id,node_id,number,title,user,state,locked,assignee,milestone,comments,created_at,updated_at,closed_at,author_association,active_lock_reason,draft,pull_request,body,reactions,performed_via_github_app,state_reason,repo,type
670755564,MDU6SXNzdWU2NzA3NTU1NjQ=,4294,PyInstaller executable which packages xarray throws an error when executable is run,60890,closed,0,,,2,2020-08-01T10:47:30Z,2020-08-02T07:05:15Z,2020-08-02T07:05:15Z,NONE,,,,"This might be a problem related to PyInstaller, but we are packaging a lot of packages like numpy, pandas, matplotlib, scipy, PySide2; and xarray is the only one that causes an error, so I wanted to first open the ticket here.

**What happened**:

When I run an executable that PyInstaller creates out of a script that uses xarray >= 0.14, I get this error (using xarray 0.13 does not cause this error):

```Traceback (most recent call last):
  File ""example.py"", line 2, in <module>
  File ""<frozen importlib._bootstrap>"", line 971, in _find_and_load
  File ""<frozen importlib._bootstrap>"", line 955, in _find_and_load_unlocked
  File ""<frozen importlib._bootstrap>"", line 665, in _load_unlocked
  File ""c:\users\can\pycharmprojects\pythonproject\venv4\lib\site-packages\PyInstaller\loader\pyimod03_importers.py"", line 623, in exec_module
    exec(bytecode, module.__dict__)
  File ""lib\site-packages\xarray\__init__.py"", line 3, in <module>
  File ""<frozen importlib._bootstrap>"", line 971, in _find_and_load
  File ""<frozen importlib._bootstrap>"", line 955, in _find_and_load_unlocked
  File ""<frozen importlib._bootstrap>"", line 665, in _load_unlocked
  File ""c:\users\can\pycharmprojects\pythonproject\venv4\lib\site-packages\PyInstaller\loader\pyimod03_importers.py"", line 623, in exec_module
    exec(bytecode, module.__dict__)
  File ""lib\site-packages\xarray\testing.py"", line 9, in <module>
  File ""<frozen importlib._bootstrap>"", line 971, in _find_and_load
  File ""<frozen importlib._bootstrap>"", line 955, in _find_and_load_unlocked
  File ""<frozen importlib._bootstrap>"", line 665, in _load_unlocked
  File ""c:\users\can\pycharmprojects\pythonproject\venv4\lib\site-packages\PyInstaller\loader\pyimod03_importers.py"", line 623, in exec_module
    exec(bytecode, module.__dict__)
  File ""lib\site-packages\xarray\core\dataarray.py"", line 24, in <module>
  File ""<frozen importlib._bootstrap>"", line 971, in _find_and_load
  File ""<frozen importlib._bootstrap>"", line 955, in _find_and_load_unlocked
  File ""<frozen importlib._bootstrap>"", line 665, in _load_unlocked
  File ""c:\users\can\pycharmprojects\pythonproject\venv4\lib\site-packages\PyInstaller\loader\pyimod03_importers.py"", line 623, in exec_module
    exec(bytecode, module.__dict__)
  File ""lib\site-packages\xarray\plot\__init__.py"", line 1, in <module>
  File ""<frozen importlib._bootstrap>"", line 971, in _find_and_load
  File ""<frozen importlib._bootstrap>"", line 955, in _find_and_load_unlocked
  File ""<frozen importlib._bootstrap>"", line 665, in _load_unlocked
  File ""c:\users\can\pycharmprojects\pythonproject\venv4\lib\site-packages\PyInstaller\loader\pyimod03_importers.py"", line 623, in exec_module
    exec(bytecode, module.__dict__)
  File ""lib\site-packages\xarray\plot\dataset_plot.py"", line 6, in <module>
  File ""<frozen importlib._bootstrap>"", line 971, in _find_and_load
  File ""<frozen importlib._bootstrap>"", line 955, in _find_and_load_unlocked
  File ""<frozen importlib._bootstrap>"", line 665, in _load_unlocked
  File ""c:\users\can\pycharmprojects\pythonproject\venv4\lib\site-packages\PyInstaller\loader\pyimod03_importers.py"", line 623, in exec_module
    exec(bytecode, module.__dict__)
  File ""lib\site-packages\xarray\core\alignment.py"", line 13, in <module>
  File ""<frozen importlib._bootstrap>"", line 971, in _find_and_load
  File ""<frozen importlib._bootstrap>"", line 955, in _find_and_load_unlocked
  File ""<frozen importlib._bootstrap>"", line 665, in _load_unlocked
  File ""c:\users\can\pycharmprojects\pythonproject\venv4\lib\site-packages\PyInstaller\loader\pyimod03_importers.py"", line 623, in exec_module
    exec(bytecode, module.__dict__)
  File ""lib\site-packages\xarray\core\variable.py"", line 26, in <module>
  File ""<frozen importlib._bootstrap>"", line 971, in _find_and_load
  File ""<frozen importlib._bootstrap>"", line 955, in _find_and_load_unlocked
  File ""<frozen importlib._bootstrap>"", line 665, in _load_unlocked
  File ""c:\users\can\pycharmprojects\pythonproject\venv4\lib\site-packages\PyInstaller\loader\pyimod03_importers.py"", line 623, in exec_module
    exec(bytecode, module.__dict__)
  File ""lib\site-packages\xarray\core\common.py"", line 22, in <module>
  File ""<frozen importlib._bootstrap>"", line 971, in _find_and_load
  File ""<frozen importlib._bootstrap>"", line 955, in _find_and_load_unlocked
  File ""<frozen importlib._bootstrap>"", line 665, in _load_unlocked
  File ""c:\users\can\pycharmprojects\pythonproject\venv4\lib\site-packages\PyInstaller\loader\pyimod03_importers.py"", line 623, in exec_module
    exec(bytecode, module.__dict__)
  File ""lib\site-packages\xarray\core\formatting_html.py"", line 11, in <module>
  File ""lib\site-packages\pkg_resources\__init__.py"", line 1156, in resource_string
  File ""lib\site-packages\pkg_resources\__init__.py"", line 1401, in get_resource_string
  File ""lib\site-packages\pkg_resources\__init__.py"", line 1570, in _get
  File ""c:\users\can\pycharmprojects\pythonproject\venv4\lib\site-packages\PyInstaller\loader\pyimod03_importers.py"", line 471, in get_data
    with open(path, 'rb') as fp:
FileNotFoundError: [Errno 2] No such file or directory: 'C:\\Users\\can\\PycharmProjects\\pythonProject\\dist\\example\\xarray\\static\\css\\style.css'
[2172] Failed to execute script example
```

