Problems I Have with Python

Post by camel_Snake » Wed, Jan 25, 2017, 5:43 PM UTC

darkf wrote: post #110

toyg wrote: post #61

This is a tired, trolling post. Most of these issues have long been addressed as non-problems or personal preferences; when the author says "Incompetence? Politics?" what I hear is "people don't listen to me, probably because I don't know what I'm talking about". The attitude is confirmed by his/her conflating of stdlib gripes and language gripes - two very different sets of problems - and mixing requests for speed w…

Sorry, I didn't write it for people who lack reading comprehension! I'll remember your ilk in the next post.

Post by bb88 » Wed, Jan 25, 2017, 5:54 PM UTC

ufo wrote: post #68

Shizka wrote: post #60

Earlier quoted context omitted.

But doesn't this just happen because n is a pointer? What would you expect it to print? 1,2,3,4?

In Lua it prints 1,2,3,4. It has to do with each loop iteration behaving as if it declared a different variable instead of sharing the same variable across the loop. Anyway, the problem they were talking about is clearer when you are closing over stuff that other than the loop variable: fns = [] for n in [1,2,3,4]: x = n*10 def fn(): print(x) fns.append(fn)

    def x(y=[]):
        y.append(1)
        return y

    for z in range(4):
        print x()

Post by BuuQu9hu » Wed, Jan 25, 2017, 5:56 PM UTC

darkf wrote: post #21

lmm wrote: post #19

Python's semantics are unlikely to ever be fast and most Python users have already worked around its speed issues. asyncio is new; python3 porting is happening. It seems unfair to complain that no real improvements are being made and also complain that these new things are immature. reduce being pushed behind an import is stupid, but it's only one import. lambda is fine, if you're writing in functional style you're u…

>lambda is fine, if you're writing in functional style you're using expressions for everything anyway. No, I /really would/ like to be able to write: foo.on_click(lambda: x += 1) The language not supporting this (when most others do) is just silly.

  foo.onClick(fn { x += 1 })

Post by protomok » Wed, Jan 25, 2017, 6:00 PM UTC

Post by dagenleg » Wed, Jan 25, 2017, 6:07 PM UTC

Pxtl wrote: post #121

jknoepfler wrote: post #112

I don't understand the desire to turn python into a high performance language. It's 2017, if you want performance just write some go/cpp/rust. If you want to leverage an old and very mature concurrency framework, use elixir/erlang. If you need a giant data integration framework, use java. If you want a stellar bash replacement, use python. Know your tools, don't bloat them with unnecessary crap. (The list was not int…

Because other high-performance languages have been improving their readability and expressiveness. Personally, my tool of choice is C# right now. I find it quite readable, and every bit as expressive as python - even moreso, plus it has the performance advantages of being designed from square 1 as a compiled language instead of an interpreted one. It has async/await, it has functional features that Guido hates, it ha…