Add build-requires pinning numpy to <2

[xmatthias]

With the release of numpy2.0, ta-lib is no longer installable (the build fails), as it's currently incompatible with numpy 2.x.

While that should be addressed too - I'm not sure it's a "quick fix" that can be done with just a few lines of code (or while keeping compatibility with older numpy versions).

i therefore think it's better to have a "quick fix" available so it's at least not breaking existing setups / installations.
Regular version-pinning is not relevant here - as it's the numpy version during build-time (a separate, isolated environment created while building a package) that's the problem currently.

Temporarily solves #655

Alternative workarounds: Disable build isolation.

pip install "numpy<2"
pip install TA-Lib -v --no-build-isolation

---

To test this:
install ta-lib (regularly, without workaround) without this fix anytime after the numpy 2.x release (don't test while time-traveling, please) - notice it failing
Install with this fix - notice the build working again.

[mmarr96]

legend, thank you!

[mrjbq7]

Thanks! I suppose this needs a new release to be useful?

[mrjbq7]

Okay, released 0.4.31 with this fix, see if that helps everyone?

[morenod]

Probably related, after upgrading talib to 0.4.31, I get:

Traceback (most recent call last):
  File "xxxx.py", line 11, in <module>
    from libs.ta import TA
  File "xxx/ta.py", line 3, in <module>
    import talib
  File "/home/runner/.local/lib/python3.10/site-packages/talib/__init__.py", line 93, in <module>
    from ._ta_lib import (
  File "talib/_ta_lib.pyx", line 1, in init talib._ta_lib
ValueError: numpy.dtype size changed, may indicate binary incompatibility. Expected 96 from C header, got 88 from PyObject

Collecting TA-Lib (from -r ./requirements.txt (line 2))
  Downloading TA-Lib-0.4.31.tar.gz (368 kB)
     ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 368.5/368.5 kB 2.8 MB/s eta 0:00:00
  Installing build dependencies: started
  Installing build dependencies: finished with status 'done'
  Getting requirements to build wheel: started
  Getting requirements to build wheel: finished with status 'done'
  Preparing metadata (pyproject.toml): started
  Preparing metadata (pyproject.toml): finished with status 'done'
Requirement already satisfied: numpy in /home/runner/.local/lib/python3.10/site-packages (from TA-Lib->-r ./requirements.txt (line 2)) (2.0.0)
Building wheels for collected packages: TA-Lib
  Building wheel for TA-Lib (pyproject.toml): started
  Building wheel for TA-Lib (pyproject.toml): finished with status 'done'
  Created wheel for TA-Lib: filename=TA_Lib-0.4.31-cp310-cp310-linux_x86_64.whl size=2063332 sha256=6906642f6ba091db8850fa0ed115f4012ed900b80fb76c1f4cc05925027036c0
  Stored in directory: /home/runner/.cache/pip/wheels/a4/dc/b0/8860882f03d5b3498c7f640840c037569ed2285a30ff3a48e9
Successfully built TA-Lib
Installing collected packages: TA-Lib, elastic-transport, elasticsearch
Successfully installed TA-Lib-0.4.31

[xmatthias]

@morenod you'll still need to have numpy <2.0.0 installed - the error looks like it's using latest ...

[morenod]

numpy

yep, fixed setting numpy<2 on requirements.txt

thanks!