Python version >= 3.5 required ?

I can not install ImageHash on my legacy environment which uses Python 2.7.9

`$pip install ImageHash
Downloading/unpacking ImageHash
  Downloading ImageHash-4.0-py2.py3-none-any.whl (295kB): 295kB downloaded
Downloading/unpacking numpy (from ImageHash)
  Downloading numpy-1.17.0.zip (6.5MB): 6.5MB downloaded
  Running setup.py (path:/tmp/pip-build-wySIh5/numpy/setup.py) egg_info for package numpy
    Traceback (most recent call last):
      File "<string>", line 17, in <module>
      File "/tmp/pip-build-wySIh5/numpy/setup.py", line 31, in <module>
        raise RuntimeError("Python version >= 3.5 required.")
    RuntimeError: Python version >= 3.5 required.
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):

  File "<string>", line 17, in <module>

  File "/tmp/pip-build-wySIh5/numpy/setup.py", line 31, in <module>

    raise RuntimeError("Python version >= 3.5 required.")

RuntimeError: Python version >= 3.5 required.`

However, I could install it on my other machine running Python 2.7.15+

In both environments I have Pillow==6.1.0

Is there any way around it?

[JohannesBuchner]

The error indicates that this is not a imagehash issue, but pip tries to install the latest numpy version.

Install an older version of numpy. Likely your package manager has a suitable one.

[k0fi]

Yes I tried only pip because ImageHash is supposed to run inside that environment so why need to install packages globally? The machine on which ImageHash installed seamlessly (inside python 2.7 env) is Ubuntu 18.08, and the one with which I have trouble installing is Debian 9.