Issue with Python

[Ifeanyi Obinelo]

Hello! I am a Python programmer and I love the language. However, I
installed Python 3.9 and suddenly, pip does not install Python libraries
anymore. It says that I need Visual Studio C++ 2014 and exits with:

"ERROR: Command errored out with exit status 1:..error: Microsoft Visual
C++ 14.0 is required. Get it with "Build Tools for Visual Studio":
https://visualstudio.microsoft.com/downloads/"
(The complete output is about 302 lines long. I will attach at the end of
the email.)

But I never needed Visual C++ 14 to install modules. Plus I have a bunch of
C++ redistributables (but not 14). Is there any thing I can do to fix this?

Also, is there any way to carry over my libraries and modules from my
previous Python installation (Python 3.8.5)? Or do I need to manually
reinstall them?

Thank you for your help. Python is awesome!

CMD OUTPUT BELOW...

C:\Users\USER-1>pip install pandas
Defaulting to user installation because normal site-packages is not
writeable
Collecting pandas
Using cached pandas-1.1.3.tar.gz (5.2 MB)
Installing build dependencies ... error
ERROR: Command errored out with exit status 1:
command: 'c:\program files\python39\python.exe' 'c:\program
files\python39\lib\site-packages\pip' install --ignore-installed --no-user
--prefix
'C:\Users\USER-1\AppData\Local\Temp\pip-build-env-mhg8fpe_\overlay'
--no-warn-script-location --no-binary :none: --only-binary :none: -i
https://pypi.org/simple -- setuptools wheel 'Cython>=0.29.21,<3'
'numpy==1.15.4; python_version=='"'"'3.6'"'"' and
platform_system!='"'"'AIX'"'"'' 'numpy==1.15.4;
python_version=='"'"'3.7'"'"' and platform_system!='"'"'AIX'"'"''
'numpy==1.17.3; python_version>='"'"'3.8'"'"' and
platform_system!='"'"'AIX'"'"'' 'numpy==1.16.0;
python_version=='"'"'3.6'"'"' and platform_system=='"'"'AIX'"'"''
'numpy==1.16.0; python_version=='"'"'3.7'"'"' and
platform_system=='"'"'AIX'"'"'' 'numpy==1.17.3;
python_version>='"'"'3.8'"'"' and platform_system=='"'"'AIX'"'"''
cwd: None
Complete output (302 lines):
Ignoring numpy: markers 'python_version == "3.6" and platform_system !=
"AIX"' don't match your environment
Ignoring numpy: markers 'python_version == "3.7" and platform_system !=
"AIX"' don't match your environment
Ignoring numpy: markers 'python_version == "3.6" and platform_system ==
"AIX"' don't match your environment
Ignoring numpy: markers 'python_version == "3.7" and platform_system ==
"AIX"' don't match your environment
Ignoring numpy: markers 'python_version >= "3.8" and platform_system ==
"AIX"' don't match your environment
Collecting setuptools
Using cached setuptools-50.3.2-py3-none-any.whl (785 kB)
Collecting wheel
Using cached wheel-0.35.1-py2.py3-none-any.whl (33 kB)
Collecting Cython<3,>=0.29.21
Using cached Cython-0.29.21-py2.py3-none-any.whl (974 kB)
Collecting numpy==1.17.3
Using cached numpy-1.17.3.zip (6.4 MB)
Using legacy 'setup.py install' for numpy, since package 'wheel' is not
installed.
Installing collected packages: setuptools, wheel, Cython, numpy
Running setup.py install for numpy: started
Running setup.py install for numpy: finished with status 'error'
ERROR: Command errored out with exit status 1:
command: 'c:\program files\python39\python.exe' -u -c 'import sys,
setuptools, tokenize; sys.argv[0] =
'"'"'C:\\Users\\USER-1\\AppData\\Local\\Temp\\pip-install-vtk9r3ug\\numpy\\setup.py'"'"';
__file__='"'"'C:\\Users\\USER-1\\AppData\\Local\\Temp\\pip-install-vtk9r3ug\\numpy\\setup.py'"'"';f=getattr(tokenize,
'"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"',
'"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))'
install --record
'C:\Users\USER-1\AppData\Local\Temp\pip-record-1i78k7r5\install-record.txt'
--single-version-externally-managed --prefix
'C:\Users\USER-1\AppData\Local\Temp\pip-build-env-mhg8fpe_\overlay'
--compile --install-headers
'C:\Users\USER-1\AppData\Local\Temp\pip-build-env-mhg8fpe_\overlay\Include\numpy'
cwd:
C:\Users\USER-1\AppData\Local\Temp\pip-install-vtk9r3ug\numpy\
Complete output (277 lines):
Running from numpy source directory.

