cannot import newest eccodes version

cfgrib cannot import the newest version of eccodes. Might of course be a eccodes issue but I am not sure how I can get to the bottom of that. To reproduce:

conda install python=3.7 eccodes=2.19.0 cfgrib

import cfgrib

Traceback:

In [1]: import cfgrib
---------------------------------------------------------------------------
OSError                                   Traceback (most recent call last)
~/conda/envs/xarray_dev/lib/python3.8/site-packages/cfgrib/bindings.py in <module>
     55     try:
---> 56         lib = ffi.dlopen(libname)
     57         LOG.info("ecCodes library found using name '%s'.", libname)

~/conda/envs/xarray_dev/lib/python3.8/site-packages/cffi/api.py in dlopen(self, name, flags)
    149         with self._lock:
--> 150             lib, function_cache = _make_ffi_library(self, name, flags)
    151             self._function_caches.append(function_cache)

~/conda/envs/xarray_dev/lib/python3.8/site-packages/cffi/api.py in _make_ffi_library(ffi, libname, flags)
    831     backend = ffi._backend
--> 832     backendlib = _load_backend_lib(backend, libname, flags)
    833     #

~/conda/envs/xarray_dev/lib/python3.8/site-packages/cffi/api.py in _load_backend_lib(backend, name, flags)
    826             msg = "%s.  Additionally, %s" % (first_error, msg)
--> 827         raise OSError(msg)
    828     return backend.load_library(path, flags)

OSError: ctypes.util.find_library() did not manage to locate a library called 'libeccodes'

The above exception was the direct cause of the following exception:

RuntimeError                              Traceback (most recent call last)
~/conda/envs/xarray_dev/lib/python3.8/site-packages/cfgrib/messages.py in <module>
     36     else:
---> 37         from . import bindings as eccodes
     38 except RuntimeError:

~/conda/envs/xarray_dev/lib/python3.8/site-packages/cfgrib/bindings.py in <module>
     93 #
---> 94 CODES_TYPE_UNDEFINED = lib.GRIB_TYPE_UNDEFINED
     95 CODES_TYPE_LONG = lib.GRIB_TYPE_LONG

~/conda/envs/xarray_dev/lib/python3.8/site-packages/cfgrib/bindings.py in __getattr__(self, attr)
     42     def __getattr__(self, attr):
---> 43         raise RuntimeError(self.message) from self.exc
     44 

RuntimeError: ecCodes library not found on the system.

During handling of the above exception, another exception occurred:

ModuleNotFoundError                       Traceback (most recent call last)
<ipython-input-1-30e689ead031> in <module>
----> 1 import cfgrib

~/conda/envs/xarray_dev/lib/python3.8/site-packages/cfgrib/__init__.py in <module>
     17 
     18 # cfgrib core API depends on the ECMWF ecCodes C-library only
---> 19 from .cfmessage import CfMessage
     20 from .dataset import Dataset, DatasetBuildError, open_file, open_fileindex
     21 from .messages import Message, FileStream

~/conda/envs/xarray_dev/lib/python3.8/site-packages/cfgrib/cfmessage.py in <module>
     27 import numpy as np  # noqa
     28 
---> 29 from . import messages
     30 
     31 LOG = logging.getLogger(__name__)

~/conda/envs/xarray_dev/lib/python3.8/site-packages/cfgrib/messages.py in <module>
     37         from . import bindings as eccodes
     38 except RuntimeError:
---> 39     import pyeccodes.compat as eccodes
     40 
     41 eccodes_version = eccodes.codes_get_api_version()

ModuleNotFoundError: No module named 'pyeccodes'

[iainrussell]

Excellent, thanks for testing so quickly! It was @shahramn who did the work, I just relayed the message 😃 If it’s ok, I’ll close this issue.

[iainrussell]

Just to let you know, we are preparing an update to eccodes so that it installs to ‘lib’ on conda, at least for now