On 26 May, 2011, at 13:15, Serge Hulne wrote:

It is my feeling that without such a tool Python is inherently very vulnerable to glitches occurring at editing time:
    1. Copy / paste glitch that passes unnoticed, does not generate an exception but alters the logic of the program.
    2. Tab key inadvertently hit.
    3. Difficulty in assessing the target indentation level when a part of a bloc has to be pasted in a different part of the code.
You seem to be arguing for the addition of block delimiters to the language (even if only in comments), you might want to try "from __future__ import braces".