Installation of pandas fails due to compilation error

[mhwombat]

Code Sample, a copy-pastable example if possible

#  python --version
Python 3.9.0a3
# pip3 install pandas --log amy.log

results in the error shown below. (The full installation log: amy.log)

numpy/random/mtrand/mtrand.c:43635:34: error: 'PyTypeObject' {aka 'struct _typeobject'} has no member named 'tp_print'; did you mean 'tp_dict'?

Problem description

The installation fails. I have searched the issues for "tp_print" and "mtrand.c", but I haven't found any mention of this particular error.

Expected Output

The installation should succeed.

Output of pd.show_versions()

Not applicable because pandas won't install, but here are the packages I do have installed.

#  pip3 list
Package    Version
---------- -------
numpy      1.18.1 
pip        20.0.2 
scipy      1.3.2  
setuptools 45.1.0 
wheel      0.34.2

Note: I am doing all this from a docker image using alpine linux, but I don't think that's the cause of this problem.

[jreback]

see #32045

you likely want to installed a released version

3.9 has no support atm in numpy, cython or pandas