rpy2：最新版本在Ubuntu上不起作用

Question

[当我执行from rpy2.robjects import r时出现错误：

>>> from rpy2.robjects import r
Traceback (most recent call last):
      File "<stdin>", line 1, in <module>
      File "/usr/local/lib/python3.6/dist-packages/rpy2/robjects/__init__.py", line 27, in <module> from . import language
      File "/usr/local/lib/python3.6/dist-packages/rpy2/robjects/language.py", line 16, in <module> _str2lang = ri.baseenv['str2lang']
      File "/usr/local/lib/python3.6/dist-packages/rpy2/rinterface_lib/conversion.py", line 44, in _ cdata = function(*args, **kwargs)
      File "/usr/local/lib/python3.6/dist-packages/rpy2/rinterface_lib/_rinterface_capi.py", line 282, in _robj = function(*args, **kwargs)
      File "/usr/local/lib/python3.6/dist-packages/rpy2/rinterface_lib/sexp.py", line 355, in __getitem__
    raise KeyError("'%s' not found" % key)
KeyError: "'str2lang' not found"

但是当我降级到3.2.0版时，一切正常。

有什么想法吗？

（（Ubuntu 18.04，Python 3.6.8，rpy 3.3.2）

Answer 1

I also have this issue on mac using Jupyter Notebook 

---------------------------------------------------------------------------
KeyError                                  Traceback (most recent call last)
<ipython-input-9-4f3164afa6d1> in <module>
----> 1 from rpy2 import robjects as robjects

/usr/local/lib/python3.7/site-packages/rpy2/robjects/__init__.py in <module>
     25 from . import conversion
     26 from . import vectors
---> 27 from . import language
     28 
     29 from rpy2.rinterface import (Sexp,

/usr/local/lib/python3.7/site-packages/rpy2/robjects/language.py in <module>
     14 _reval = ri.baseenv['eval']
     15 _parse = ri.parse
---> 16 _str2lang = ri.baseenv['str2lang']
     17 
     18 

/usr/local/lib/python3.7/site-packages/rpy2/rinterface_lib/conversion.py in _(*args, **kwargs)
     42 def _cdata_res_to_rinterface(function):
     43     def _(*args, **kwargs):
---> 44         cdata = function(*args, **kwargs)
     45         # TODO: test cdata is of the expected CType
     46         return _cdata_to_rinterface(cdata)

/usr/local/lib/python3.7/site-packages/rpy2/rinterface_lib/_rinterface_capi.py in _(*args, **kwargs)
    280 def _evaluated_promise(function):
    281     def _(*args, **kwargs):
--> 282         robj = function(*args, **kwargs)
    283         if _TYPEOF(robj) == openrlib.rlib.PROMSXP:
    284             robj = openrlib.rlib.Rf_eval(

/usr/local/lib/python3.7/site-packages/rpy2/rinterface_lib/sexp.py in __getitem__(self, key)
    353         # TODO: move check of R_UnboundValue to _rinterface
    354         if res == openrlib.rlib.R_UnboundValue:
--> 355             raise KeyError("'%s' not found" % key)
    356         return res
    357 

KeyError: "'str2lang' not found"