Why pip fails to find package even though it is available on PyPI?

Description

In a new machine (or new Python environment), when I try to install requirements from pip install -r requirements.txt I always get ERROR: Could not find a version that satisfies the requirement awswrangler==1.0.0 (for a lot of packages, not only awswrangler).

In that example, requirements.txt requires awswrangler to be in exact version 1.0.0. If you access https://pypi.org/simple/awswrangler/ you can get version 1.0.0

Why this always happens? Is there any way to force download?

Expected behavior

Get all requirements installed with exact versions in TXT file.

pip version

21.2.4

Python version

3.9.7

OS

macOS Big Sur (11.6)

How to Reproduce

1. Get a new Python environment
2. pip install from requirements.txt
3. Check the error and access PyPi simple package site.

Output

ERROR: Could not find a version that satisfies the requirement awswrangler==1.0.0 (from versions: 0.0b0, 0.0b2, 0.0b3, 0.0b4, 0.0b5, 0.0b6, 0.0b7, 0.0b8, 0.0b9, 0.0b10, 0.0b11, 0.0b12, 0.0b13, 0.0b14, 0.0b15, 0.0b16, 0.0b17, 0.0b18, 0.0b19, 0.0b20, 0.0b21, 0.0b22, 0.0b23, 0.0b24, 0.0b25, 0.0b26, 0.0b27, 0.0b28, 0.0b29, 0.0b30, 0.0b31, 0.0b32, 0.0.1, 0.0.2, 0.0.3, 0.0.4, 0.0.5, 0.0.6, 0.0.7, 0.0.8, 0.0.9, 0.0.10, 0.0.11, 0.0.12, 0.0.13, 0.0.14, 0.0.15, 0.0.16, 0.0.17, 0.0.18, 0.0.19, 0.0.20, 0.0.21, 0.0.22, 0.0.23, 0.0.24, 0.0.25, 0.1.0, 0.1.1, 0.1.2, 0.1.3, 0.1.4, 0.2.0, 0.2.1, 0.2.2, 0.2.3, 0.2.4, 0.2.5, 0.2.6, 0.3.0, 0.3.1, 0.3.2, 2.4.0, 2.5.0, 2.6.0, 2.7.0, 2.8.0, 2.9.0, 2.10.0, 2.11.0)
ERROR: No matching distribution found for awswrangler==1.0.0

Code of Conduct

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[uranusjr]

Merging this into #10421 then.

[notatallshaw]

Oh it’s explicitly in the wheels metadata:

Requires-Python: >=3.6, <3.9

Which I guess comes from this line here: https://github.com/awslabs/aws-data-wrangler/blob/1.0.0/setup.py#L24

The package maintainers for some reason put an upper limit on the Python requirement. You either need to use an older Python, upgrade which version you depend on, or fork the package and change the requirements yourself.