[Python-il] [pyweb-il:1050] Python coding question

cool-RR cool-rr at cool-rr.com
Thu Jul 1 17:39:15 IDT 2010


Wow, this is pretty cool.

For what it's worth, Mathematica does a bit of this. (But it's not really
like Python.)

On Thu, Jul 1, 2010 at 4:35 PM, Dov Grobgeld <dov.grobgeld at gmail.com> wrote:

> The use of assigment through left arrow (←) would solve this. Which reminds
> me of the fact that I would have loved having a language like python that
> uses more of unicode for its syntax.
>
> Then "python" might look like:
>
>     ∀ n ∈ names:
>       if n ≠ "foo":
>         α ← n
>         ß = re∘search〈"foo", α〉
>
> No more overloading of parens, decimal dots, minus signs, etc.
>
> Of course it would take some time to learn how to type all these chars on
> the keyboard, but by some clever editors macro tricks, you would quickly get
> over this.
>
> Here's another pythonic construct that imo would look nicer.
>
>     f← λ x: x↑2
>     a←f〈2〉
>
> But I'm dreaming. Nobody will ever do anything as crazy as this... ☺
>
> Cheers,
> Dov
>
> On Thu, Jul 1, 2010 at 15:28, Amit Aronovitch <aronovitch at gmail.com>wrote:
>
>>
>>
>>>
>>> On Thu, Jul 1, 2010 at 2:48 PM, Ahik Man <ahik.man at gmail.com> wrote:
>>>
>>>> What do you think about this code:
>>>>
>>>> for n in range(2, 10):...     for x in range(2, n):...         if n % x == 0:...             print n, 'equals', x, '*', n/x...             break...     else:...         # loop fell through without finding a factor...         print n, 'is a prime number'
>>>>
>>>>
>>>> I don't like this 'for - else' trick. IMHO it's confusing and not
>>>> readable.
>>>>
>>>>
>> ‎I really like this (very natural) programmatial construct.
>> I use it all the time, and feel handicapped in languages such as C, where
>> you have to define an extra boolean flag and manually set/check it to
>> achieve the same result.
>>
>>   As for the choice of keywords, it is not that bad (maybe just got used
>> to it after years of usage), but I agree the semantics might not be obvious
>> to unaware readers. Certainly not up to Python's praised readability
>> standards.
>>   Personally, I don't like the choice of '=' as the syntactical marker for
>> name-binding. It makes people think it is an operator, and expect c-like
>> semantics. Source of endless bugs for newbies and repeated misunderstandings
>> in mailing lists.
>>
>>  Well, the advantage of having a BDFL is that someone is in charge of
>> making such choices and we do not have to argue about this any more. Only
>> other option is to try to keep everyone happy by supporting several versions
>> of the syntax (works fine in Perl, but takes its toll in readability and/or
>> learning-curve).
>>
>>    AA
>>
>>
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>
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-- 
Sincerely,
Ram Rachum
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