IndexError: invalid index to scalar variable. (CaptureReferenceImage.py)

[renish97]

[ WARN:0] global D:\a\opencv-python\opencv-python\opencv\modules\dnn\src\dnn.cpp (1447) cv::dnn::dnn4_v20211004::Net::Impl::setUpNet DNN module was not built with CUDA backend; switching to CPU
Traceback (most recent call last):
File "CaptureReferenceImage.py", line 49, in
ObjectDetector(frame)
File "CaptureReferenceImage.py", line 36, in ObjectDetector
label = "%s : %f" % (class_names[classid[0]], score)
IndexError: invalid index to scalar variable.
[ WARN:0] global D:\a\opencv-python\opencv-python\opencv\modules\videoio\src\cap_msmf.cpp (438) `anonymous-namespace'::SourceReaderCB::~SourceReaderCB terminating async callback

[Asadullah-Dal17]

You need to install the 4.5.3.56 version of opencv python.

Try this.

pip install opencv-contrib-python==4.5.3.56

[lascreia]

You need to install the 4.5.3.56 version of opencv python.

Try this.

pip install opencv-contrib-python==4.5.3.56

After installing it, it worked well, thank you very much.

[FareedUllah09]

When I run this code, I get a new error

#Collecting opencv-contrib-python==4.5.3.56
Using cached opencv-contrib-python-4.5.3.56.tar.gz (150.2 MB)
Installing build dependencies ... error
error: subprocess-exited-with-error

× pip subprocess to install build dependencies did not run successfully.
│ exit code: 1
╰─> [245 lines of output]
Ignoring numpy: markers 'python_version == "3.6" and platform_machine != "aarch64" and platform_machine != "arm64"' don't match your environment
Ignoring numpy: markers 'python_version >= "3.6" and sys_platform == "linux" and platform_machine == "aarch64"' don't match your environment
Ignoring numpy: markers 'python_version >= "3.6" and sys_platform == "darwin" and platform_machine == "arm64"' don't match your environment
Ignoring numpy: markers 'python_version == "3.7" and platform_machine != "aarch64" and platform_machine != "arm64"' don't match your environment
Ignoring numpy: markers 'python_version == "3.8" and platform_machine != "aarch64" and platform_machine != "arm64"' don't match your environment
Collecting setuptools
Using cached setuptools-62.2.0-py3-none-any.whl (1.1 MB)
Collecting wheel
Using cached wheel-0.37.1-py2.py3-none-any.whl (35 kB)
Collecting scikit-build
Using cached scikit_build-0.14.1-py2.py3-none-any.whl (76 kB)
Collecting cmake
Using cached cmake-3.22.4-py2.py3-none-win_amd64.whl (38.1 MB)
Collecting pip
Downloading pip-22.1-py3-none-any.whl (2.1 MB)
---------------------------------------- 2.1/2.1 MB 160.8 kB/s eta 0:00:00
Collecting numpy==1.19.3
Using cached numpy-1.19.3.zip (7.3 MB)
Installing build dependencies: started
Installing build dependencies: finished with status 'done'
Getting requirements to build wheel: started
Getting requirements to build wheel: finished with status 'done'
Preparing metadata (pyproject.toml): started
Preparing metadata (pyproject.toml): finished with status 'error'
error: subprocess-exited-with-error

    Preparing metadata (pyproject.toml) did not run successfully.
    exit code: 1
 
    [202 lines of output]
    setup.py:67: RuntimeWarning: NumPy 1.19.3 may not yet support Python 3.10.
      warnings.warn(
    Running from numpy source directory.
    setup.py:480: UserWarning: Unrecognized setuptools command, 

proceeding with generating Cython sources and expanding templates
run_build = parse_setuppy_commands()
Processing numpy/random_bounded_integers.pxd.in
Processing numpy/random\bit_generator.pyx
Processing numpy/random\mtrand.pyx
Processing numpy/random_bounded_integers.pyx.in
Processing numpy/random_common.pyx
Processing numpy/random_generator.pyx
Processing numpy/random_mt19937.pyx
Processing numpy/random_pcg64.pyx
Processing numpy/random_philox.pyx
Processing numpy/random_sfc64.pyx
Cythonizing sources
blas_opt_info:
blas_mkl_info:
No module named 'numpy.distutils._msvccompiler' in numpy.distutils; trying from distutils
customize MSVCCompiler
libraries mkl_rt not found in ['C:\Users\dell\AppData\Local\Programs\Python\Python310\lib', 'C:\', 'C:\Users\dell\AppData\Local\Programs\Python\Python310\libs']
NOT AVAILABLE

