Install numpy for IronPython

Question

I wanted to run some code in IronPython using c#. In this code I needed to use numpy. So I tried to install it using the command below:

 ipy -X:Frames -m pip install -U numpy

Unfortunately, I get an error and a return message telling me it was a unsuccessful installation. The error message is bellow:

Using cached https://files.pythonhosted.org/packages/3a/20/c81632328b1a4e1db65f45c0a1350a9c5341fd4bbb8ea66cdd98da56fe2e/numpy-1.15.0.zip
Installing collected packages: numpy
Running setup.py install for numpy ... error
Complete output from command "C:\Program Files\IronPython 2.7\ipy.exe" -u -c "import setuptools, tokenize;__file__='c:\\users\\mbhamida\\appdata\\local\\temp\\pip-build-t61kxu\\numpy\\setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record c:\users\mbhamida\appdata\local\temp\pip-y91bz0-record\install-record.txt --single-version-externally-managed --compile:
Running from numpy source directory.

Note: if you need reliable uninstall behavior, then install
with pip instead of using `setup.py install`:

  - `pip install .`       (from a git repo or downloaded source
                           release)
  - `pip install numpy`   (last NumPy release on PyPi)


C:\Program Files\IronPython 2.7\Lib\distutils\dist.py:1: UserWarning: Unknown distribution option: 'python_requires'
  """distutils.dist
blas_opt_info:
blas_mkl_info:
customize MSVCCompiler
  libraries mkl_rt not found in ['C:\\Program Files\\IronPython 2.7\\lib']
  NOT AVAILABLE

blis_info:
customize MSVCCompiler
  libraries blis not found in ['C:\\Program Files\\IronPython 2.7\\lib']
  NOT AVAILABLE

openblas_info:
customize MSVCCompiler
customize MSVCCompiler
  libraries openblas not found in ['C:\\Program Files\\IronPython 2.7\\lib']
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "c:\users\mbhamida\appdata\local\temp\pip-build-t61kxu\numpy\setup.py", line 410, in <module>
  File "c:\users\mbhamida\appdata\local\temp\pip-build-t61kxu\numpy\numpy\distutils\core.py", line 135, in setup
  File "c:\users\mbhamida\appdata\local\temp\pip-build-t61kxu\numpy\numpy\distutils\system_info.py", line 625, in get_info
  File "c:\users\mbhamida\appdata\local\temp\pip-build-t61kxu\numpy\numpy\distutils\system_info.py", line 433, in get_info
  File "c:\users\mbhamida\appdata\local\temp\pip-build-t61kxu\numpy\numpy\distutils\system_info.py", line 625, in get_info
  File "c:\users\mbhamida\appdata\local\temp\pip-build-t61kxu\numpy\numpy\distutils\system_info.py", line 1758, in calc_info
  File "c:\users\mbhamida\appdata\local\temp\pip-build-t61kxu\numpy\numpy\distutils\fcompiler\__init__.py", line 61, in <module>
  File "c:\users\mbhamida\appdata\local\temp\pip-build-t61kxu\numpy\setup.py", line 402, in setup_package
  File "c:\users\mbhamida\appdata\local\temp\pip-build-t61kxu\numpy\setup.py", line 167, in configuration
  File "c:\users\mbhamida\appdata\local\temp\pip-build-t61kxu\numpy\numpy\distutils\misc_util.py", line 1032, in add_subpackage
  File "c:\users\mbhamida\appdata\local\temp\pip-build-t61kxu\numpy\numpy\distutils\misc_util.py", line 998, in get_subpackage
  File "c:\users\mbhamida\appdata\local\temp\pip-build-t61kxu\numpy\numpy\distutils\misc_util.py", line 940, in _get_configuration_from_setup_py
  File "numpy\setup.py", line 10, in configuration
  File "c:\users\mbhamida\appdata\local\temp\pip-build-t61kxu\numpy\numpy\distutils\misc_util.py", line 1032, in add_subpackage
  File "c:\users\mbhamida\appdata\local\temp\pip-build-t61kxu\numpy\numpy\distutils\misc_util.py", line 998, in get_subpackage
  File "c:\users\mbhamida\appdata\local\temp\pip-build-t61kxu\numpy\numpy\distutils\misc_util.py", line 940, in _get_configuration_from_setup_py
  File "numpy\core\setup.py", line 832, in configuration
  File "c:\users\mbhamida\appdata\local\temp\pip-build-t61kxu\numpy\numpy\distutils\system_info.py", line 433, in get_info
  File "c:\users\mbhamida\appdata\local\temp\pip-build-t61kxu\numpy\numpy\distutils\system_info.py", line 1621, in calc_info
TypeError: a new-style class can't have only classic bases

----------------------------------------
Command ""C:\Program Files\IronPython 2.7\ipy.exe" -u -c "import setuptools, tokenize;__file__='c:\\users\\mbhamida\\appdata\\local\\temp\\pip-build-t61kxu\\numpy\\setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record c:\users\mbhamida\appdata\local\temp\pip-y91bz0-record\install-record.txt --single-version-externally-managed --compile" failed with error code 1 in c:\users\mbhamida\appdata\local\temp\pip-build-t61kxu\numpy\

I searched a lot about a solution, but I guess it is a very common problem. Ps: I face the same problem with many other packages.

What can be the solution?

Answer 1

Python is first and foremost a language and has a default implementation in C: CPython. IronPython is another implementation of the language, based on .NET. As such, it implements the default core language and most of the standard library.

Some Python packages available through PIP are pure Python and rely on elements supported by IronPython. Some other modules are, however, specific to the implementation. In particular, numpy uses native C code, which is supported by CPython but not by IronPython. More info on the IronPython issue tracker: https://github.com/IronLanguages/ironpython2/issues/

For it to work, numpy would have to offer compatibility with .NET. I have seen a .NET refactor of numpy, but never got it working.

A solution for your problem? Avoid mixing numpy and .NET. If you find a way to make it work, though, I'm interested.

[Edit:] You might want to have a look at this answer on how to install numpy: https://stackoverflow.com/a/51900761/6690989