**Minimal Complete Verifiable Example**:

Make sure xarray and PyInstaller is installed on your environment.

Create example.py:

```import numpy as np
import xarray as xr

a = xr.DataArray(np.zeros(10))
print(a)
```
on console run this command:

`pyinstaller example.py`

It will create an executable `example.exe` in a new `dist` folder. Run that executable in a command prompt to be able to see the error message.

**Anything else we need to know?**:

The error does not happen with xarray version 0.13.

**Environment**:

`xr.show_versions()` output:

```commit: None
python: 3.6.6 (v3.6.6:4cf1f54eb7, Jun 27 2018, 03:37:03) [MSC v.1900 64 bit (AMD64)]
python-bits: 64
OS: Windows
OS-release: 10
machine: AMD64
processor: AMD64 Family 23 Model 1 Stepping 1, AuthenticAMD
byteorder: little
LC_ALL: None
LANG: None
LOCALE: None.None
libhdf5: None
libnetcdf: None
xarray: 0.16.0
pandas: 1.1.0
numpy: 1.19.1
scipy: None
netCDF4: None
pydap: None
h5netcdf: None
h5py: None
Nio: None
zarr: None
cftime: None
nc_time_axis: None
PseudoNetCDF: None
rasterio: None
cfgrib: None
iris: None
bottleneck: None
dask: None
distributed: None
matplotlib: None
cartopy: None
seaborn: None
numbagg: None
pint: None
setuptools: 49.2.0
pip: 20.2
conda: None
pytest: None
IPython: None
sphinx: None
```

PyInstaller version: 3.6

</details>
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