Note: if you need reliable uninstall behavior, then install
with pip instead of using `setup.py install`:

- `pip install .` (from a git repo or downloaded source
release)
- `pip install numpy` (last NumPy release on PyPi)


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:\\program files\\python39\\lib',
'C:\\', 'c:\\program files\\python39\\libs']
NOT AVAILABLE

blis_info:
No module named 'numpy.distutils._msvccompiler' in numpy.distutils;
trying from distutils
customize MSVCCompiler
libraries blis not found in ['c:\\program files\\python39\\lib',
'C:\\', 'c:\\program files\\python39\\libs']
NOT AVAILABLE

openblas_info:
No module named 'numpy.distutils._msvccompiler' in numpy.distutils;
trying from distutils
customize MSVCCompiler
No module named 'numpy.distutils._msvccompiler' in numpy.distutils;
trying from distutils
customize MSVCCompiler
libraries openblas not found in ['c:\\program
files\\python39\\lib', 'C:\\', 'c:\\program files\\python39\\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
No module named 'numpy.distutils._msvccompiler' in numpy.distutils;
trying from distutils
customize MSVCCompiler
libraries tatlas not found in ['c:\\program files\\python39\\lib',
'C:\\', 'c:\\program files\\python39\\libs']
NOT AVAILABLE

atlas_3_10_blas_info:
No module named 'numpy.distutils._msvccompiler' in numpy.distutils;
trying from distutils
customize MSVCCompiler
libraries satlas not found in ['c:\\program files\\python39\\lib',
'C:\\', 'c:\\program files\\python39\\libs']
NOT AVAILABLE

atlas_blas_threads_info:
Setting PTATLAS=ATLAS
No module named 'numpy.distutils._msvccompiler' in numpy.distutils;
trying from distutils
customize MSVCCompiler
libraries ptf77blas,ptcblas,atlas not found in ['c:\\program
files\\python39\\lib', 'C:\\', 'c:\\program files\\python39\\libs']
NOT AVAILABLE

atlas_blas_info:
No module named 'numpy.distutils._msvccompiler' in numpy.distutils;
trying from distutils
customize MSVCCompiler
libraries f77blas,cblas,atlas not found in ['c:\\program
files\\python39\\lib', 'C:\\', 'c:\\program files\\python39\\libs']
NOT AVAILABLE

accelerate_info:
NOT AVAILABLE


C:\Users\USER-1\AppData\Local\Temp\pip-install-vtk9r3ug\numpy\numpy\distutils\system_info.py:690:
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.
self.calc_info()
blas_info:
No module named 'numpy.distutils._msvccompiler' in numpy.distutils;
trying from distutils
customize MSVCCompiler
libraries blas not found in ['c:\\program files\\python39\\lib',
'C:\\', 'c:\\program files\\python39\\libs']
NOT AVAILABLE


C:\Users\USER-1\AppData\Local\Temp\pip-install-vtk9r3ug\numpy\numpy\distutils\system_info.py:690:
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.
self.calc_info()
blas_src_info:
NOT AVAILABLE


C:\Users\USER-1\AppData\Local\Temp\pip-install-vtk9r3ug\numpy\numpy\distutils\system_info.py:690:
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.
self.calc_info()
NOT AVAILABLE

