DBR Python Extension

Version 7.2.1

The repository aims to help developers build Python barcode apps with Dynamsoft Barcode Reader in Windows, Linux, macOS, and Raspberry Pi.

License

Get the trial license here. Then replace the old license with the newly generated one in the config.py file.

Contact Us

[email protected]

Environment

Python 2/3

Supported Symbologies

• Linear Barcodes (1D)

  • Code 39 (including Code 39 Extended)
  • Code 93
  • Code 128
  • Codabar
  • Interleaved 2 of 5
  • EAN-8
  • EAN-13
  • UPC-A
  • UPC-E
  • Industrial 2 of 5

• 2D Barcodes:

  • QR Code (including Micro QR Code)
  • Data Matrix
  • PDF417 (including Micro PDF417)
  • Aztec Code
  • MaxiCode (mode 2-5)

• Patch Code

• GS1 DataBar (Omnidirectional, Truncated, Stacked, Stacked Omnidirectional, Limited, Expanded, Expanded Stacked)

• GS1 Composite Code

Installation

• Dynamsoft Barcode Reader SDK.

• OpenCV

  py -2 -m pip install opencv-python
  py -3 -m pip install opencv-python
  

  For Raspberry Pi

  sudo apt-get install libopencv-dev python-opencv
  

• NumPy

  py -2 -m pip install numpy
  py -3 -m pip install numpy
  

HowTo

Windows

Set Visual Studio in cmd.exe. For example, Visual Studio 2015:

SET VS90COMNTOOLS=%VS140COMNTOOLS%

Edit setup.py. Replace the dbr_lib_dir and dbr_dll with yours:

dbr_lib_dir = r'e:\Program Files (x86)\Dynamsoft\Barcode Reader 7.2.1\Components\C_C++\Lib'
dbr_dll = r'e:\Program Files (x86)\Dynamsoft\Barcode Reader 7.2.1\Components\C_C++\Redist\x64'

Build and install the Python extension:

cd src
py -2 setup.py build install
py -3 setup.py build install

Linux, macOS and Raspberry Pi

Copy libDynamsoftBarcodeReader.so/libDynamsoftBarcodeReader.dylib to /usr/lib. If you don't have access to /usr/lib, try to copy the library to /usr/local/lib and set the LD_LIBRARY_PATH as follows:

export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/lib

Build and install the Python extension:

cd src
sudo py -2 setup.py build install
sudo py -3 setup.py build install

Examples

• examples/video

  python rtsp.py
  

• examples/camera

  python camera-decodevideo.py
  

• examples/command-line

  python test.py
  

Functions

• initLicense(license-key)

• decodeFile(filename, barcodeTypes)

  barcodeTypes = dbr.BF_ONED | dbr.BF_PDF417 | dbr.BF_QR_CODE | dbr.BF_DATAMATRIX | dbr.BF_AZTEC 
  

  Barcode Format	Values
  ALL	dbr.BF_ALL
  1D	dbr.BF_ONED
  PDF417	dbr.BF_PDF417
  QR Code	dbr.BF_QR_CODE
  DataMatrix	dbr.BF_DATAMATRIX
  Aztec Code	dbr.BF_AZTEC

• decodeBuffer(frame-by-opencv-capture, barcodeTypes)

• decodeFileStream(fileStream, fileSzie, barcodeTypes)

• startVideoMode(max_buffer, max_results, video_width, video_height, image_format, barcodeTypes, callback)

• stopVideoMode()

• appendVideoFrame(frame-by-opencv-capture)

• initLicenseFromLicenseContent(license-key, license-content)

• outputLicenseToString()

• initLicenseFromServer(license-key, license-server)

• setFurtherModes(mode, [values])

• setParameters(json-string)

Online Documentation

https://www.dynamsoft.com/Products/Barcode-Reader-Resources.aspx#documentation

Related Articles

• How to Define Python Object Members in C Code
• Python Barcode Decoding on Non-Python Created Thread
• Things to Do with DBR 6.0 and Python Barcode Extension
• How to Port C/C++ Barcode Extension to Python 3
• Building Python Barcode Extension with DBR 5.0 on Windows
• Building Python Barcode Extension with DBR 5.2 for Linux