Incorrectly installed package

[lschwetlick]

When installing zbarlight using pip, I get the following error, that I have been unable to find any information about. I use MacOS, Python3 and pip3.
I followed the install procedure, i.e. zbar was installed via homebrew.
The pip install of zbarlight finishes the install with this warning:

Running setup.py (path:/private/var/folders/gk/07t7dq7n01v45sj7k8295dqc0000gn/T/pip-build-di27kndu/zbarlight/setup.py) egg_info for package zbarlight produced metadata for project name unknown. Fix your #egg=zbarlight fragments.

The package is also not listed as zbarlight but as UNKNOWN in my pip list. It also doesnt show any documentation using "pip show".
When I install directly from source (download zip, then run setup.py) the same error occurs.

I can import the module in python (as zbarlight, not as UNKNOWN), but the command "zbarlight.scan_codes('qrcode', image)" gives the error

AttributeError: module 'zbarlight' has no attribute 'scan_codes'

Is there a known solution to this problem?

This is the verbose output of the pip install:

Collecting zbarlight
  1 location(s) to search for versions of zbarlight:
  * https://pypi.python.org/simple/zbarlight/
  Getting page https://pypi.python.org/simple/zbarlight/
  Looking up "https://pypi.python.org/simple/zbarlight/" in the cache
  Current age based on date: 107
  Freshness lifetime from max-age: 600
  Freshness lifetime from request max-age: 600
  The response is "fresh", returning cached response
  600 > 107
  Analyzing links from page https://pypi.python.org/simple/zbarlight/
    Found link https://pypi.python.org/packages/2d/9b/e987d8b983b463e96169260585a2828ad10fd932523460f2322d07fdeccf/zbarlight-2.0.tar.gz#md5=04adbbfa49c65885584c0063f347d728 (from https://pypi.python.org/simple/zbarlight/), version: 2.0
    Found link https://pypi.python.org/packages/43/e2/429cd76e049285b9a53e40c813826307f19f0be6562dfb948332cdeb9615/zbarlight-1.2.tar.gz#md5=66a573d065ec42c1c80a767b6d05bbbf (from https://pypi.python.org/simple/zbarlight/), version: 1.2
    Found link https://pypi.python.org/packages/58/21/af35efb01959ce9be2a6c14e25260530657456b3e914fbc8bf0c16d79c2d/zbarlight-0.1.1.tar.gz#md5=5bc8147eb6464041d82589e37f02b38e (from https://pypi.python.org/simple/zbarlight/), version: 0.1.1
    Found link https://pypi.python.org/packages/a2/29/7a1cd98a5e2098623a24f8853514607f68ff376b263101b7276bc8179221/zbarlight-1.0.0.tar.gz#md5=580728bbaf0a0838f5667264b90e4254 (from https://pypi.python.org/simple/zbarlight/), version: 1.0.0
    Found link https://pypi.python.org/packages/a3/92/743e2aafa1b025a1f65d74411be617e900a45e3ba6962e43565c8ab08d15/zbarlight-0.1.0.tar.gz#md5=825c79c7e9ed61b7af2ca28f91f74f3c (from https://pypi.python.org/simple/zbarlight/), version: 0.1.0
    Found link https://pypi.python.org/packages/a4/4a/42e4760e882a8c71350002b3356aaff8d1a5e335030610913a2457351d42/zbarlight-1.0.2.tar.gz#md5=1e78e3ec69aaf251491373137d490010 (from https://pypi.python.org/simple/zbarlight/), version: 1.0.2
    Found link https://pypi.python.org/packages/da/cc/2490f49f5ba7be2034ebf33ba48b7ccb1bbb53e706b1c79d2c6504439bee/zbarlight-1.0.1.tar.gz#md5=fa31a575f5e8a3f6de0b9b6f93e0020a (from https://pypi.python.org/simple/zbarlight/), version: 1.0.1
    Found link https://pypi.python.org/packages/f8/cc/941f0e91fd3ab61e59cb84bd4b13063b658de04d58acc7857b66010cf166/zbarlight-1.1.0.tar.gz#md5=1ea8daea1758f342b71a126b13a54baf (from https://pypi.python.org/simple/zbarlight/), version: 1.1.0
  Using version 2.0 (newest of versions: 0.1.0, 0.1.1, 1.0.0, 1.0.1, 1.0.2, 1.1.0, 1.2, 2.0)
  Looking up "https://pypi.python.org/packages/2d/9b/e987d8b983b463e96169260585a2828ad10fd932523460f2322d07fdeccf/zbarlight-2.0.tar.gz" in the cache
  Current age based on date: 7016
  Freshness lifetime from max-age: 31557600
  The response is "fresh", returning cached response
  31557600 > 7016
  Using cached zbarlight-2.0.tar.gz
  Downloading from URL https://pypi.python.org/packages/2d/9b/e987d8b983b463e96169260585a2828ad10fd932523460f2322d07fdeccf/zbarlight-2.0.tar.gz#md5=04adbbfa49c65885584c0063f347d728 (from https://pypi.python.org/simple/zbarlight/)
  Running setup.py (path:/private/var/folders/gk/07t7dq7n01v45sj7k8295dqc0000gn/T/pip-build-di27kndu/zbarlight/setup.py) egg_info for package zbarlight
    Running command python setup.py egg_info
    /Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/distutils/dist.py:261: UserWarning: Unknown distribution option: 'long_description_content_type'
      warnings.warn(msg)
    warning: no files found matching '*' under directory 'setuptools/_vendor'

