Issue 1:
I am getting the 'Importing the multiarray numpy extension module failed' error message when I create a new python environment and install the python package SatPy. I have uninstalled and reinstalled numpy multiple times and created new environements as well as clone working environments. I am not sure if this issue is caused by SatPy or numpy but when I install SatPy everything breaks.

The full error message I am getting is:

ImportError Traceback (most recent call last)
~\AppData\Local\conda\conda\envs\sats\lib\site-packages\numpy\core\__init__.py in <module>
39 try:
---> 40 from . import multiarray
41 except ImportError as exc:

~\AppData\Local\conda\conda\envs\sats\lib\site-packages\numpy\core\multiarray.py in <module>
11
---> 12 from . import overrides
13 from . import _multiarray_umath

~\AppData\Local\conda\conda\envs\sats\lib\site-packages\numpy\core\overrides.py in <module>
5
----> 6 from numpy.core._multiarray_umath import (
7 add_docstring, implement_array_function, _get_implementing_args)

ImportError: DLL load failed: The specified module could not be found.

During handling of the above exception, another exception occurred:

ImportError Traceback (most recent call last)
<ipython-input-1-9619fcfabd12> in <module>
----> 1 from satpy import Scene
2 import cartopy.crs as ccrs
3 import cartopy.feature as cfeature
4 from metpy.plots import USCOUNTIES
5 from glob import glob

~\AppData\Local\conda\conda\envs\sats\lib\site-packages\satpy\__init__.py in <module>
53 CALIBRATION_ORDER = {cal: idx for idx, cal in enumerate(CALIBRATION_ORDER)}
54
---> 55 from satpy.utils import get_logger # noqa
56 from satpy.dataset import DatasetID, DATASET_KEYS # noqa
57 from satpy.readers import (DatasetDict, find_files_and_readers, # noqa

~\AppData\Local\conda\conda\envs\sats\lib\site-packages\satpy\utils.py in <module>
32 import re
33
---> 34 import numpy as np
35 import xarray.ufuncs as xu
36

~\AppData\Local\conda\conda\envs\sats\lib\site-packages\numpy\__init__.py in <module>
140 from . import _distributor_init
141
--> 142 from . import core
143 from .core import *
144 from . import compat

~\AppData\Local\conda\conda\envs\sats\lib\site-packages\numpy\core\__init__.py in <module>
69 Original error was: %s
70 """ % (sys.executable, exc)
---> 71 raise ImportError(msg)
72 finally:
73 for envkey in env_added:

ImportError:

IMPORTANT: PLEASE READ THIS FOR ADVICE ON HOW TO SOLVE THIS ISSUE!

Importing the multiarray numpy extension module failed. Most
likely you are trying to import a failed build of numpy.
Here is how to proceed:
- If you're working with a numpy git repository, try `git clean -xdf`
(removes all files not under version control) and rebuild numpy.
- If you are simply trying to use the numpy version that you have installed:
your installation is broken - please reinstall numpy.
- If you have already reinstalled and that did not fix the problem, then:
1. Check that you are using the Python you expect (you're using C:\Users\Matthew\AppData\Local\conda\conda\envs\sats\python.exe),
and that you have no directories in your PATH or PYTHONPATH that can
interfere with the Python and numpy versions you're trying to use.
2. If (1) looks fine, you can open a new issue at
https://github.com/numpy/numpy/issues. Please include details on:
- how you installed Python
- how you installed numpy
- your operating system
- whether or not you have multiple versions of Python installed
- if you built from source, your compiler versions and ideally a build log

Note: this error has many possible causes, so please don't comment on
an existing issue about this - open a new one instead.

Original error was: DLL load failed: The specified module could not be found.

I am using conda to install packages.

My numpy version is: 1.16.2

python: 3.7.3

satpy: 0.13.0

Below is other information regarding path and setup

Issue 2:
I was trying to import the skyfield library

Reproducing code example:

from skyfield.api import Topos

Error message:

Traceback (most recent call last):

File "/usr/local/lib/python3.7/dist-packages/numpy/core/init.py", line 17, in

from . import multiarray

File "/usr/local/lib/python3.7/dist-packages/numpy/core/multiarray.py", line 14, in

from . import overrides

File "/usr/local/lib/python3.7/dist-packages/numpy/core/overrides.py", line 7, in

from numpy.core._multiarray_umath import (

ImportError: libf77blas.so.3: cannot open shared object file: No such file or directory

During handling of the above exception, another exception occurred:

Traceback (most recent call last):

File "", line 1, in

File "/usr/local/lib/python3.7/dist-packages/skyfield/api.py", line 13, in

from .iokit import Loader, load_file

File "/usr/local/lib/python3.7/dist-packages/skyfield/iokit.py", line 6, in

import numpy as np

File "/usr/local/lib/python3.7/dist-packages/numpy/init.py", line 142, in

from . import core

File "/usr/local/lib/python3.7/dist-packages/numpy/core/init.py", line 47, in

raise ImportError(msg)

ImportError:

IMPORTANT: PLEASE READ THIS FOR ADVICE ON HOW TO SOLVE THIS ISSUE!

Importing the numpy c-extensions failed.

Try uninstalling and reinstalling numpy.

If you have already done that, then:

Check that you expected to use Python3.7 from "/usr/bin/python3",

and that you have no directories in your PATH or PYTHONPATH that can

interfere with the Python and numpy version "1.17.0" you're trying to use.

If (1) looks fine, you can open a new issue at

https://github.com/numpy/numpy/issues. Please include details on:

how you installed Python

how you installed numpy

your operating system

whether or not you have multiple versions of Python installed

if you built from source, your compiler versions and ideally a build log

If you're working with a numpy git repository, try git clean -xdf

(removes all files not under version control) and rebuild numpy.

Note: this error has many possible causes, so please don't comment on

an existing issue about this - open a new one instead.

Original error was: libf77blas.so.3: cannot open shared object file: No such file or directory

Numpy/Python version information:

Python 3.7.3 (default, Apr 3 2019, 05:39:12)

Successfully installed numpy-1.17.0

import numpy fails with same error