bug while importing rpy2: cannot open shared object file: No such file or directory

[wanlinjuan]

I have successfully installed rpy2, but have trouble while importing rpy2. Here are my codes:

import os, sys
import rpy2
from rpy2.robjects import r
# %load_ext rpy2.ipython

---------------------------------------------------------------------------
ModuleNotFoundError                       Traceback (most recent call last)
~/.local/lib/python3.7/site-packages/rpy2/rinterface_lib/openrlib.py in <module>
     13     try:
---> 14         import _rinterface_cffi_api as _rinterface_cffi
     15     except ImportError:

ModuleNotFoundError: No module named '_rinterface_cffi_api'

During handling of the above exception, another exception occurred:

ImportError                               Traceback (most recent call last)
/tmp/ipykernel_88811/4253977157.py in <module>
     15 
     16 import rpy2
---> 17 from rpy2.robjects import r
     18 # %load_ext rpy2.ipython
     19 

~/.local/lib/python3.7/site-packages/rpy2/robjects/__init__.py in <module>
     14 from functools import partial
     15 import types
---> 16 import rpy2.rinterface as rinterface
     17 import rpy2.rlike.container as rlc
     18 

~/.local/lib/python3.7/site-packages/rpy2/rinterface.py in <module>
     10 import warnings
     11 from typing import Union
---> 12 from rpy2.rinterface_lib import openrlib
     13 import rpy2.rinterface_lib._rinterface_capi as _rinterface
     14 import rpy2.rinterface_lib.embedded as embedded

~/.local/lib/python3.7/site-packages/rpy2/rinterface_lib/openrlib.py in <module>
     14         import _rinterface_cffi_api as _rinterface_cffi
     15     except ImportError:
---> 16         import _rinterface_cffi_abi as _rinterface_cffi
     17 
     18 ffi = _rinterface_cffi.ffi

~/.local/lib/python3.7/site-packages/_rinterface_cffi_abi.py in <module>
      1 # auto-generated file
----> 2 import _cffi_backend
      3 
      4 ffi = _cffi_backend.FFI('_rinterface_cffi_abi',
      5     _version = 0x2601,

ImportError: libffi.so.7: cannot open shared object file: No such file or directory

I already tried conda install cffi, and it seems like a sucesss. But still the same error.

Thank you so much!

[lgautier]

This seems odd. Did you install rpy2 and cffi the same way?

[wanlinjuan]

This seems odd. Did you install rpy2 and cffi the same way?

Yes! I confirm I have successfully installed rpy2 and cffi.

[lgautier]

Did you install them the same way?