    Installed /private/var/folders/gk/07t7dq7n01v45sj7k8295dqc0000gn/T/pip-build-di27kndu/zbarlight/.eggs/setuptools-38.4.0-py3.6.egg
    running egg_info
    creating pip-egg-info/UNKNOWN.egg-info
    writing pip-egg-info/UNKNOWN.egg-info/PKG-INFO
    writing dependency_links to pip-egg-info/UNKNOWN.egg-info/dependency_links.txt
    writing top-level names to pip-egg-info/UNKNOWN.egg-info/top_level.txt
    writing manifest file 'pip-egg-info/UNKNOWN.egg-info/SOURCES.txt'
    warning: manifest_maker: standard file '-c' not found

    reading manifest file 'pip-egg-info/UNKNOWN.egg-info/SOURCES.txt'
    reading manifest template 'MANIFEST.in'
    no previously-included directories found matching 'docs'
    no previously-included directories found matching 'tests'
    warning: no previously-included files matching '*.py[cod]' found anywhere in distribution
    warning: no previously-included files matching '__pycache__' found anywhere in distribution
    warning: no previously-included files matching '*.so' found anywhere in distribution
    warning: no previously-included files found matching 'Makefile'
    warning: no previously-included files found matching 'requirements-dev.txt'
    warning: no previously-included files found matching 'tox.ini'
    warning: no previously-included files found matching 'run.py'
    writing manifest file 'pip-egg-info/UNKNOWN.egg-info/SOURCES.txt'
  Running setup.py (path:/private/var/folders/gk/07t7dq7n01v45sj7k8295dqc0000gn/T/pip-build-di27kndu/zbarlight/setup.py) egg_info for package zbarlight produced metadata for project name unknown. Fix your #egg=zbarlight fragments.
  Source in /private/var/folders/gk/07t7dq7n01v45sj7k8295dqc0000gn/T/pip-build-di27kndu/zbarlight has version 0.0.0, which satisfies requirement unknown from https://pypi.python.org/packages/2d/9b/e987d8b983b463e96169260585a2828ad10fd932523460f2322d07fdeccf/zbarlight-2.0.tar.gz#md5=04adbbfa49c65885584c0063f347d728
  Requirement already satisfied (use --upgrade to upgrade): unknown from https://pypi.python.org/packages/2d/9b/e987d8b983b463e96169260585a2828ad10fd932523460f2322d07fdeccf/zbarlight-2.0.tar.gz#md5=04adbbfa49c65885584c0063f347d728 in /Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages
Cleaning up...
  Removing source in /private/var/folders/gk/07t7dq7n01v45sj7k8295dqc0000gn/T/pip-build-di27kndu/zbarlight

[fbochu]

Hi, thanks for the report.

Which version of setuptools and pip do you use ? The package is only compatible with setuptools >= 30.3.

