Q: How to fix the missing dependancies in pyzbar - python-3.x

Question

I am currently using spyder via anaconda with python 3.8.5 on windows 10 and I am trying to use the pyzbar package to make a barcode reader. When I try to run the script I get this error message when trying to run from pyzbar.pyzbar import decode and from pyzbar import pyzbar:
Traceback (most recent call last):
File "C:\Users\norinhan\Anaconda3\lib\site-packages\pyzbar\zbar_library.py", line 58, in load
dependencies, libzbar = load_objects(Path(''))
File "C:\Users\norinhan\Anaconda3\lib\site-packages\pyzbar\zbar_library.py", line 50, in load_objects
deps = [
File "C:\Users\norinhan\Anaconda3\lib\site-packages\pyzbar\zbar_library.py", line 51, in <listcomp>
cdll.LoadLibrary(str(directory.joinpath(dep)))
File "C:\Users\norinhan\Anaconda3\lib\ctypes\__init__.py", line 459, in LoadLibrary
return self._dlltype(name)
File "C:\Users\norinhan\Anaconda3\lib\ctypes\__init__.py", line 381, in __init__
self._handle = _dlopen(self._name, mode)
FileNotFoundError: Could not find module 'libiconv.dll' (or one of its dependencies). Try using the full path with constructor syntax.
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "<ipython-input-1-95ae0761f4b5>", line 1, in <module>
from pyzbar.pyzbar import decode
File "C:\Users\norinhan\Anaconda3\lib\site-packages\pyzbar\pyzbar.py", line 7, in <module>
from .wrapper import (
File "C:\Users\norinhan\Anaconda3\lib\site-packages\pyzbar\wrapper.py", line 139, in <module>
zbar_version = zbar_function(
File "C:\Users\norinhan\Anaconda3\lib\site-packages\pyzbar\wrapper.py", line 136, in zbar_function
return prototype((fname, load_libzbar()))
File "C:\Users\norinhan\Anaconda3\lib\site-packages\pyzbar\wrapper.py", line 115, in load_libzbar
libzbar, dependencies = zbar_library.load()
File "C:\Users\norinhan\Anaconda3\lib\site-packages\pyzbar\zbar_library.py", line 60, in load
dependencies, libzbar = load_objects(Path(__file__).parent)
File "C:\Users\norinhan\Anaconda3\lib\site-packages\pyzbar\zbar_library.py", line 50, in load_objects
deps = [
File "C:\Users\norinhan\Anaconda3\lib\site-packages\pyzbar\zbar_library.py", line 51, in <listcomp>
cdll.LoadLibrary(str(directory.joinpath(dep)))
File "C:\Users\norinhan\Anaconda3\lib\ctypes\__init__.py", line 459, in LoadLibrary
return self._dlltype(name)
File "C:\Users\norinhan\Anaconda3\lib\ctypes\__init__.py", line 381, in __init__
self._handle = _dlopen(self._name, mode)
FileNotFoundError: Could not find module 'C:\Users\norinhan\Anaconda3\lib\site-packages\pyzbar\libiconv.dll' (or one of its dependencies). Try using the full path with constructor syntax.
When trying to run just import pyzbar it will compile, but it will not be able to access any of the function. When I try I get this message:
Traceback (most recent call last):
File "<ipython-input-3-26272af93b8a>", line 1, in <module>
pyzbar.pyzbar.decode()
AttributeError: module 'pyzbar' has no attribute 'pyzbar'
I have looked up the documentation for pyzbar on github which states "The zbar DLLs are included with the Windows Python wheels", but have not found this anywhere. The closest to "Windows Python wheels" I have found is the wheel package which does not contain any information about pyzbar.
Any advice on how to fix this?

Answer 1

Visit https://pypi.org/project/pyzbar/#files to download pyzbar-0.1.8-py2.py3-none-win_amd64.whl.
You can find all the DLL files inside the wheel package.

Answer 2

I have just encountered this problem.
If your OS & python are x64 version, it's just because of lack of vc 2013 x64 runtime.
You can find Visual C++ Redistributable Packages for Visual Studio 2013 here
download & install.

Answer 3

I was facing similar issue just installed Visual
C++ 64 bit version on my computer and restarted. Choose between vcredist_x86.exe or vcredist_x64.exe based on your machine.
https://www.microsoft.com/en-us/download/confirmation.aspx?id=40784. Hope this solves your issue as well.