -y

2. Install python dependency environment

$ sudo apt-get install build-essential libsqlite3-dev sqlite3 bzip2 libbz2-dev

3. Download the python3.6 version source code and unzip it

$ wget https://www.python.org/ftp/python/3.6.1/Python-3.6.1.tgz
$ tar zxvf Python-3.6.1.tgz
$ cd Python-3.6.1

4. Compile and install. Since the compilation process is relatively long, we can combine several commands for compiling and installing, so that you can go for a cup of coffee and wait for a while and you will be prompted that the installation is successful.

sudo ./configure && sudo make && sudo make install

5. Establish soft connection

After installing python3.6, we can look at the version of python

pi@raspberrypi:~ $ python --version
Output: Python 3.4.2
pi@raspberrypi:~ $ python3 --version
Output: Python 3.6.1

6. Next, you need to soft link Python 3.6.1 to python, which is convenient to use.

Let's take a look at where python3 and python commands are respectively

pi@raspberrypi:~ $ which python
Output:/usr/bin/python
pi@raspberrypi:~ $ which python3
Output:/usr/local/bin/python3

7. Then establish a soft connection

pi@raspberrypi:~ $ sudo mv /usr/bin/python /usr/bin/python3.4.2 
pi@raspberrypi:~ $ sudo ln -s /usr/local/bin/python3 /usr/bin/python

8. Ok, so the soft connection is successfully established.

Whether the test was successful

pi@raspberrypi:~ $ python --version
Output: Python 3.6.1

OK, you can see that the python on the Raspberry Pi has been successfully upgraded to Python 3.6.1

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