faker.providers.barcode.en_CA
¶
Package Contents¶
Classes¶
Implement barcode provider for |
|
Implement barcode provider for |
- class faker.providers.barcode.en_CA.EnUsBarcodeProvider(generator: Any)¶
Bases:
faker.providers.barcode.Provider
Implement barcode provider for
en_US
locale.Sources:
- local_prefixes = ()¶
- upc_e_base_pattern: Pattern¶
- upc_ae_pattern1: Pattern¶
- upc_ae_pattern2: Pattern¶
- upc_ae_pattern3: Pattern¶
- ean13(prefixes: faker.providers.barcode.PrefixType = (), leading_zero: Optional[bool] = None) str ¶
Generate an EAN-13 barcode.
If
leading_zero
isTrue
, the leftmost digit of the barcode will be set to0
. IfFalse
, the leftmost digit cannot be0
. IfNone
(default), the leftmost digit can be any digit.If a value for
prefixes
is specified, the result will begin with one of the sequences inprefixes
and will ignoreleading_zero
.This method uses the standard barcode provider’s |ean13| under the hood with the
prefixes
argument set to the correct value to attain the behavior described above.Note
EAN-13 barcode that starts with a zero can be converted to UPC-A by dropping the leading zero. This may cause problems with readers that treat all of these code as UPC-A codes and drop the first digit when reading it.
You can set the argument
prefixes
( orleading_zero
for convenience) explicitly to avoid or to force the generated barcode to start with a zero. You can also generate actual UPC-A barcode with |EnUsBarcodeProvider.upc_a|.- Sample
- Sample
leading_zero=False
- Sample
leading_zero=True
- Sample
prefixes=(‘00’,)
- Sample
prefixes=(‘45’, ‘49’)
- _convert_upc_a2e(upc_a: str) str ¶
Convert a 12-digit UPC-A barcode to its 8-digit UPC-E equivalent.
Warning
Not all UPC-A barcodes can be converted.
- _upc_ae(base: Optional[str] = None, number_system_digit: Optional[int] = None) str ¶
Create a 12-digit UPC-A barcode that can be converted to UPC-E.
The expected value of
base
is a 6-digit string. If any other value is provided, this method will use a random 6-digit string instead.The expected value of
number_system_digit
is the integer0
or1
. If any other value is provided, this method will randomly choose from the two.Please also view notes on |EnUsBarcodeProvider.upc_a| and |EnUsBarcodeProvider.upc_e| for more details.
- upc_a(upc_ae_mode: bool = False, base: Optional[str] = None, number_system_digit: Optional[int] = None) str ¶
Generate a 12-digit UPC-A barcode.
The value of
upc_ae_mode
controls how barcodes will be generated. IfFalse
(default), barcodes are not guaranteed to have a UPC-E equivalent. In this mode, the method uses |EnUsBarcodeProvider.ean13| under the hood, and the values ofbase
andnumber_system_digit
will be ignored.If
upc_ae_mode
isTrue
, the resulting barcodes are guaranteed to have a UPC-E equivalent, and the values ofbase
andnumber_system_digit
will be used to control what is generated.Under this mode,
base
is expected to have a 6-digit string value. If any other value is supplied, a random 6-digit string will be used instead. As fornumber_system_digit
, the expected value is a0
or a1
. If any other value is provided, this method will randomly choose from the two.Important
When
upc_ae_mode
is enabled, you might encounter instances where different values ofbase
(e.g.'120003'
and'120004'
) produce the same UPC-A barcode. This is normal, and the reason lies within the whole conversion process. To learn more about this and whatbase
andnumber_system_digit
actually represent, please refer to |EnUsBarcodeProvider.upc_e|.- Sample
- Sample
upc_ae_mode=True, number_system_digit=0
- Sample
upc_ae_mode=True, number_system_digit=1
- Sample
upc_ae_mode=True, base=’123456’, number_system_digit=0
- Sample
upc_ae_mode=True, base=’120003’, number_system_digit=0
- Sample
upc_ae_mode=True, base=’120004’, number_system_digit=0
- upc_e(base: Optional[str] = None, number_system_digit: Optional[int] = None, safe_mode: bool = True) str ¶
Generate an 8-digit UPC-E barcode.
UPC-E barcodes can be expressed in 6, 7, or 8-digit formats, but this method uses the 8 digit format, since it is trivial to convert to the other two formats. The first digit (starting from the left) is controlled by
number_system_digit
, and it can only be a0
or a1
. The last digit is the check digit that is inherited from the UPC-E barcode’s UPC-A equivalent. The middle six digits are collectively referred to as thebase
(for a lack of a better term).On that note, this method uses
base
andnumber_system_digit
to first generate a UPC-A barcode for the check digit, and what happens next depends on the value ofsafe_mode
. The argumentsafe_mode
exists, because there are some UPC-E values that share the same UPC-A equivalent. For example, any UPC-E barcode of the formabc0000d
,abc0003d
, andabc0004d
share the same UPC-A valueabc00000000d
, but that UPC-A value will only convert toabc0000d
because of (a) how UPC-E is just a zero-suppressed version of UPC-A and (b) the rules around the conversion.If
safe_mode
isTrue
(default), this method performs another set of conversions to guarantee that the UPC-E barcodes generated can be converted to UPC-A, and that UPC-A barcode can be converted back to the original UPC-E barcode. Using the example above, even if the bases120003
or120004
are used, the resulting UPC-E barcode will always use the base120000
.If
safe_mode
isFalse
, then thenumber_system_digit
,base
, and the computed check digit will just be concatenated together to produce the UPC-E barcode, and attempting to convert the barcode to UPC-A and back again to UPC-E will exhibit the behavior described above.- Sample
- Sample
base=’123456’
- Sample
base=’123456’, number_system_digit=0
- Sample
base=’123456’, number_system_digit=1
- Sample
base=’120000’, number_system_digit=0
- Sample
base=’120003’, number_system_digit=0
- Sample
base=’120004’, number_system_digit=0
- Sample
base=’120000’, number_system_digit=0, safe_mode=False
- Sample
base=’120003’, number_system_digit=0, safe_mode=False
- Sample
base=’120004’, number_system_digit=0, safe_mode=False
- class faker.providers.barcode.en_CA.Provider(generator: Any)¶
Bases:
faker.providers.barcode.en_US.Provider
Implement barcode provider for
en_CA
locale.Canada uses UPC as well, so there are similarities between this and the
en_US
implementation.Sources:
- local_prefixes = ()¶