[nasaWelder]

I got similiar error on ubuntu mate:
devarea@devarea-Inspiron-1545:~$ pip install zbarlight
Collecting zbarlight
Using cached zbarlight-2.0.tar.gz
Running setup.py (path:/tmp/pip-build-wT2_BT/zbarlight/setup.py) egg_info for package zbarlight produced metadata for project name unknown. Fix your #egg=zbarlight fragments.
Building wheels for collected packages: unknown, unknown
Running setup.py bdist_wheel for unknown ... done
Stored in directory: /home/devarea/.cache/pip/wheels/d2/a4/82/d10c001eb84dd52671c566faf6c4be598094edf7617c1e6661
Running setup.py bdist_wheel for unknown ... error
Complete output from command /usr/bin/python -u -c "import setuptools, tokenize;file='/tmp/pip-build-wT2_BT/unknown/setup.py';exec(compile(getattr(tokenize, 'open', open)(file).read().replace('\r\n', '\n'), file, 'exec'))" bdist_wheel -d /tmp/tmpIKHjccpip-wheel- --python-tag cp27:
Traceback (most recent call last):
File "", line 1, in
IOError: [Errno 2] No such file or directory: '/tmp/pip-build-wT2_BT/unknown/setup.py'

---

Failed building wheel for unknown
Running setup.py clean for unknown
Complete output from command /usr/bin/python -u -c "import setuptools, tokenize;file='/tmp/pip-build-wT2_BT/unknown/setup.py';exec(compile(getattr(tokenize, 'open', open)(file).read().replace('\r\n', '\n'), file, 'exec'))" clean --all:
Traceback (most recent call last):
File "", line 1, in
IOError: [Errno 2] No such file or directory: '/tmp/pip-build-wT2_BT/unknown/setup.py'

---

Failed cleaning build dir for unknown
Successfully built unknown
Failed to build unknown
Installing collected packages: unknown
Successfully installed unknown-0.0.0
You are using pip version 8.1.1, however version 9.0.1 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.
devarea@devarea-Inspiron-1545:$ pip install --upgrade pip
Collecting pip
Downloading pip-9.0.1-py2.py3-none-any.whl (1.3MB)
100% |████████████████████████████████| 1.3MB 626kB/s
Installing collected packages: pip
Successfully installed pip-9.0.1
devarea@devarea-Inspiron-1545:$ pip install zbarlight
Collecting zbarlight
Installing collected packages: zbarlight
Exception:
Traceback (most recent call last):
File "/home/devarea/.local/lib/python2.7/site-packages/pip/basecommand.py", line 215, in main
status = self.run(options, args)
File "/home/devarea/.local/lib/python2.7/site-packages/pip/commands/install.py", line 342, in run
prefix=options.prefix_path,
File "/home/devarea/.local/lib/python2.7/site-packages/pip/req/req_set.py", line 784, in install
**kwargs
File "/home/devarea/.local/lib/python2.7/site-packages/pip/req/req_install.py", line 851, in install
self.move_wheel_files(self.source_dir, root=root, prefix=prefix)
File "/home/devarea/.local/lib/python2.7/site-packages/pip/req/req_install.py", line 1064, in move_wheel_files
isolated=self.isolated,
File "/home/devarea/.local/lib/python2.7/site-packages/pip/wheel.py", line 345, in move_wheel_files
clobber(source, lib_dir, True)
File "/home/devarea/.local/lib/python2.7/site-packages/pip/wheel.py", line 316, in clobber
ensure_dir(destdir)
File "/home/devarea/.local/lib/python2.7/site-packages/pip/utils/init.py", line 83, in ensure_dir
os.makedirs(path)
File "/usr/lib/python2.7/os.py", line 157, in makedirs
mkdir(name, mode)
OSError: [Errno 13] Permission denied: '/usr/local/lib/pyth

[nasaWelder]

Fix for me:
sudo -H pip3 install setuptools --upgrade
sudo -H pipe install zbarlight

[fbochu]

Unless it's a blocking issue for one of you (or any other zbarlight user), I do not reconsider moving to setup.cfg (that's why zbarlight needs setuptools> = 30.3).

[bilelmoussaoui]

I'm having the same issue here. I'm using zbarlight to scan qrcodes on a Gtk Application. I have built zbar with those options

         "--without-qt",
         "--without-gtk",
         "--without-imagemagick",
         "--disable-video"

And built zbarlight with setuptools 38.2.5.
Is there anything I can do to debug this?
In /include I have zbar and zbar.h...
Somehow, I don't have the init.py file in site-packages/zbarlight/

[fbochu]

Sorry for the time of response, I think that Python only search includes in /usr/include by default. You can use envvars to set your compiler search path. Without the stack trace I can not help you more.

[rotemreiss]

Fix for me:
sudo -H pip3 install setuptools --upgrade
sudo -H pipe install zbarlight

There's a typo on the 2nd command. This should be:
sudo -H pip3 install zbarlight