    blis_info:
      libraries blis not found in ['C:\\Users\\dell\\AppData\\Local\\Programs\\Python\\Python310\\lib', 'C:\\', 'C:\\Users\\dell\\AppData\\Local\\Programs\\Python\\Python310\\libs']
      NOT AVAILABLE
 
    openblas_info:
      libraries openblas not found in ['C:\\Users\\dell\\AppData\\Local\\Programs\\Python\\Python310\\lib', 'C:\\', 'C:\\Users\\dell\\AppData\\Local\\Programs\\Python\\Python310\\libs']
    get_default_fcompiler: matching types: '['gnu', 'intelv', 'absoft', 'compaqv', 'intelev', 'gnu95', 'g95', 'intelvem', 'intelem', 'flang']'
    customize GnuFCompiler
    Could not locate executable g77
    Could not locate executable f77
    customize IntelVisualFCompiler
    Could not locate executable ifort
    Could not locate executable ifl
    customize AbsoftFCompiler
    Could not locate executable f90
    customize CompaqVisualFCompiler
    Could not locate executable DF
    customize IntelItaniumVisualFCompiler
    Could not locate executable efl
    customize Gnu95FCompiler
    Could not locate executable gfortran
    Could not locate executable f95
    customize G95FCompiler
    Could not locate executable g95
    customize IntelEM64VisualFCompiler
    customize IntelEM64TFCompiler
    Could not locate executable efort
    Could not locate executable efc
    customize PGroupFlangCompiler
    Could not locate executable flang
    don't know how to compile Fortran code on platform 'nt'     
      NOT AVAILABLE
 
    atlas_3_10_blas_threads_info:
    Setting PTATLAS=ATLAS
      libraries tatlas not found in ['C:\\Users\\dell\\AppData\\Local\\Programs\\Python\\Python310\\lib', 'C:\\', 'C:\\Users\\dell\\AppData\\Local\\Programs\\Python\\Python310\\libs']
      NOT AVAILABLE
 
    atlas_3_10_blas_info:
      libraries satlas not found in ['C:\\Users\\dell\\AppData\\Local\\Programs\\Python\\Python310\\lib', 'C:\\', 'C:\\Users\\dell\\AppData\\Local\\Programs\\Python\\Python310\\libs']
      NOT AVAILABLE
 
    atlas_blas_threads_info:
    Setting PTATLAS=ATLAS
      libraries ptf77blas,ptcblas,atlas not found in ['C:\\Users\\dell\\AppData\\Local\\Programs\\Python\\Python310\\lib', 'C:\\', 'C:\\Users\\dell\\AppData\\Local\\Programs\\Python\\Python310\\libs']          NOT AVAILABLE
 
    atlas_blas_info:
      libraries f77blas,cblas,atlas not found in ['C:\\Users\\dell\\AppData\\Local\\Programs\\Python\\Python310\\lib', 'C:\\', 'C:\\Users\\dell\\AppData\\Local\\Programs\\Python\\Python310\\libs']    
      NOT AVAILABLE
 
    accelerate_info:
      NOT AVAILABLE
 
    C:\Users\dell\AppData\Local\Temp\pip-install-sbzw67tu\numpy_c230f57b1797429ba07294a1b45ecda2\numpy\distutils\system_info.py:1914: UserWarning:
        Optimized (vendor) Blas libraries are not found.        
        Falls back to netlib Blas library which has worse performance.
        A better performance should be easily gained by switching
        Blas library.
      if self._calc_info(blas):
    blas_info:
      libraries blas not found in ['C:\\Users\\dell\\AppData\\Local\\Programs\\Python\\Python310\\lib', 'C:\\', 'C:\\Users\\dell\\AppData\\Local\\Programs\\Python\\Python310\\libs']
      NOT AVAILABLE
 
