Why is pip failing to install tbb - python

I am trying to install umap-learn on my machine. But, I run into problems when installing tbb, which is a required package.
Installing from PyPI with pip
When I do,
pip install tbb
I get the error:
ERROR: Could not find a version that satisfies the requirement tbb (from versions: none)
ERROR: No matching distribution found for tbb
Downloading wheel from PyPI and installing
I downloaded the wheel from PyPI, and then tried installing directly with:
pip install tbb-2019.0-py2.py3-none-macosx_10_12_intel.macosx_10_12_x86_64.whl
I get the error:
ERROR: tbb-2019.0-py2.py3-none-macosx_10_12_intel.macosx_10_12_x86_64.whl is not
a supported wheel on this platform.
My machine is a Mac OS X El Capitan (10.11.6).
Help
Does this mean that tbb is not supported for my OS?
Is there some other package I am missing that is causing the installation to fail?
Has anyone else run into this problem?


Commenting out the tbb requirement in the requirement.txt file allows UMAP to be installed without tbb. UMAP can run without tbb, for the most part.

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Error in installing python package Flair, about a dependent package not hosted in PyPI

I am trying to install flair. It is throwing below error when executing below command:
pip install flair
ERROR: Packages installed from PyPI cannot depend on packages which are not also hosted on PyPI.
tiny-tokenizer depends on SudachiDict_core# https://object-storage.tyo2.conoha.io/v1/nc_2520839e1f9641b08211a5c85243124a/sudachi/SudachiDict_core-20190927.tar.gz
I thought installing this package explicitly might fix the error but it doesn't. The error remains same.
The installed version of SudachiDict-core is below:
SudachiDict-core 0.0.0
Below is the Environment:
OS: Windows 10
Python: 3.6 (64 bit)
Any hint is appreciated. Thank you!
Note:
First hurdle when installing flair was torch package. It was resolved simply when torch package is installed. The error looked like below:
ERROR: Could not find a version that satisfies the requirement torch>=1.1.0 (from flair) (from verERROR: No matching distribution found for torch>=1.1.0 (from flair)

You can try
pip install --upgrade git+https://github.com/zalandoresearch/flair.git
Source: https://github.com/flairNLP/flair/issues/1327#issuecomment-571639994
Or
to install separately:
pip install tiny-tokenizer
After this run:
pip install flair

It is strange running below command solved the problem.
pip install flair==0.4.3
I assume that the problem is in a latest version 0.4.4 (and its dependencies).
Note: I had torch==1.1.0 package already installed.

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I am trying to install py7zlib package, however I am getting below error:
ERROR: Could not find a version that satisfies the requirement py7zlib (from versions: none)
ERROR: No matching distribution found for py7zlib
I am using Python 3.6.
I tried:
pip install py7zlib
I would like to have this package working properly.

pip install pylzma.
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when i try to install curses-win package i head ERROR
ERROR: Could not find a version that satisfies the requirement curses-win (from versions: none)
Try to run this command from the system terminal. Make sure that you use the correct version of 'pip' installed for your Python interpreter
command output:
ERROR: Could not find a version that satisfies the requirement curses-win (from versions: none)
ERROR: No matching distribution found for curses-win
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I also tried installing the .exe file of opencv but it says:
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pip install django-graphos
Downloading/unpacking django-graphos
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Cleaning up...
No distributions matching the version for django-graphos

This is because the package has no version specified.
run this command instead:
pip install django-graphos==0.0.2a
Hope that helps!

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