Issue importing ligo.skymap

[yusuf2310]

Hi! I used "pip install ligo.skymap", I've tried updating NumPy as suggested in a similar issue before, but I still get the error below. I'm using Python 3.9.7 on JupyterLab, my computer's Dell XPS 9360, Windows 10 Home v.21H2. Could you help me resolve this?

ModuleNotFoundError                       Traceback (most recent call last)
~\AppData\Local\Temp/ipykernel_28660/2355149721.py in <module>
----> 1 import ligo.skymap

ModuleNotFoundError: No module named 'ligo'

[lpsinger]

Are you using Windows Subsystem for Linux? ligo.skymap does not support native Windows installations.

[yusuf2310]

Oh, I see. No, I'm not using Windows Subsystem, it's native.

[yusuf2310]

Is installing from source the way to go, as described here: https://lscsoft.docs.ligo.org/ligo.skymap/develop.html?

[lpsinger]

Would you please try installing in a fresh virtual environment using venv, virtualenv, or their equivalent, and post all commands and output?

[lpsinger]

Is installing from source the way to go, as described here: https://lscsoft.docs.ligo.org/ligo.skymap/develop.html?

No. If you are installing on WSL, then the prebuilt wheels should be fine.

[lpsinger]

A thought: if you are following the development instructions, then try cd'ing to a directory other than the source checkout directory, then try importing.

[yusuf2310]

Would you please try installing in a fresh virtual environment using venv, virtualenv, or their equivalent, and post all commands and output?

C:\Users\crit>python -m pip install --user virtualenv
Error processing line 1 of C:\Users\crit\AppData\Local\Programs\Python\Python39\lib\site-packages\matplotlib-3.4.3-py3.9-nspkg.pth:

  Traceback (most recent call last):
    File "C:\Users\crit\AppData\Local\Programs\Python\Python39\lib\site.py", line 169, in addpackage
      exec(line)
    File "<string>", line 1, in <module>
    File "<frozen importlib._bootstrap>", line 562, in module_from_spec
  AttributeError: 'NoneType' object has no attribute 'loader'

Remainder of file ignored
Collecting virtualenv
  Downloading virtualenv-20.16.5-py3-none-any.whl (8.8 MB)
     ---------------------------------------- 8.8/8.8 MB 19.4 MB/s eta 0:00:00
Collecting filelock<4,>=3.4.1
  Downloading filelock-3.8.0-py3-none-any.whl (10 kB)
Collecting platformdirs<3,>=2.4
  Downloading platformdirs-2.5.2-py3-none-any.whl (14 kB)
Collecting distlib<1,>=0.3.5
  Downloading distlib-0.3.6-py2.py3-none-any.whl (468 kB)
     ---------------------------------------- 468.5/468.5 kB 28.6 MB/s eta 0:00:00
Installing collected packages: distlib, platformdirs, filelock, virtualenv
  WARNING: The script virtualenv.exe is installed in 'C:\Users\crit\AppData\Roaming\Python\Python39\Scripts' which is not on PATH.
  Consider adding this directory to PATH or, if you prefer to suppress this warning, use --no-warn-script-location.
Successfully installed distlib-0.3.6 filelock-3.8.0 platformdirs-2.5.2 virtualenv-20.16.5

[lpsinger]

OK, now you have virtualenv installed. Now please try creating a virtual environment and installing ligo.skymap inside of it.

[yusuf2310]

Sorry for taking much time, this is a bit new to me. I created a virtual environment "env" and installed ligo.skymap. I see some error messages.

(env) C:\Users\yusuf>py -m pip install ligo.skymap
Collecting ligo.skymap
  Using cached ligo.skymap-1.0.2.tar.gz (2.0 MB)
  Installing build dependencies ... done
  Getting requirements to build wheel ... done
  Preparing metadata (pyproject.toml) ... done
  Using cached ligo.skymap-1.0.1.tar.gz (2.0 MB)
  Installing build dependencies ... done
  Getting requirements to build wheel ... done
  Preparing metadata (pyproject.toml) ... done
  Using cached ligo.skymap-1.0.0.tar.gz (2.0 MB)
  Installing build dependencies ... done
  Getting requirements to build wheel ... done
  Preparing metadata (pyproject.toml) ... done
  Using cached ligo.skymap-0.6.1.tar.gz (2.0 MB)
  Installing build dependencies ... done
  Getting requirements to build wheel ... done
  Preparing metadata (pyproject.toml) ... done
  Using cached ligo.skymap-0.6.0.tar.gz (2.0 MB)
  Installing build dependencies ... done
  Getting requirements to build wheel ... done
  Preparing metadata (pyproject.toml) ... done
Collecting ligo-segments>=1.2.0
  Using cached ligo-segments-1.4.0.tar.gz (51 kB)
  Preparing metadata (setup.py) ... done
Collecting ligo-gracedb>=2.0.1
  Using cached ligo_gracedb-2.8.0-py2.py3-none-any.whl (2.3 MB)
Collecting numpy>=1.19.3
  Using cached numpy-1.23.3-cp39-cp39-win_amd64.whl (14.7 MB)
Collecting pillow>=2.5.0
  Downloading Pillow-9.2.0-cp39-cp39-win_amd64.whl (3.3 MB)
     ---------------------------------------- 3.3/3.3 MB 13.1 MB/s eta 0:00:00
Collecting matplotlib>=3.4.0
  Downloading matplotlib-3.6.0-cp39-cp39-win_amd64.whl (7.2 MB)
     ---------------------------------------- 7.2/7.2 MB 24.2 MB/s eta 0:00:00
Collecting astropy>=5.0
  Using cached astropy-5.1-cp39-cp39-win_amd64.whl (6.5 MB)
Collecting ptemcee
  Using cached ptemcee-1.0.0.tar.gz (17 kB)
  Preparing metadata (setup.py) ... error
  error: subprocess-exited-with-error

  × python setup.py egg_info did not run successfully.
  │ exit code: 1
  ╰─> [10 lines of output]
      Traceback (most recent call last):
        File "<string>", line 2, in <module>
        File "<pip-setuptools-caller>", line 34, in <module>
        File "C:\Users\yusuf\AppData\Local\Temp\pip-install-72acgrc0\ptemcee_b118fed39f1f42beb15df7baab91256f\setup.py", line 39, in <module>
          long_description=read('README.rst'),
        File "C:\Users\yusuf\AppData\Local\Temp\pip-install-72acgrc0\ptemcee_b118fed39f1f42beb15df7baab91256f\setup.py", line 20, in read
          return f.read()
        File "C:\Users\yusuf\AppData\Local\Programs\Python\Python39\lib\encodings\cp1252.py", line 23, in decode
          return codecs.charmap_decode(input,self.errors,decoding_table)[0]
      UnicodeDecodeError: 'charmap' codec can't decode byte 0x90 in position 449: character maps to <undefined>
      [end of output]

  note: This error originates from a subprocess, and is likely not a problem with pip.
error: metadata-generation-failed

× Encountered error while generating package metadata.
╰─> See above for output.

note: This is an issue with the package mentioned above, not pip.
hint: See above for details.

[lpsinger]

Ah, this is an issue with one of ligo.skymap's dependencies. See willvousden/ptemcee#11.