    C:\Users\dell\AppData\Local\Temp\pip-install-sbzw67tu\numpy_c230f57b1797429ba07294a1b45ecda2\numpy\distutils\system_info.py:1914: UserWarning:
        Blas (http://www.netlib.org/blas/) libraries not found. 
        Directories to search for the libraries can be specified in the
        numpy/distutils/site.cfg file (section [blas]) or by setting
        the BLAS environment variable.
      if self._calc_info(blas):
    blas_src_info:
      NOT AVAILABLE
 
    C:\Users\dell\AppData\Local\Temp\pip-install-sbzw67tu\numpy_c230f57b1797429ba07294a1b45ecda2\numpy\distutils\system_info.py:1914: UserWarning:
        Blas (http://www.netlib.org/blas/) sources not found.   
        Directories to search for the sources can be specified in the
        numpy/distutils/site.cfg file (section [blas_src]) or by setting
        the BLAS_SRC environment variable.
      if self._calc_info(blas):
      NOT AVAILABLE
 
    non-existing path in 'numpy\\distutils': 'site.cfg'
    lapack_opt_info:
    lapack_mkl_info:
      libraries mkl_rt not found in ['C:\\Users\\dell\\AppData\\Local\\Programs\\Python\\Python310\\lib', 'C:\\', 'C:\\Users\\dell\\AppData\\Local\\Programs\\Python\\Python310\\libs']
      NOT AVAILABLE
 
    openblas_lapack_info:
      libraries openblas not found in ['C:\\Users\\dell\\AppData\\Local\\Programs\\Python\\Python310\\lib', 'C:\\', 'C:\\Users\\dell\\AppData\\Local\\Programs\\Python\\Python310\\libs']
      NOT AVAILABLE
 
    openblas_clapack_info:
      libraries openblas,lapack not found in ['C:\\Users\\dell\\AppData\\Local\\Programs\\Python\\Python310\\lib', 'C:\\', 'C:\\Users\\dell\\AppData\\Local\\Programs\\Python\\Python310\\libs']        
      NOT AVAILABLE
 
    flame_info:
      libraries flame not found in ['C:\\Users\\dell\\AppData\\Local\\Programs\\Python\\Python310\\lib', 'C:\\', 'C:\\Users\\dell\\AppData\\Local\\Programs\\Python\\Python310\\libs']
      NOT AVAILABLE
 
    atlas_3_10_threads_info:
    Setting PTATLAS=ATLAS
      libraries lapack_atlas not found in C:\Users\dell\AppData\Local\Programs\Python\Python310\lib
      libraries tatlas,tatlas not found in C:\Users\dell\AppData\Local\Programs\Python\Python310\lib
      libraries lapack_atlas not found in C:\
      libraries tatlas,tatlas not found in C:\
      libraries lapack_atlas not found in C:\Users\dell\AppData\Local\Programs\Python\Python310\libs
      libraries tatlas,tatlas not found in C:\Users\dell\AppData\Local\Programs\Python\Python310\libs
    <class 'numpy.distutils.system_info.atlas_3_10_threads_info'>
      NOT AVAILABLE
 
    atlas_3_10_info:
      libraries lapack_atlas not found in C:\Users\dell\AppData\Local\Programs\Python\Python310\lib
      libraries satlas,satlas not found in C:\Users\dell\AppData\Local\Programs\Python\Python310\lib
      libraries lapack_atlas not found in C:\
      libraries satlas,satlas not found in C:\
      libraries lapack_atlas not found in C:\Users\dell\AppData\Local\Programs\Python\Python310\libs
      libraries satlas,satlas not found in C:\Users\dell\AppData\Local\Programs\Python\Python310\libs
    <class 'numpy.distutils.system_info.atlas_3_10_info'>       
      NOT AVAILABLE
 
    atlas_threads_info:
    Setting PTATLAS=ATLAS
      libraries lapack_atlas not found in C:\Users\dell\AppData\Local\Programs\Python\Python310\lib
      libraries ptf77blas,ptcblas,atlas not found in C:\Users\dell\AppData\Local\Programs\Python\Python310\lib
      libraries lapack_atlas not found in C:\
      libraries ptf77blas,ptcblas,atlas not found in C:\        
      libraries lapack_atlas not found in C:\Users\dell\AppData\Local\Programs\Python\Python310\libs
      libraries ptf77blas,ptcblas,atlas not found in C:\Users\dell\AppData\Local\Programs\Python\Python310\libs
    <class 'numpy.distutils.system_info.atlas_threads_info'>    
      NOT AVAILABLE
 
