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py3: Port check_isbn()

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Kovid Goyal 2019-04-15 20:06:02 +05:30
parent 204ab15119
commit c8355e17b2
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1 changed files with 6 additions and 6 deletions
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12
src/calibre/ebooks/metadata/__init__.py
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@ -11,7 +11,7 @@ import os, sys, re
from calibre import relpath, guess_type, remove_bracketed_text, prints, force_unicode
from calibre.utils.config_base import tweaks
from polyglot.builtins import codepoint_to_chr, unicode_type, range
from polyglot.builtins import codepoint_to_chr, unicode_type, range, map
from polyglot.urllib import quote, unquote, urlparse
@ -337,26 +337,26 @@ def MetaInformation(title, authors=(_('Unknown'),)):
def check_isbn10(isbn):
try:
digits = map(int, isbn[:9])
digits = tuple(map(int, isbn[:9]))
products = [(i+1)*digits[i] for i in range(9)]
check = sum(products)%11
if (check == 10 and isbn[9] == 'X') or check == int(isbn[9]):
return isbn
except:
except Exception:
pass
return None
def check_isbn13(isbn):
try:
digits = map(int, isbn[:12])
digits = tuple(map(int, isbn[:12]))
products = [(1 if i%2 ==0 else 3)*digits[i] for i in range(12)]
check = 10 - (sum(products)%10)
if check == 10:
check = 0
if str(check) == isbn[12]:
return isbn
except:
except Exception:
pass
return None
@ -380,7 +380,7 @@ def check_issn(issn):
return None
issn = re.sub(r'[^0-9X]', '', issn.upper())
try:
digits = map(int, issn[:7])
digits = tuple(map(int, issn[:7]))
products = [(8 - i) * d for i, d in enumerate(digits)]
check = 11 - sum(products) % 11
if (check == 10 and issn[7] == 'X') or check == int(issn[7]):