def __init__(self, ean, writer=None, no_checksum=False, guardbar=False):
ean = ean[:self.digits]
if not ean.isdigit():
raise IllegalCharacterError("EAN code can only contain numbers.")
if len(ean) != self.digits:
raise NumberOfDigitsError(
"EAN must have {} digits, not {}.".format(
self.digits,
len(ean),
))
self.ean = ean
# If no checksum
if no_checksum:
# Add a thirteen char if given in parameter,
# otherwise pad with zero
self.ean = "{}{}".format(
ean, ean[self.digits] if len(ean) > self.digits else 0)
else:
self.ean = "{}{}".format(ean, self.calculate_checksum())
self.guardbar = guardbar
if guardbar:
self.EDGE = _ean.EDGE.replace("1", "G")
self.MIDDLE = _ean.MIDDLE.replace("1", "G")
else:
self.EDGE = _ean.EDGE
self.MIDDLE = _ean.MIDDLE
self.writer = writer or self.default_writer()
def check_code(code, name, allowed):
wrong = []
for char in code:
if char not in allowed:
wrong.append(char)
if wrong:
raise IllegalCharacterError(
"The following characters are not valid for {name}: {wrong}".
format(name=name, wrong=", ".join(wrong)))
def __init__(self, code, writer=None, narrow=2, wide=5):
if not code.isdigit():
raise IllegalCharacterError('ITF code can only contain numbers.')
# Length must be even, prepend 0 if necessary
if len(code) % 2 != 0:
code = '0' + code
self.code = code
self.writer = writer or Barcode.default_writer()
self.narrow = narrow
self.wide = wide
def __init__(self, upc, writer=None, make_ean=False):
self.ean = make_ean
upc = upc[:self.digits]
if not upc.isdigit():
raise IllegalCharacterError('UPC code can only contain numbers.')
if len(upc) != self.digits:
raise NumberOfDigitsError('UPC must have {0} digits, not '
'{1}.'.format(self.digits, len(upc)))
self.upc = upc
self.upc = '{}{}'.format(upc, self.calculate_checksum())
self.writer = writer or Barcode.default_writer()
def __init__(self, pzn, writer=None):
pzn = pzn[: self.digits]
if not pzn.isdigit():
raise IllegalCharacterError("PZN can only contain numbers.")
if len(pzn) != self.digits:
raise NumberOfDigitsError(
"PZN must have {} digits, not {}.".format(self.digits, len(pzn))
)
self.pzn = pzn
self.pzn = "{}{}".format(pzn, self.calculate_checksum())
Code39.__init__(self, "PZN-{}".format(self.pzn), writer, add_checksum=False)
def __init__(self, pzn, writer=None):
pzn = pzn[: self.digits]
if not pzn.isdigit():
raise IllegalCharacterError("PZN can only contain numbers.")
if len(pzn) != self.digits:
raise NumberOfDigitsError(
f"PZN must have {self.digits} digits, not {len(pzn)}."
)
self.pzn = pzn
self.pzn = f"{pzn}{self.calculate_checksum()}"
super().__init__(f"PZN-{self.pzn}", writer, add_checksum=False)
def __init__(self, upc, writer=None, make_ean=False):
"""Initializes new UPC-A barcode.
:param str upc: The upc number as string.
:param writer: barcode.writer instance. The writer to render the
barcode (default: SVGWriter).
:param bool make_ean: Indicates if a leading zero should be added to
the barcode. This converts the UPC into a valid European Article
Number (EAN).
"""
self.ean = make_ean
upc = upc[:self.digits]
if not upc.isdigit():
raise IllegalCharacterError("UPC code can only contain numbers.")
if len(upc) != self.digits:
raise NumberOfDigitsError(
"UPC must have {} digits, not {}.".format(
self.digits, len(upc)))
self.upc = upc
self.upc = "{}{}".format(upc, self.calculate_checksum())
self.writer = writer or self.default_writer()
def __init__(self, ean, writer=None, no_checksum=False):
ean = ean[:self.digits]
if not ean.isdigit():
raise IllegalCharacterError('EAN code can only contain numbers.')
if len(ean) != self.digits:
raise NumberOfDigitsError(
'EAN must have {0} digits, not {1}.'.format(
self.digits, len(ean),
)
)
self.ean = ean
# If no checksum
if no_checksum:
# 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
)
else:
self.ean = '{0}{1}'.format(ean, self.calculate_checksum())
self.writer = writer or Barcode.default_writer()