    atlas_info:
      libraries lapack_atlas not found in C:\Users\dell\AppData\Local\Programs\Python\Python310\lib
      libraries f77blas,cblas,atlas not found in C:\Users\dell\AppData\Local\Programs\Python\Python310\lib
      libraries lapack_atlas not found in C:\
      libraries f77blas,cblas,atlas not found in C:\
      libraries lapack_atlas not found in C:\Users\dell\AppData\Local\Programs\Python\Python310\libs
      libraries f77blas,cblas,atlas not found in C:\Users\dell\AppData\Local\Programs\Python\Python310\libs
    <class 'numpy.distutils.system_info.atlas_info'>
      NOT AVAILABLE
 
    lapack_info:
      libraries lapack not found in ['C:\\Users\\dell\\AppData\\Local\\Programs\\Python\\Python310\\lib', 'C:\\', 'C:\\Users\\dell\\AppData\\Local\\Programs\\Python\\Python310\\libs']
      NOT AVAILABLE
 
    C:\Users\dell\AppData\Local\Temp\pip-install-sbzw67tu\numpy_c230f57b1797429ba07294a1b45ecda2\numpy\distutils\system_info.py:1748: UserWarning:
        Lapack (http://www.netlib.org/lapack/) libraries not found.
        Directories to search for the libraries can be specified in the
        numpy/distutils/site.cfg file (section [lapack]) or by setting
        the LAPACK environment variable.
      return getattr(self, '_calc_info_{}'.format(name))()      
    lapack_src_info:
      NOT AVAILABLE
 
    C:\Users\dell\AppData\Local\Temp\pip-install-sbzw67tu\numpy_c230f57b1797429ba07294a1b45ecda2\numpy\distutils\system_info.py:1748: UserWarning:
        Lapack (http://www.netlib.org/lapack/) sources not found.
        Directories to search for the sources can be specified in the
        numpy/distutils/site.cfg file (section [lapack_src]) or 

by setting
the LAPACK_SRC environment variable.
return getattr(self, 'calc_info{}'.format(name))()
NOT AVAILABLE

    numpy_linalg_lapack_lite:
      FOUND:
        language = c
        define_macros = [('HAVE_BLAS_ILP64', None), ('BLAS_SYMBOL_SUFFIX', '64_')]
 
    C:\Users\dell\AppData\Local\Temp\pip-build-env-85bxsz9j\overlay\Lib\site-packages\setuptools\_distutils\dist.py:275: UserWarning: Unknown distribution option: 'define_macros'
      warnings.warn(msg)
    running dist_info
    running build_src
    build_src
    building py_modules sources
    creating build
    creating build\src.win-amd64-3.10
    creating build\src.win-amd64-3.10\numpy
    creating build\src.win-amd64-3.10\numpy\distutils
    building library "npymath" sources
    error: Microsoft Visual C++ 14.0 is required. Get it with "Build Tools for Visual Studio": https://visualstudio.microsoft.com/downloads/
    [end of output]
  
    note: This error originates from a subprocess, and is likely not a problem with pip.
  error: metadata-generation-failed
 
  Encountered error while generating package metadata.
 
  See above for output.
 
  note: This is an issue with the package mentioned above, not pip.
  hint: See above for details.
  WARNING: You are using pip version 22.0.4; however, version 22.1 is available.
  You should consider upgrading via the 'C:\Users\dell\AppData\Local\Programs\Python\Python310\python.exe -m pip install --upgrade pip' command.
  [end of output]

note: This error originates from a subprocess, and is likely not a problem with pip.
error: subprocess-exited-with-error

× pip subprocess to install build dependencies did not run successfully.
│ exit code: 1
╰─> See above for output.

Can you please help me with it.

[hfatima08]

I'm having the same issue, have you solved it? @FareedUllah09

[callmesora]

I just removed the [0] @hfatima08 as such class_names[classid], score)

[ravindu0823]

I just removed the [0] @hfatima08 as such class_names[classid], score)

This is worked for me :)

[hfatima08]

Thanks @callmesora