Is python3.x fully compatible with python2.x?

Is python3.x fully compatible with python2.x?

It can be said that it is completely incompatible.

The 3.0 version of Python is often called Python 3000, or Py3k for short. Compared with earlier versions of Python, this is a major upgrade. In order not to bring too much burden, Python 3.0 was not designed with backward compatibility in mind.

Many programs designed for earlier Python versions cannot run properly on Python 3.0.

In order to take care of existing programs, Python 2.6 is a transitional version, which basically uses the syntax and libraries of Python 2.x, while considering the migration to Python 3.0, allowing the use of some Python 3.0 syntax and functions.

New Python programs are recommended to use the syntax of Python 3.0 version.

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