[Python-ideas] float('∞')=float('inf')
Joshua Landau
joshua at landau.ws
Fri Jul 12 20:07:07 CEST 2013
On 12 July 2013 18:21, Alexander Belopolsky
<alexander.belopolsky at gmail.com> wrote:
>
> On Fri, Jul 12, 2013 at 12:15 PM, Joshua Landau <joshua at landau.ws> wrote:
>>
>> > I would actually support the idea for float() to accept whatever
>> > unicodedata.numeric() accepts.
>>
>> It doesn't free us from tons of special cases. We already have people
>> arguing over whether 3½ is the traditional 3.5 or whether it's 1.5.
>> We'll need tons of new parsing rules. I'm not convinced, in other
>> words.
>
>
> I should have explained my idea in more detail. I am not suggesting that
> float('3½') should work. I wrote: "float() to accept whatever
> unicodedata.numeric() accepts" and
>
>>>> unicodedata.numeric('3½')
> Traceback (most recent call last):
> File "<stdin>", line 1, in <module>
> TypeError: need a single Unicode character as parameter
>
> Since python does not have a character type, I think it is acceptable for
> single-character strings to be special.
For reference, you want to define these:
៲: 2 ᛰ: 19 𝍱: 90 ៶: 6 ⓴: 20 ൵: 3/4 ⅞: 7/8 ፹:
80 ⑿: 12 ⅽ: 100 𐅱: 1000 𑁜: 20 Ⅵ: 6 𐹫: 30 仨: 3
𝍩: 10 ⑯: 16 ⓬: 12 Ⅽ: 100 ㉓: 23 〩: 9 ⅕: 1/5 ㉛:
31 ௱: 100 ፵: 40 𐡟: 10000 ⅝: 5/8 什: 10 十: 10 𒑇: 9
𐅅: 500 ㉋: 40 𒑏: 1 𐅍: 1000 零: 0 𐩆: 100 ༱: 15/2
𒐷: 3 𐄓: 40 ㊸: 43 𒐿: 4 ¼: 1/4 𐄛: 300 ㈣: 4
ⅶ: 7
𐌡: 5 〧: 7 𐄥: 4000 幺: 1 廾: 9 𐩾: 50 Ⅳ: 4
𒐯: 3 𐄭: 30000 ㆒: 1 玖: 9 𒐗: 3 ⒔: 13 𐄕: 60
𠬙: 3
𒐟: 2 𐄝: 500 ↂ: 10000 七: 7 ㊀: 1 Ⅱ: 2 〇: 0 ⒄:
17 𣬛: 3 𐆊: 0 ㊈: 9 ᛯ: 18 𒐏: 4 𐄍: 7 𐅲:
5000
𐹰: 80 ៱: 1 ୶: 1/8 ৵: 1/8 ⅺ: 11 陸: 6 ៹: 9 𐭾:
100 ꠰: 1/4 ౼: 1 什: 10 Ⅲ: 3 𝍦: 7 𑁤: 100 Ⅺ: 11
ꛫ: 6 𝍮: 60 ꛨ: 3 ⑬: 13 ⅒: 1/10 ⒂: 15 Ⅹ: 10 𒐴:
