Code 128 Barcode

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Create code128 barcodes

Project description

Overview

code128 is a simple library to create Code-128 barcodes.

useful links:

Repository with latest source

CODE 128 is the standard just for the barcode itself. The difference between GS1-128 and CODE 128 is whether it represents the application or not. Since GS1-128 uses the barcode composition of CODE 128, any barcode reader that can read CODE 128 can be used to read the GS1-128 data. Application Identifier Application Identifier. GS1-128 Barcodes (formerly UCC / EAN-128) GS1-128 was developed to provide a global standard for exchanging data between different companies. GS1-128 not only encodes the data, but provides a method of defining the meaning of the data by defining a list of 'Application Identifiers' (AI's).In 2006, the Uniform Code Council changed their name to GS1 US, and have moved towards creating. Code 128 code sets A, B, C and start characters Three different code sets are defined for Code 128 (dubbed A, B, and C) that determine how the code is interpreted by the barcode scanner. The code sets differ in compactness and encodable character set. Code 128 A: Partial ASCII set, no lower case, but ASCII control chars (TAB, CR/LF etc.).

License

Copyright (c) 2014-2015 Felix Knopf

This library is free software; you can redistribute it and/ormodify it under the terms of the GNU Lesser General PublicLicense as published by the Free Software Foundation; eitherversion 2.1 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,but WITHOUT ANY WARRANTY; without even the implied warranty ofMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNULesser General Public License in the LICENSE.txt for more details.

What's New

0.2

Command Line Interface; PyPI integration

Features

• optimal codes (use code128C to encode long sequences of digits; lazy switch between Code128A and B)
• full latin-1 charset is supported
• no additional libraries needed for svg output
• output as PIL Image objects (PIL requiered)
• command line tool and gui

Setup

This is a pure python package, for this the following steps are optional.A copy of the package (folder code128 in the source archive) in your directory will also work for this specific project.The instructions below ensure that the library is available for every python module and from the command line.

Note, that some Linux Systems use python3 and pip3 to distinguish from their Python2 versions.

For Windwos users without a Python installation there is also a ‘stand-alone' version available.

Dependencies

• Python3 (Tested with 3.3 and 3.4, other versions should work, too)
• setuptools to use the setup script or pip, usually preinstalled
• optional: PIL, or compatible fork (Pillow is recommended) to save barcodes as raster graphics

Windows Users

A convenient graphical installer is provided for the final releases.

build from source

download the zip archive or tarball, extract it and install with (you may need root access):

Usage

from shell

Code128 provides a command line interface. If you installed the library, simply type

The packet also defines a __main__.py entry point, so

will work, too.

The GUI

will start the graphical mode, where you can preview your codes.This needs PIL and tkinter.

Contribution

Use the Issue Tracker on Bitbucket to report bugs, request a feature, etc.

If you want to contribute some code, feel free to create a pull request.

Release historyRelease notifications | RSS feed

0.3

0.2

0.2b2 pre-release

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GS1-128 is an application standard of the GS1implementation using the Code 128barcodespecification. The former correct name was UCC/EAN-128. Other no longer used names have included UCC-128 and EAN-128. The GS1-128 standard was introduced in 1989 ^[1] and uses a series of Application Identifiers to include additional data such as best before dates, batch numbers, quantities, weights and many other attributes needed by the user.

Overview[edit]

The GS1-128 standard is an application standard within the Code 128 barcode. It identifies data with Application Identifiers (AI). Without spaces below, a simple SSCC (Serial Shipping Container Code) barcode would look something like this:

In the example above, [FNC1] is the single character Function Code 1, which specifies that a Code 128 barcode is a GS1-128 code. 00 is the serial shipping container code ('SSCC') AI that designates the following data as a serial shipping container code. 12345678 is the company number. 0000000001 is the container number.

It is possible to encode several pieces of data in one barcode. For example, a product serial number (application identifier code 21), production date (code 11), and expiration date (code 17) together would look something like this:

An additional FNC1 is required before the production date, because the preceding product serial number is variable length. This is not required before the expiration date, because the production date is fixed length. Reordering the components to place a variable-length field last produces a more compact form:

Mapping to EPC codes[edit]

As EPC and EAN respectively UCC as code systems are not congruent, GS1-128 gets mapped to EPC-GTIN with a reference list including both codes per type of product. However, there is no mapping for the serial number with EPC-SGTIN.

Full list of Application Identifiers[edit]

Code 128 Barcodes In Excel

This list is from 2003 and therefore out of date and possibly incorrect. Also this is copyrighted by GS1 – for the up to date list please see the link below for the GS1 General Specifications^[2] Because code 128 is more efficient at coding pairs of digits, preference is given to even lengths in numeric fields.

All dates are formatted as YYMMDD.

y in the AI gives a number of decimal places in the following value. The represented value is the following integer divided by 10^y. For example, a net weight of 22.7 kg could be coded as 3101 000227, 3102 002270, 3103 022700, or 3104 227000.

Cached

References[edit]

Code 128 Barcode Font

1. ^'GS1 Historic Timeline'. GS1. Retrieved 9 October 2018.
2. ^General specifications(PDF), GS1.

Code 128 Barcode Font For Excel

External links[edit]