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a gift function and a question

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  a gift function and a question Mohsen Pahlevanzadeh <mohsen@pahlevanzadeh.org> - 2013-09-10 00:40 +0430
    Re: a gift function and a question Steven D'Aprano <steve@pearwood.info> - 2013-09-10 07:01 +0000
      Re: a gift function and a question random832@fastmail.us - 2013-09-10 09:50 -0400
      Re: a gift function and a question Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-09-10 15:11 +0000

#53889 — a gift function and a question

Dear all,

I have a gift for mailing list:

////////////////////////////////
def integerToPersian(number):
    listedPersian = ['۰','۱','۲','۳','۴','۵','۶','۷','۸','۹']
    listedEnglish = ['0','1','2','3','4','5','6','7','8','9']    
    returnList = list()
    
    listedTmpString = list(str(number))
    
    for i in listedTmpString:
        returnList.append(listedPersian[listedEnglish.index(i)])

    return ''.join(returnList)
////////////////////////////////////
When you call it such as : "integerToPersian(3455)" ,  it return ۳۴۵۵,
۳۴۵۵ is equivalent to 3455 in Persian and Arabic language.When you read
a number such as reading from databae, and want to show in widget, this
function is very useful.

My question is , do you have reverse of this function? persianToInteger?

Yours,
Mohsen

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#53906

On Tue, 10 Sep 2013 00:40:59 +0430, Mohsen Pahlevanzadeh wrote:

> Dear all,
> 
> I have a gift for mailing list:
> 
> ////////////////////////////////
> def integerToPersian(number):
>     listedPersian = ['۰','۱','۲','۳','۴','۵','۶','۷','۸','۹']
>     listedEnglish = ['0','1','2','3','4','5','6','7','8','9'] 
>     returnList = list()
>     listedTmpString = list(str(number))
>     for i in listedTmpString:
>         returnList.append(listedPersian[listedEnglish.index(i)])
>     return ''.join(returnList)
> ////////////////////////////////////
> When you call it such as : "integerToPersian(3455)" ,  it return ۳۴۵۵,
> ۳۴۵۵ is equivalent to 3455 in Persian and Arabic language.When you read
> a number such as reading from databae, and want to show in widget, this
> function is very useful.


Thank you Mohsen!


Here is a slightly more idiomatic version of the same function. This is 
written for Python 3:

def integerToPersian(number):
    """Convert positive integers to Persian.

    >>> integerToPersian(3455)
    '۳۴۵۵'

    Does not support negative numbers.
    """
    digit_map = dict(zip('0123456789', '۰۱۲۳۴۵۶۷۸۹'))
    digits = [digit_map[c] for c in str(number)]
    return ''.join(digits)


Python 2 version will be nearly the same except it needs to use the u 
prefix on the strings.



> My question is , do you have reverse of this function? persianToInteger?

The Python built-in int function already supports that:


py> int('۳۴۵۵')
3455


-- 
Steven

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#53916

On Tue, Sep 10, 2013, at 3:01, Steven D'Aprano wrote:
> def integerToPersian(number):
>     """Convert positive integers to Persian.
> 
>     >>> integerToPersian(3455)
>     '۳۴۵۵'
> 
>     Does not support negative numbers.
>     """
>     digit_map = dict(zip('0123456789', '۰۱۲۳۴۵۶۷۸۹'))
>     digits = [digit_map[c] for c in str(number)]
>     return ''.join(digits)

You can support negative numbers if you use digit_map.get(c,c).

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#53920

On Tue, 10 Sep 2013 07:01:20 +0000, Steven D'Aprano wrote:

> On Tue, 10 Sep 2013 00:40:59 +0430, Mohsen Pahlevanzadeh wrote:

>> My question is , do you have reverse of this function?
>> persianToInteger?
> 
> The Python built-in int function already supports that:
> 
> 
> py> int('۳۴۵۵')
> 3455


Oh, I forgot to mention, this works back to at least Python 2.4, provided 
you remember to use Unicode strings rather than bytes:


py> b = '۳۴۵۵'  # This fails.
py> int(b)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: invalid literal for int() with base 10: '\xdb\xb3\xdb\xb4\xdb
\xb5\xdb\xb5'
py>
py> s = u'۳۴۵۵'  # This works.
py> int(s)
3455



-- 
Steven

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