1 𒑔: 5 ⅚: 5/6 四: 4 ㉘: 28 𐡞: 1000 𐭞: 100 𒑜:
5/6
𐡜: 20 𐅂: 1 叁: 3 𒑄: 8 𐅊: 50 ⒆: 19 ㉈: 10
六: 6 𐅳: 5 〸: 10 𒑌: 4 𐄲: 80000 ㊳: 38 ꠴: 1/8 ㊻:
46
𒐅: 7 𒐼: 4 ㊿: 50 𐄢: 1000 ㈠: 1 ⅑: 1/9 〤: 4
𐄋: 5 𠤪: 1 ㈨: 9 ⑾: 11 ༮: 9/2 萬: 10000 𐄒: 30
⅙: 1/6
𒐉: 4 𐄖: 70 ⒗: 16 𒐔: 9 ㆕: 4 𐄚: 200 𐅕: 10000
୳: 1/2 𒐜: 8 ൱: 100 ㊃: 4 一: 1 漆: 7 ⒇: 20 𒐄:
6
ↅ: 6 𐄊: 4 ➉: 10 弎: 3 𒐌: 7 ⓲: 18 ፳: 20 ௰:
10 𐭙: 2 零: 0 𐅷: 2/3 ৴: 1/16 ፻: 100 ៸: 8 𐹹:
800
拾: 10 ⅿ: 1000 𑁟: 50 𠃢: 4 𐄪: 9000 壱: 1 ꛦ: 1 Ⅷ:
8 𑁥: 1000 𝍫: 30 𐹩: 10 ꛮ: 9 Ⅿ: 1000 ⑭: 14 ㉑: 21
𐅗: 10 𒑕: 5 ㉜: 32 𐭛: 4 ㉙: 29 Ⅻ: 12 ⅟: 1
𐡝: 100 千: 1000 𐍁: 90 𐅇: 50000 𒑅: 8 ㉉: 20 𐅸: 3/4
𐅰: 500
𒑍: 5 ༳: -1/2 捌: 8 ㊶: 41 ꠵: 3/16 𐹾: 2/3 卅: 30 ㊾:
49 𒐽: 4 𐭹: 2 𐌣: 50 ㈡: 2 𐄧: 6000 〣: 3 〥: 5
༫: 3/2 ㈩: 10 𐄯: 50000 𒐭: 2 ⒒: 11 𒑢: 1/4 𢎐: 2
𐅟: 5 亖: 4 𐄗: 80 ㆔: 3 𒐕: 1 ⒚: 19 ⅳ: 4
𐄟: 700
𠦜: 40 𒐝: 9 ⑽: 10 𐤚: 2 ㊆: 7 𐄇: 1 㐅: 5
三: 3 𐄏: 9 𠦌: 40 𒐍: 8 ⑲: 19 ៳: 3 佰: 100
𐹶: 500
৷: 1/4 ൴: 1/2 ౺: 2 ፸: 70 百: 100 ⅼ: 50 ⳽: 1/2 𑁢:
80 𝍠: 1 Ⅴ: 5 ⑪: 11 𝍨: 9 ꛩ: 4 𐹮: 60 Ⅸ: 9
Ⅼ: 50 ⓭: 13 𒑒: 4 𐏓: 10 ㉖: 26 ⅔: 2/3 ⒃: 16 𐡚:
3 𐡙: 2 𐭘: 1 ㉞: 34 𐅜: 2 𒑂: 7 參: 3 ㈥: 6
陆: 6 𐅬: 500 𐅄: 50 𒑊: 2 贰: 2 ㉎: 70 𐅌: 500
꠲: 3/4 ༰: 13/2 ㊱: 36 ൳: 1/4 ፼: 10000 陸: 6 〺: 30 ㊹:
44
⅐: 1/7 ½: 1/2 𒐢: 5 𐌠: 1 ㈦: 7 𐄤: 3000 㠪: 5
𐄬: 20000 𒐒: 7 ➓: 10 弐: 2 ↉: 0 𐅔: 1000 𐄔: 50
⒕: 14
𐹽: 1/3 𐄜: 400 𒐂: 4 𒑚: 1/3 ㊁: 2 ↇ: 50000 億:
100000000⒅: 18 𒐊: 5 ㊉: 10 ⅘: 4/5 𐄌: 6 𒐧: 5 ௲:
1000 ⑳: 20
⓰: 16 ⅱ: 2 ৶: 3/16 𐹷: 600 ୵: 1/16 ౻: 3 ⅹ: 10 ៰: 0
𐭽: 20 𑁣: 90 𐅡: 10 ⅜: 3/8 𝍥: 6 ៷: 7 ⑫: 12
兩: 2 𐹯: 70 ꛬ: 7 𝍭: 50 柒: 7 𒑓: 4 𐅑: 50
㉗: 27 𑁛: 10 𐅙: 1 ㉟: 35 𐭝: 20 参: 3 𒑃: 7
𐅁: 1/2
𐩇: 1000 𐭻: 4 𒑋: 3 𐅉: 10 ㉏: 80 㭍: 7 𐅩: 50
꠳: 1/16 𐄱: 70000 ፴: 30 ㊴: 39 𒐻: 3 ㊼: 47 𐭸: 1
𒐣: 2
𠄡: 5 ㈧: 8 𒐫: 9 𐄩: 8000 ༭: 7/2 𒐓: 8 廾: 9
𐄑: 20 ⅷ: 8 五: 5 𝍣: 4 𒐛: 7 ⒘: 17 𐄙: 100
