Encountered error while trying to install package

[GWNdrew]

• Version: x.x.x
• Python: 2.7/3.4/3.5
  Python 3.10.2 (tags/v3.10.2:a58ebcc, Jan 17 2022, 14:12:15) [MSC v.1929 64 bit (AMD64)] on win32
• OS: osx/linux/win
  Edition Windows 10 Home
  Version 21H2
  Installed on ‎2020-‎11-‎02
  OS build 19044.1645
  Experience Windows Feature Experience Pack 120.2212.4170.0

What was wrong?

• The code which produced the error
  pip (or pip3) install eth-keys does not install
• The full output of the error:

pip install eth-keys
Collecting eth-keys
Using cached eth_keys-0.4.0-py3-none-any.whl (21 kB)
Requirement already satisfied: eth-typing<4,>=3.0.0 in c:\users\xyz\appdata\local\programs\python\python310\lib\site-packages (from eth-keys) (3.0.0)
Collecting eth-utils<3.0.0,>=2.0.0
Using cached eth_utils-2.0.0-py3-none-any.whl (24 kB)
Requirement already satisfied: eth-hash<0.4.0,>=0.3.1 in c:\users\xyz\appdata\local\programs\python\python310\lib\site-packages (from eth-utils<3.0.0,>=2.0.0->eth-keys) (0.3.2)
Collecting cytoolz<1.0.0,>=0.10.1
Using cached cytoolz-0.11.2.tar.gz (481 kB)
Preparing metadata (setup.py) ... done
Requirement already satisfied: toolz>=0.8.0 in c:\users\xyz\appdata\local\programs\python\python310\lib\site-packages (from cytoolz<1.0.0,>=0.10.1->eth-utils<3.0.0,>=2.0.0->eth-keys) (0.11.2)
Using legacy 'setup.py install' for cytoolz, since package 'wheel' is not installed.
Installing collected packages: cytoolz, eth-utils, eth-keys
Running setup.py install for cytoolz ... error
error: subprocess-exited-with-error

× Running setup.py install for cytoolz did not run successfully.
│ exit code: 1
╰─> [49 lines of output]
ALERT: Cython not installed. Building without Cython.
running install
running build
running build_py
creating build
creating build\lib.win-amd64-3.10
creating build\lib.win-amd64-3.10\cytoolz
copying cytoolz\compatibility.py -> build\lib.win-amd64-3.10\cytoolz
copying cytoolz_signatures.py -> build\lib.win-amd64-3.10\cytoolz
copying cytoolz_version.py -> build\lib.win-amd64-3.10\cytoolz
copying cytoolz_init_.py -> build\lib.win-amd64-3.10\cytoolz
creating build\lib.win-amd64-3.10\cytoolz\curried
copying cytoolz\curried\exceptions.py -> build\lib.win-amd64-3.10\cytoolz\curried
copying cytoolz\curried\operator.py -> build\lib.win-amd64-3.10\cytoolz\curried
copying cytoolz\curried_init_.py -> build\lib.win-amd64-3.10\cytoolz\curried
copying cytoolz\dicttoolz.pyx -> build\lib.win-amd64-3.10\cytoolz
copying cytoolz\functoolz.pyx -> build\lib.win-amd64-3.10\cytoolz
copying cytoolz\itertoolz.pyx -> build\lib.win-amd64-3.10\cytoolz
copying cytoolz\recipes.pyx -> build\lib.win-amd64-3.10\cytoolz
copying cytoolz\utils.pyx -> build\lib.win-amd64-3.10\cytoolz
copying cytoolz\cpython.pxd -> build\lib.win-amd64-3.10\cytoolz
copying cytoolz\dicttoolz.pxd -> build\lib.win-amd64-3.10\cytoolz
copying cytoolz\functoolz.pxd -> build\lib.win-amd64-3.10\cytoolz
copying cytoolz\itertoolz.pxd -> build\lib.win-amd64-3.10\cytoolz
copying cytoolz\recipes.pxd -> build\lib.win-amd64-3.10\cytoolz
copying cytoolz\utils.pxd -> build\lib.win-amd64-3.10\cytoolz
copying cytoolz_init_.pxd -> build\lib.win-amd64-3.10\cytoolz
creating build\lib.win-amd64-3.10\cytoolz\tests
copying cytoolz\tests\dev_skip_test.py -> build\lib.win-amd64-3.10\cytoolz\tests
copying cytoolz\tests\test_compatibility.py -> build\lib.win-amd64-3.10\cytoolz\tests
copying cytoolz\tests\test_curried.py -> build\lib.win-amd64-3.10\cytoolz\tests
copying cytoolz\tests\test_curried_toolzlike.py -> build\lib.win-amd64-3.10\cytoolz\tests
copying cytoolz\tests\test_dev_skip_test.py -> build\lib.win-amd64-3.10\cytoolz\tests
copying cytoolz\tests\test_dicttoolz.py -> build\lib.win-amd64-3.10\cytoolz\tests
copying cytoolz\tests\test_docstrings.py -> build\lib.win-amd64-3.10\cytoolz\tests
copying cytoolz\tests\test_doctests.py -> build\lib.win-amd64-3.10\cytoolz\tests
copying cytoolz\tests\test_embedded_sigs.py -> build\lib.win-amd64-3.10\cytoolz\tests
copying cytoolz\tests\test_functoolz.py -> build\lib.win-amd64-3.10\cytoolz\tests
copying cytoolz\tests\test_inspect_args.py -> build\lib.win-amd64-3.10\cytoolz\tests
copying cytoolz\tests\test_itertoolz.py -> build\lib.win-amd64-3.10\cytoolz\tests
copying cytoolz\tests\test_none_safe.py -> build\lib.win-amd64-3.10\cytoolz\tests
copying cytoolz\tests\test_recipes.py -> build\lib.win-amd64-3.10\cytoolz\tests
copying cytoolz\tests\test_serialization.py -> build\lib.win-amd64-3.10\cytoolz\tests
copying cytoolz\tests\test_signatures.py -> build\lib.win-amd64-3.10\cytoolz\tests
copying cytoolz\tests\test_tlz.py -> build\lib.win-amd64-3.10\cytoolz\tests
copying cytoolz\tests\test_utils.py -> build\lib.win-amd64-3.10\cytoolz\tests
running build_ext
building 'cytoolz.dicttoolz' extension
error: Microsoft Visual C++ 14.0 or greater is required. Get it with "Microsoft C++ Build Tools": https://visualstudio.microsoft.com/visual-cpp-build-tools/
[end of output]

