mmuru opened a new issue #975:
URL: https://github.com/apache/arrow-datafusion/issues/975
**Describe the bug**
A clear and concise description of what the bug is.
Try to do local build using the steps in README.md file. The checked in
arrow-datafusion/python/requirements.txt is locked in python 3.8 version.
the step pip install -r requirements.txt throws the below exception and
failed to install dependencies.
````
Collecting typed-ast>=1.4.2
ERROR: In --require-hashes mode, all requirements must have their versions
pinned with ==. These do not:
typed-ast>=1.4.2 from
https://files.pythonhosted.org/packages/01/08/0d92feed38a4cafe45bcbd42a2507c1900e9ec1e2e9b5e5a472f8ebfa9bb/typed_ast-1.4.3-cp37-cp37m-macosx_10_9_x86_64.whl#sha256=0fb71b8c643187d7492c1f8352f2c15b4c4af3f6338f21681d3681b3dc31a266
(from black==21.7b0->-r requirements.txt (line 15))
````
**To Reproduce**
Steps to reproduce the behavior:
Python 3.7.11 version (venv)
pip install -r requirements.txt
**Expected behavior**
A clear and concise description of what you expected to happen.
It should install all the dependencies without any errors.
**Additional context**
Add any other context about the problem here.
To workaround is to generate requirements.txt using
````
pip-compile --generate-hashes requirements.in
````
Then pip install -r requirements.txt works in python 3.7
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