'svnversion' is not recognized as an internal or external command,
operable program or batch file.
non-existing path in 'numpy\\distutils': 'site.cfg'
lapack_opt_info:
lapack_mkl_info:
No module named 'numpy.distutils._msvccompiler' in numpy.distutils;
trying from distutils
customize MSVCCompiler
libraries mkl_rt not found in ['c:\\program files\\python39\\lib',
'C:\\', 'c:\\program files\\python39\\libs']
NOT AVAILABLE

openblas_lapack_info:
No module named 'numpy.distutils._msvccompiler' in numpy.distutils;
trying from distutils
customize MSVCCompiler
No module named 'numpy.distutils._msvccompiler' in numpy.distutils;
trying from distutils
customize MSVCCompiler
libraries openblas not found in ['c:\\program
files\\python39\\lib', 'C:\\', 'c:\\program files\\python39\\libs']
NOT AVAILABLE

openblas_clapack_info:
No module named 'numpy.distutils._msvccompiler' in numpy.distutils;
trying from distutils
customize MSVCCompiler
No module named 'numpy.distutils._msvccompiler' in numpy.distutils;
trying from distutils
customize MSVCCompiler
libraries openblas,lapack not found in ['c:\\program
files\\python39\\lib', 'C:\\', 'c:\\program files\\python39\\libs']
NOT AVAILABLE

flame_info:
No module named 'numpy.distutils._msvccompiler' in numpy.distutils;
trying from distutils
customize MSVCCompiler
libraries flame not found in ['c:\\program files\\python39\\lib',
'C:\\', 'c:\\program files\\python39\\libs']
NOT AVAILABLE

atlas_3_10_threads_info:
Setting PTATLAS=ATLAS
No module named 'numpy.distutils._msvccompiler' in numpy.distutils;
trying from distutils
customize MSVCCompiler
libraries lapack_atlas not found in c:\program files\python39\lib
No module named 'numpy.distutils._msvccompiler' in numpy.distutils;
trying from distutils
customize MSVCCompiler
libraries tatlas,tatlas not found in c:\program files\python39\lib
No module named 'numpy.distutils._msvccompiler' in numpy.distutils;
trying from distutils
customize MSVCCompiler
libraries lapack_atlas not found in C:\
No module named 'numpy.distutils._msvccompiler' in numpy.distutils;
trying from distutils
customize MSVCCompiler
libraries tatlas,tatlas not found in C:\
No module named 'numpy.distutils._msvccompiler' in numpy.distutils;
trying from distutils
customize MSVCCompiler
libraries lapack_atlas not found in c:\program files\python39\libs
No module named 'numpy.distutils._msvccompiler' in numpy.distutils;
trying from distutils
customize MSVCCompiler
libraries tatlas,tatlas not found in c:\program files\python39\libs
<class 'numpy.distutils.system_info.atlas_3_10_threads_info'>
NOT AVAILABLE

atlas_3_10_info:
No module named 'numpy.distutils._msvccompiler' in numpy.distutils;
trying from distutils
customize MSVCCompiler
libraries lapack_atlas not found in c:\program files\python39\lib
No module named 'numpy.distutils._msvccompiler' in numpy.distutils;
trying from distutils
customize MSVCCompiler
libraries satlas,satlas not found in c:\program files\python39\lib
No module named 'numpy.distutils._msvccompiler' in numpy.distutils;
trying from distutils
customize MSVCCompiler
libraries lapack_atlas not found in C:\
No module named 'numpy.distutils._msvccompiler' in numpy.distutils;
trying from distutils
customize MSVCCompiler
libraries satlas,satlas not found in C:\
No module named 'numpy.distutils._msvccompiler' in numpy.distutils;
trying from distutils
customize MSVCCompiler
libraries lapack_atlas not found in c:\program files\python39\libs
No module named 'numpy.distutils._msvccompiler' in numpy.distutils;
trying from distutils
customize MSVCCompiler
libraries satlas,satlas not found in c:\program files\python39\libs
<class 'numpy.distutils.system_info.atlas_3_10_info'>
NOT AVAILABLE

