Conversion of Python 2.7 to Python 3.X under Ubuntu

Conversion of Python 2.7 to Python 3.X under Ubuntu

Since Ubuntu itself comes with Python 2.7, and Python 3.X is a lot different from 2.7, there are many inconveniences when using Python 3.X. So here's the record under Ubuntu

Python 2.7 Conversion with Python 3.X method:

Download Python3 First

sudo add-apt-repository ppa:fkrull/deadsnakes# Add a source sudo apt-get  update# update the source list to get the latest version of sudo apt -Get install python3# using apt-get for installation

However, the default Python version is still python 2.7

Change to Python 3.x:

The first method:

Using alias aliases, add the following statement to ~/.bashrc or~/.bash_aliases

Alias Python=python3

The second method:

sudo rm/usr/local/bin/-s/usr/bin/python3. 4 /usr/local/bin/python

The default path for Python after running the above two commands is Python 3.4.3.

So how do you change it back? Similarly:

sudo rm/usr/local/bin/-s/usr/bin/python2. 7 /usr/local/bin/python

If you encounter other problems, need to repair, re-download it:

sudo apt-get install--reinstall python-minimalsudo apt-get install--reinstall python2. 7

Conversion of Python 2.7 to Python 3.X under Ubuntu