diff options
Diffstat (limited to 'stdnum/isbn.py')
| -rw-r--r-- | stdnum/isbn.py | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/stdnum/isbn.py b/stdnum/isbn.py index 6bd5b79..0eee01e 100644 --- a/stdnum/isbn.py +++ b/stdnum/isbn.py @@ -17,9 +17,11 @@ # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA # 02110-1301 USA -"""Module for handling ISBNs (International Standard Book Number). This -module handles both numbers in ISBN-10 (10-digit) and ISBN-13 (13-digit) -format. +"""ISBN (International Standard Book Number). + +The ISBN is the International Standard Book Number, used to identify +publications. This module supports both numbers in ISBN-10 (10-digit) and +ISBN-13 (13-digit) format. >>> is_valid('978-9024538270') True @@ -85,8 +87,6 @@ def isbn_type(number): if ean.calc_check_digit(number[:-1]) != number[-1]: return None return 'ISBN13' - else: - return None def is_valid(number): @@ -115,7 +115,7 @@ def to_isbn13(number): def to_isbn10(number): - """Convert the number to ISBN-13 format.""" + """Convert the number to ISBN-10 format.""" number = number.strip() min_number = compact(number) if len(min_number) == 10: |