atlas_threads_info:
Setting PTATLAS=ATLAS
No module named 'numpy.distutils._msvccompiler' in numpy.distutils;
trying from distutils
customize MSVCCompiler
libraries lapack_atlas not found in c:\program files\python39\lib
No module named 'numpy.distutils._msvccompiler' in numpy.distutils;
trying from distutils
customize MSVCCompiler
libraries ptf77blas,ptcblas,atlas not found in c:\program
files\python39\lib
No module named 'numpy.distutils._msvccompiler' in numpy.distutils;
trying from distutils
customize MSVCCompiler
libraries lapack_atlas not found in C:\
No module named 'numpy.distutils._msvccompiler' in numpy.distutils;
trying from distutils
customize MSVCCompiler
libraries ptf77blas,ptcblas,atlas not found in C:\
No module named 'numpy.distutils._msvccompiler' in numpy.distutils;
trying from distutils
customize MSVCCompiler
libraries lapack_atlas not found in c:\program files\python39\libs
No module named 'numpy.distutils._msvccompiler' in numpy.distutils;
trying from distutils
customize MSVCCompiler
libraries ptf77blas,ptcblas,atlas not found in c:\program
files\python39\libs
<class 'numpy.distutils.system_info.atlas_threads_info'>
NOT AVAILABLE

atlas_info:
No module named 'numpy.distutils._msvccompiler' in numpy.distutils;
trying from distutils
customize MSVCCompiler
libraries lapack_atlas not found in c:\program files\python39\lib
No module named 'numpy.distutils._msvccompiler' in numpy.distutils;
trying from distutils
customize MSVCCompiler
libraries f77blas,cblas,atlas not found in c:\program
files\python39\lib
No module named 'numpy.distutils._msvccompiler' in numpy.distutils;
trying from distutils
customize MSVCCompiler
libraries lapack_atlas not found in C:\
No module named 'numpy.distutils._msvccompiler' in numpy.distutils;
trying from distutils
customize MSVCCompiler
libraries f77blas,cblas,atlas not found in C:\
No module named 'numpy.distutils._msvccompiler' in numpy.distutils;
trying from distutils
customize MSVCCompiler
libraries lapack_atlas not found in c:\program files\python39\libs
No module named 'numpy.distutils._msvccompiler' in numpy.distutils;
trying from distutils
customize MSVCCompiler
libraries f77blas,cblas,atlas not found in c:\program
files\python39\libs
<class 'numpy.distutils.system_info.atlas_info'>
NOT AVAILABLE

lapack_info:
No module named 'numpy.distutils._msvccompiler' in numpy.distutils;
trying from distutils
customize MSVCCompiler
libraries lapack not found in ['c:\\program files\\python39\\lib',
'C:\\', 'c:\\program files\\python39\\libs']
NOT AVAILABLE


C:\Users\USER-1\AppData\Local\Temp\pip-install-vtk9r3ug\numpy\numpy\distutils\system_info.py:1712:
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.
if getattr(self, '_calc_info_{}'.format(lapack))():
lapack_src_info:
NOT AVAILABLE


C:\Users\USER-1\AppData\Local\Temp\pip-install-vtk9r3ug\numpy\numpy\distutils\system_info.py:1712:
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.
if getattr(self, '_calc_info_{}'.format(lapack))():
NOT AVAILABLE

