Unwanted behaviour of the no_checksum option for EuropeanArticleNumber13

[mzonzon]

If the no_checksum option is passed, A 13 digits code should be accepted as it is.
At the moment, the last digit is replaced by a 0 and it cannot be otherwise:

digits = 12
ean = ean[:self.digits]
# Add a thirteen char if given in parameter,
# otherwise pad with zero
self.ean =  '{0}{1}'.format( ean, ean[self.digits] if len(ean) > self.digits else 0)

len(ean) > self.digits is never going to happen

[AlexP11223]

Bump.
Looks like it is indeed does not work as intended.

>>> barcode.get('ean13')('1234567891234', no_checksum=True)
<EuropeanArticleNumber13('1234567891230')>

instead of 1234567891234.

[WhyNotHugo]

Can you confirm if #98 fixes the issue for you?

If so, I'll add some tests and merge it in. Thanks!

[AlexP11223]

I am too lazy to figure out how to build/install it :D

But yeah, looks correct.

Maybe adding some validation for the number of digits would be good.

Fix crash

hm, I did not have any crashes. 🤔
Just wrong last digit output like above.

[zhusihan-python]

hello, is this bug fixed? i tried python-barcode 0.14.0 on windows 10 py 3.9.0, the last digit/checksum can not be disabled

>>> import barcode
>>> barcode.get('ean13')('1234567891234', no_checksum=True)
<EuropeanArticleNumber13('1234567891230')>
>>>
>>> from barcode import EAN13
>>> 
>>> EAN13("1234567891234").get_fullcode()
'1234567891231'
>>>
>>> EAN13("1234567891235").get_fullcode() 
'1234567891231'
>>>
>>> EAN13("1234567891236").get_fullcode()
'1234567891231'
>>>
>>> EAN13("1234567891237").get_fullcode()
'1234567891231'
>>>
>>> EAN13("1234567891237").calculate_checksum()
2