Fixing the fixing of the PEP8 for lambda functions. http://legacy.python.org/dev/peps/pep-0008/#programming-recommendations

Author: Mibou

barcode/ean.py

@@ -62,7 +62,7 @@ def calculate_checksum(self):
         :returns: The checksum for `self.ean`.
         :rtype: Integer
         """
-        def sum_(x, y): return lambda x, y: int(x) + int(y)
+        def sum_(x, y): return int(x) + int(y)
         evensum = reduce(sum_, self.ean[::2])
         oddsum = reduce(sum_, self.ean[1::2])
         return (10 - ((evensum + oddsum * 3) % 10)) % 10
@@ -143,7 +143,7 @@ def calculate_checksum(self):
         :returns: The checksum for `self.ean`.
         :rtype: Integer
         """
-        def sum_(x, y): return lambda x, y: int(x) + int(y)
+        def sum_(x, y): return int(x) + int(y)
         evensum = reduce(sum_, self.ean[::2])
         oddsum = reduce(sum_, self.ean[1::2])
         return (10 - ((evensum * 3 + oddsum) % 10)) % 10