c:\program files\python39\lib\distutils\dist.py:274: UserWarning:
Unknown distribution option: 'define_macros'
warnings.warn(msg)
running install
running build
running config_cc
unifing config_cc, config, build_clib, build_ext, build commands
--compiler options
running config_fc
unifing config_fc, config, build_clib, build_ext, build commands
--fcompiler options
running build_src
build_src
building py_modules sources
creating build
creating build\src.win-amd64-3.9
creating build\src.win-amd64-3.9\numpy
creating build\src.win-amd64-3.9\numpy\distutils
building library "npymath" sources
No module named 'numpy.distutils._msvccompiler' in numpy.distutils;
trying from distutils
error: Microsoft Visual C++ 14.0 is required. Get it with "Build
Tools for Visual Studio": https://visualstudio.microsoft.com/downloads/
----------------------------------------
ERROR: Command errored out with exit status 1: 'c:\program
files\python39\python.exe' -u -c 'import sys, setuptools, tokenize;
sys.argv[0] =
'"'"'C:\\Users\\USER-1\\AppData\\Local\\Temp\\pip-install-vtk9r3ug\\numpy\\setup.py'"'"';
__file__='"'"'C:\\Users\\USER-1\\AppData\\Local\\Temp\\pip-install-vtk9r3ug\\numpy\\setup.py'"'"';f=getattr(tokenize,
'"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"',
'"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))'
install --record
'C:\Users\USER-1\AppData\Local\Temp\pip-record-1i78k7r5\install-record.txt'
--single-version-externally-managed --prefix
'C:\Users\USER-1\AppData\Local\Temp\pip-build-env-mhg8fpe_\overlay'
--compile --install-headers
'C:\Users\USER-1\AppData\Local\Temp\pip-build-env-mhg8fpe_\overlay\Include\numpy'
Check the logs for full command output.
WARNING: You are using pip version 20.2.3; however, version 20.2.4 is
available.
You should consider upgrading via the 'c:\program
files\python39\python.exe -m pip install --upgrade pip' command.
----------------------------------------
ERROR: Command errored out with exit status 1: 'c:\program
files\python39\python.exe' 'c:\program
files\python39\lib\site-packages\pip' install --ignore-installed --no-user
--prefix
'C:\Users\USER-1\AppData\Local\Temp\pip-build-env-mhg8fpe_\overlay'
--no-warn-script-location --no-binary :none: --only-binary :none: -i
https://pypi.org/simple -- setuptools wheel 'Cython>=0.29.21,<3'
'numpy==1.15.4; python_version=='"'"'3.6'"'"' and
platform_system!='"'"'AIX'"'"'' 'numpy==1.15.4;
python_version=='"'"'3.7'"'"' and platform_system!='"'"'AIX'"'"''
'numpy==1.17.3; python_version>='"'"'3.8'"'"' and
platform_system!='"'"'AIX'"'"'' 'numpy==1.16.0;
python_version=='"'"'3.6'"'"' and platform_system=='"'"'AIX'"'"''
'numpy==1.16.0; python_version=='"'"'3.7'"'"' and
platform_system=='"'"'AIX'"'"'' 'numpy==1.17.3;
python_version>='"'"'3.8'"'"' and platform_system=='"'"'AIX'"'"'' Check the
logs for full command output.
WARNING: You are using pip version 20.2.3; however, version 20.2.4 is
available.
You should consider upgrading via the 'c:\program files\python39\python.exe
-m pip install --upgrade pip' command.

[Mats Wichmann]

Post by Ifeanyi Obinelo
Hello! I am a Python programmer and I love the language. However, I
installed Python 3.9 and suddenly, pip does not install Python libraries
"ERROR: Command errored out with exit status 1:..error: Microsoft Visual
https://visualstudio.microsoft.com/downloads/"
(The complete output is about 302 lines long. I will attach at the end of
the email.)
But I never needed Visual C++ 14 to install modules. Plus I have a bunch of
C++ redistributables (but not 14). Is there any thing I can do to fix this?
Also, is there any way to carry over my libraries and modules from my
previous Python installation (Python 3.8.5)? Or do I need to manually
reinstall them?

Sometimes it's good to be a little patient!

*Some* modules, certainly not all, use compiled binary components.
Usually if they're big and consider they have performance-critical
elements, so they use the C API to make binary bits. When pip goes to
install, it tries to find a wheel that matches your configuration. If
there are no binary bits, an "any" type wheel will work fine, and there
are no issues. If there are binary bits, it looks for a combination of
python version, architecture, and maybe bit-ness. Failing to find a
suitable wheel, it pulls the source distribution and tries to install
that (by calling setup.py), and that will try to compile.

Since Windows doesn't come with a C compiler by default, that fails for
you. You could be ambitious and install Visual Studio Build Tools
(Community edition) or some such, and hope it works; it usually doesn't
without further setup.

Check if modules you care about exist for 3.9 by searching for them on
pypi.org and clicking on Download to see the available versions. The
projects you care about will inevitably catch up, but it's still early
days for 3.9 and they have their own release processes to go through.

Or you can look on an unofficial site that does early builds - take to
heart the warning about the unsupported nature of these and tread carefully:

https://www.lfd.uci.edu/~gohlke/pythonlibs/#scikit-image

Or... stick with 3.8 for a while longer, there's nothing at all wrong
with 3.8!

"Do I need to manually reinstall" - get pip to dump out the modules into
a requirements.txt file, and use that to populate your new environment.
Then at least it won't be manual.