Since Python 3 the interpreter will halt when detecting mixed whitespace, forcing the programmer to deal with it. https://www.python.org/dev/peps/pep-0008/#tab

Since Python 3 the interpreter will halt when detecting mixed whitespace, forcing the programmer to deal with it. https://www.python.org/dev/peps/pep-0008/#tabs-or-spaces https://www.python.org/dev/peps/pep-0008/#tabs-or-spaces