𒐬: 1
𒐃: 5 𐄡: 900 𑁡: 70 ↆ: 50 万: 10000 ㊄: 5 𒐋: 6
𐄉: 3 二: 2 弍: 2 ୲: 1/4 ⓳: 19 ⑰: 17 𐤙: 100
𐅶: 1/2
𐅤: 10 ៵: 5 𐭺: 3 𐅝: 2 ౸: 0 ৹: 16 ⅾ: 500 廿:
20 𐹼: 1/4 𝍢: 3 ꛪ: 5 𑁠: 60 𐅦: 50 ꛧ: 2 𐅫:
300
𝍪: 20 ⓫: 11 Ⅾ: 500 ꛯ: 0 𐹬: 40 𒑐: 2 六: 6 ⅖:
2/5 𒑛: 2/3 ㉔: 24 𐏕: 100 𐭚: 3 ᛮ: 17 𐡘: 1 𐅞:
2
⒀: 13 𝍰: 80 𐅯: 500 𒐺: 3 𒑀: 6 ㉊: 30 兆:
1000000000000𐩄: 10 𐍊: 900 𒑈: 9 𐹭: 50 𐅎: 5000 ㉌: 50
陌: 100 ༲: 17/2
貳: 2 𒐰: 4 ㊷: 42 八: 8 ⅓: 1/3 𒐸: 4 亿:
100000000兩: 2 𐌢: 10 𒐠: 3 𐄦: 5000 ㈤: 5 ༪: 1/2 〨:
8 𐄮: 40000
Ⅰ: 1 ⅗: 3/5 ⒓: 12 𒐐: 5 𐤖: 1 𐹱: 90 ⒛: 20
𒐘: 4 𐄞: 600 㒃: 2 𒐀: 2 ↁ: 5000 ㊇: 8 ⅛: 1/8 ⅵ:
6
〦: 6 𒐈: 3 伍: 5 𐄎: 8 〢: 2 ൲: 1000 ⑱: 18 𐹳:
200 ୷: 3/16 ៴: 4 𐹵: 400 𐅆: 5000 ⅻ: 12 ৸: 3/4 ౹: 1
⓾: 10 𐭿: 1000 𐩽: 1 𐅣: 10 𒑡: 1/6 𐹻: 1/2 𝍧: 8
𠫪: 6 ፶: 50 𑁝: 30 ⓮: 14 𝍯: 70 𦉭: 4 𐅓: 500
𒑑: 3
❿: 10 𐹴: 300 𐏔: 20 ㉕: 25 𐅛: 2 𒑙: 2 𐭟: 1000
൰: 10 九: 9 ፺: 90 𒑁: 7 𐅀: 1/4 叄: 3 𐩅: 20 ⅴ:
5
𐅋: 100 𒑉: 9 𐹸: 700 𐡛: 10 ㊲: 37 𐄳: 90000 ꠱: 1/2
𐤗: 10 ㊺: 45 〹: 20 ¾: 3/4 𒑟: 1/8 𐄣: 2000 𒐡: 4
𐅭: 500
𐄫: 10000 𒐩: 7 貮: 2 ༯: 11/2 𝍡: 2 𐅧: 50 𒐑: 6
⒖: 15 𐅚: 1 ⑩: 10 𐤛: 3 𢦘: 3 𒐙: 5 ⅲ: 3
𒑠: 1/4
𐅏: 5 ㊂: 3 𒐚: 6 ↀ: 1000 𠀁: 7 肆: 4 Ⅶ: 7 ↈ:
100000 ㉍: 60 拾: 10 𐄘: 90 𐹲: 100 ⅰ: 1 ⓱: 17 𒐪: 8
𠁤: 4 ୴: 3/4 𐹺: 900 ⅸ: 9 壹: 1 ౾: 3 ፲: 10 𠫽:
3 𐅪: 100 𐅠: 10 𒐱: 5 𝍤: 5 ፷: 60 𐹪: 20 𒐥:
3
𐅨: 50 𒐁: 3 ⑮: 15 𐅃: 5 𝍬: 40 ꛭ: 8 ㉒: 22
仟: 1000 𐅐: 10 ㉚: 30 𐅮: 500 𐅘: 1 𒐵: 2 𒑞: 2/3
𐭜: 10
⓯: 15 𒑝: 1/3 ౽: 2 ⒁: 14 𒑆: 9 卄: 20 𐏒: 2
𐅥: 30 𐅈: 5 𒑎: 6 卌: 40 𐅒: 100 𐄰: 60000 𒐹: 5
𒐶: 3
㊵: 40 𒐨: 6 𐭼: 10 阡: 1000 𒐾: 4 𑁞: 40 ㊽: 48
㈢: 3 𐄠: 800 𐏑: 1 𒐦: 4 𐅢: 10 𐅖: 50000 𐄨: 7000
𒐮: 3
༬: 5/2 𒐇: 9 𒐤: 3 ㆓: 2 𐄐: 10 ⒑: 10 𒐖: 2
𐅴: 50 參: 3 𐤘: 20 ⒙: 18 𒐞: 1 𠦃: 30 ㉝: 33
〡: 1
Personally I'm not too sure that ㊱ and ㊱ and co. really deserve to be
parsed...
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