James Hutchison <[email protected]> added the comment:
For starters, this would be most efficient implementation:
def unique(varname, value, scope):
assert(not varname in scope);
scope[varname] = value;
Usage:
unique('b', 1, locals());
print(b);
But you can't put that in a loop else it will false trigger. Ideally this
wouldn't false trigger. This could be done by having python internally
associate a line number with each explicit variable declaration.
Anyways, an external python function would be too slow for my use case.
Likewise, since it would be something you could use a lot, it should be
implemented in the underlying C code to give it minimal overhead.
Keeping functions small is very impractical at times. I shouldn't create 50
randomly named one use functions in my class as a safeguard against accidental
overwriting when I have a legitimately complicated piece of code that can't be
dissected without becoming unreadable. In many cases I might need 8 or 9 locals
at a time in a single line in each loop section.
I don't see how this is the area of pylint/pyflakes at all. The idea is to make
it so the human doesn't have to carefully inspect their code in order to decide
if they made a mistake or not. Inspecting a long list of warnings is no better,
and arguably I could pull up a bunch of python language design decisions and
ask why they were made if pylint/pyflakes exists.
If such a change would have be implemented after much consideration and
discussion, I don't see how closing my post helps accomplish that.
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<http://bugs.python.org/issue13678>
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