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    <p>Python:</p> <p>I am still a moderate user for python, so my complaints might just well be lock of knowledge or mis-usage. Comments are welcome. I do love this language.</p> <ol> <li>Poor thread support and GIL. If you'd like to take use of multicore platform, most of the python programmers would probably recommend multiprocessing or some sort, don't use threading. It wouldn't give you the performance you are expecting.</li> <li>property only for instance variable. _class_var = property(classmethod(some_method)) just wouldn't work. How can I get a property wrapped class variable?</li> <li>no access control. All access controls are syntax mangling. Like private is __private, protect is _protected, etc... And hope that everyone programs python follows the naming convention. Come on, we can do better than that.</li> <li>I agree the python philosophy of being simple and clear syntax but some simple and clear syntax not being supported seems lock of good judgement, in my opinion. Such as, a++, ++a, a-- and --a, self-de/increment, what's wrong with those? foo = (a > b ? a : b) unary operation, what's wrong with those? (I know py2.6 has something similar introduced, but given the massive support of almost every other language for those simple syntax, why reinventing the wheel? why not just follow the best practice? Shouldn't a good thing just keep in its good "form"?)</li> <li>Program to interface. Python has no interface or abstract class concept (py3k has something called abc), everything is concrete. Providing an "interface" or "abstract" keyword to build class skeleton and guard class inheritance and extension wouldn't be a bad idea I think. It helps on top-down design. Currently, I just have to fill the each of methods with NotImplementedError, quite a tedious job.</li> <li>I have to add this. version less than 3.x has str and unicode types. This is a true nightmare. It makes ascii and non-ascii/unicode mixing most likely to fail (bad, bad)</li> </ol> <p>I saw people complains about speed. I don't get that. Its an interpret language, code not compile to machine code until runtime, that's just the nature of it. You can't compare speed from an interpret language to a compiled one. As far as I can see, among the interpret/scripting languages, python isn't slow.</p>
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    1. POWhat are five things you hate about your favorite language?
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    1. CO4. You miss both ++a *and* a--? Heavens... If you get those, may I have inline assembler back please? 6. Ah, you're only used to 7-bit ASCII I take it. The mixing of ASCII and unicode *will* bite you sooner or later, badly, and in a way hard to debug. Explicit is very much better than implicit in this case.
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    2. COagreed. that's why I said its a nightmare because you can't 100% sure when you are dealing with pure ascii and when you are dealing with unicode. Luckly is that py3k treats them all unicodes with utf-8 encoding as default (instead of ascii). And that, we are all talking about just unicodes... ++/-- do not seem to be very evil to me.. :) short than i += 1. the thing is i += 1 is a statement which can't be used in expression, where ++/-- is expression.
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    3. COfor #4: foo = a if a>b else b --That probably looks better when surrounded by parenthesis. I like that syntax because you can read it as "foo equals a if a is greater than b, else b", foo = (a > b ? a : b) is harder to decipher.
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