3 Lines of Python Code to Write A Web Server. Go to the command line and run the Python script. Python pyserver.py. You will see nothing comes out in the stdout. Sep 13, 2018 hey there, i think u can try simply add 'code-runner.executorMap.python': 'python3 -u' to the user settings and it should work. It says 'Unknown configuration setting'. Type “Python” and click the “IDLE(Python 3.7 32 bit)” to open the Python shell. Create a Python file with.py extension and open it with the Python shell. The file looks like the image given below. It contains the simple Python code which prints the text “Hello World!”. In order to execute the Python code, you have to open the ‘run’ menu and press the ‘Run Module’ option. You can also use the keyboard shortcut ‘F5’ to run the Python code.

The Short Explanation¶

To make your project be single-source Python 2/3 compatible, the basic stepsare:

1. Only worry about supporting Python 2.7

2. Make sure you have good test coverage (coverage.py can help;python-mpipinstallcoverage)

3. Learn the differences between Python 2 & 3

4. Use Futurize (or Modernize) to update your code (e.g. python-mpipinstallfuture)

5. Use Pylint to help make sure you don’t regress on your Python 3 support(python-mpipinstallpylint)

6. Use caniusepython3 to find out which of your dependencies are blocking youruse of Python 3 (python-mpipinstallcaniusepython3)

7. Once your dependencies are no longer blocking you, use continuous integrationto make sure you stay compatible with Python 2 & 3 (tox can help testagainst multiple versions of Python; python-mpipinstalltox)

8. Consider using optional static type checking to make sure your type usageworks in both Python 2 & 3 (e.g. use mypy to check your typing under bothPython 2 & Python 3; python-mpipinstallmypy).

Note

Install Python 3

Note: Using python-mpipinstall guarantees that the pip you invokeis the one installed for the Python currently in use, whether it bea system-wide pip or one installed within avirtual environment.