Enforce “spaces” or “tabs” only in python files?

Question

In Python, is there a mean to enforce the use of spaces or tabs indentation with a per file basis ?

Well, perhaps \"enforce\" is too strong, more like a \"recommend

Answer 1

As explicited in PEP 8, never mix tabs and space. However, a file with both may just run... As it says there:

The most popular way of indenting Python is with spaces only.  The
second-most popular way is with tabs only.  Code indented with a mixture
of tabs and spaces should be converted to using spaces exclusively.
When invoking the Python command line interpreter with the -t option, it issues
warnings about code that illegally mixes tabs and spaces.  When using -tt
these warnings become errors.  These options are highly recommended!

the solution is therefore to use as a default:

python -t my_mixed_code.py

To answer at the editor level, this depends on the editor, please specify!