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

× Encountered error while trying to install package.
╰─> cytoolz

note: This is an issue with the package mentioned above, not pip.
hint: See above for output from the failure.

[fselmo]

Hey @GWNdrew, this is the relevant information from the output above:

Microsoft Visual C++ 14.0 or greater is required. Get it with "Microsoft C++ Build Tools": https://visualstudio.microsoft.com/visual-cpp-build-tools/

This is a common issue. Have you tried installing Microsoft C++ Build Tools?

[GWNdrew]

Okay thank you - honestly did not understand why python needed Visual C++
But hey whatever makes it work.
Turns out I cannot get Build Tools to install - I've asked MS to investigate.

I guess I won't be using eth-keys for a while if ever...

[fselmo]

@GWNdrew I believe this is an issue related to needing a C language compiler. Microsoft Visual C++ Build Tools (only the build tools) will install this dependency on Windows and that's why the error recommends that. For OSX, this is usually facilitated by installing xcode command line tools I believe. For Windows it gets a bit trickier. There are examples around where people had success with different methods as most of the time these errors are related to the cytoolz library or the bitarray library.

I hope one of the answers floating out there works for you. Best of luck.

[GWNdrew]

Thanks I'll wait and see if MS actually helps me with the installation.

[GWNdrew]

Good news, MS came back and said "the Microsoft Visual C++ Minimum Runtime cannot be installed successfully because an old version installed on your machine is damaged and cannot be removed.
Please download the Program Install and Uninstall troubleshooting tool and kindly follow the steps below:
https://support.microsoft.com/en-us/help/17588/fix-problems-that-block-programs-from-being-installed-or-removed "
I did try the troubleshooter but it wouldn't uninstall the pesky bad installation. I was able to remove it in "W10-add or remove programs" and then MSVC++ installed!!! I just tried pip3 install eth-keys and it successfully installed!!!
Thank you for your help

[fselmo]

Amazing. Thanks for the update. I think this may help out in troubleshooting these kinds of issues in the future. Glad you got unstuck!