CODEWITHSUNDEEP
pythondjangolocalizationarabicindic
Zaman Afzal
Zaman Afzal

Reputation: 2109

I want to convert decimal numbers from western arabic (0,1,2,3,4,5,6) to eastern arabic(٠, ١, ٢, ٣))

Is there any way available in python that I can convert decimal numbers (99.3) to (٩ ٩ .٣ )

I can convert the simple integers to eastern Arabic but the issue is with decimal.

devanagari_nums = ('۰', '۱', '۲', '۳', '۴', '۵', '۶', '۷', '۸', '۹')
number = str(numeral)
return ''.join(devanagari_nums[int(digit)] for digit in number)

Upvotes: 0

Views: 212

Answers (1)

BoarGules
BoarGules

Reputation: 16941

There are three ways (perhaps more) to approach this. One is to use the numeric value of the input digit (for example "6" translates to 6) as an index into the tuple with the output digits. The difficulty with this, as you have discovered, is that a decimal point has no numeric value. You can work around this with an if-test:

>>> numeral = 12.345
>>> number = str(numeral)
>>> number
'12.345'
>>> digits = [devanagari_nums[int(k)]  if k.isdigit() else k for k in number]
>>> ''.join(digits)
'۱۲۳.۴۵'

Python programmers almost automatically reach for a dictionary when a lookup is required. So the other obvious approach is to use a dictionary instead of a tuple for your lookup table. This amounts to explicitly stating the equivalence '6' => '۶' instead of relying on '۶' occupying the 6th position of the tuple.

>>> devanagari_nums = {'0':'۰', '1':'۱', '2':'۲', '3':'۳', '4':'۴', '5':'۵', '6':'۶', '7':'۷', '8':'۸', '9':'۹', '.': '.'}
>>> numeral = 12.345
>>> number = str(numeral)
>>> digits = [devanagari_nums[k] for k in number ]
>>> ''.join(digits)
'۱۲۳.۴۵'

Your question equates 99.3 with ٩ ٩ .٣ but I suspect this has more to do with the SO editor's handling of RTL scripts than with what you expect, because your code implies that you expect ٩٩.٣. If I've got that wrong, do digits.reverse() before ''.join(digits).

The third way is unobvious and very far from your original approach, so I have left it to last:

>>> tx = str.maketrans('0123456789','۰۱۲۳۴۵۶۷۸۹')
>>> number.translate(tx)   # number as defined in the earlier examples
'۱۲۳.۴۵'

This looks like the first way above: a positional mapping from input character to output character. And in Python 2 that was exactly what it was. But under the hood in Python 3 it is a variant of the second way, as you will quickly discover if you examine tx:

>>> tx
{48: 1776, 49: 1777, 50: 1778, 51: 1779, 52: 1780, 53: 1781, 54: 1782, 55: 1783, 56: 1784, 57: 1785}

I suppose I don't need to explain that ord('1') == 49 and ord('۱') == 1777.

Upvotes: 1

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