win7上安裝rpy2, python環境是3.6.1。
使用pip install rpy2直接安裝rpy2,對應的版本時rpy2 3.0.5
報如下錯誤:
ERROR: Complete output from command python setup.py egg_info:
ERROR: Traceback (most recent call last):
File "d:\python_virtualenv\pandas0192\lib\site-packages\cffi\cparser.py", line 276, in _parse
ast = _get_parser().parse(fullcsource)
File "d:\python_virtualenv\pandas0192\lib\site-packages\pycparser\c_parser.py", line 152, in parse
debug=debuglevel)
File "d:\python_virtualenv\pandas0192\lib\site-packages\pycparser\ply\yacc.py", line 331, in parse
return self.parseopt_notrack(input, lexer, debug, tracking, tokenfunc)
File "d:\python_virtualenv\pandas0192\lib\site-packages\pycparser\ply\yacc.py", line 1199, in parseopt_notrack
tok = call_errorfunc(self.errorfunc, errtoken, self)
File "d:\python_virtualenv\pandas0192\lib\site-packages\pycparser\ply\yacc.py", line 193, in call_errorfunc
r = errorfunc(token)
File "d:\python_virtualenv\pandas0192\lib\site-packages\pycparser\c_parser.py", line 1761, in p_error
column=self.clex.find_tok_column(p)))
File "d:\python_virtualenv\pandas0192\lib\site-packages\pycparser\plyparser.py", line 66, in _parse_error
raise ParseError("%s: %s" % (coord, msg))
pycparser.plyparser.ParseError: <cdef source string>:23:5: before: blah1
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "C:\Users\ADMINI~1\AppData\Local\Temp\pip-install-n564fvky\rpy2\setup.py", line 184, in <module>
'rpy2': ['doc/source/rpy2_logo.png', ]}
File "d:\python_virtualenv\pandas0192\lib\site-packages\setuptools\__init__.py", line 131, in setup
return distutils.core.setup(**attrs)
File "d:\program files\python361\Lib\distutils\core.py", line 108, in setup
_setup_distribution = dist = klass(attrs)
File "d:\python_virtualenv\pandas0192\lib\site-packages\setuptools\dist.py", line 370, in __init__
k: v for k, v in attrs.items()
File "d:\program files\python361\Lib\distutils\dist.py", line 281, in __init__
self.finalize_options()
File "d:\python_virtualenv\pandas0192\lib\site-packages\setuptools\dist.py", line 529, in finalize_options
ep.load()(self, ep.name, value)
File "d:\python_virtualenv\pandas0192\lib\site-packages\cffi\setuptools_ext.py", line 204, in cffi_modules
add_cffi_module(dist, cffi_module)
File "d:\python_virtualenv\pandas0192\lib\site-packages\cffi\setuptools_ext.py", line 49, in add_cffi_module
execfile(build_file_name, mod_vars)
File "d:\python_virtualenv\pandas0192\lib\site-packages\cffi\setuptools_ext.py", line 25, in execfile
exec(code, glob, glob)
File "rpy/_rinterface_cffi_build.py", line 546, in <module>
""" if os.name == 'nt' else ''
File "d:\python_virtualenv\pandas0192\lib\site-packages\cffi\api.py", line 107, in cdef
self._cdef(csource, override=override, packed=packed)
File "d:\python_virtualenv\pandas0192\lib\site-packages\cffi\api.py", line 121, in _cdef
self._parser.parse(csource, override=override, **options)
File "d:\python_virtualenv\pandas0192\lib\site-packages\cffi\cparser.py", line 315, in parse
self._internal_parse(csource)
File "d:\python_virtualenv\pandas0192\lib\site-packages\cffi\cparser.py", line 320, in _internal_parse
ast, macros, csource = self._parse(csource)
File "d:\python_virtualenv\pandas0192\lib\site-packages\cffi\cparser.py", line 278, in _parse
self.convert_pycparser_error(e, csource)
File "d:\python_virtualenv\pandas0192\lib\site-packages\cffi\cparser.py", line 307, in convert_pycparser_error
raise CDefError(msg)
cffi.error.CDefError: cannot parse "blah1 ReadConsole;"
<cdef source string>:23:5: before: blah1
----------------------------------------
ERROR: Command "python setup.py egg_info" failed with error code 1 in C:\Users\ADMINI~1\AppData\Local\Temp\pip-install-n564fvky\rpy2\
報錯的大概意思是blah1 ReadConsole;這句話無法執行, 查看文件_rinterface_cffi_build.py，發現blah1這個類的定義在_rinterface_cffi_build.py文件中並沒有。
在rpy2的最新的開源代碼中，_rinterface_cffi_build.py文件中是有關於 "blah1"這個的定義的。源碼網站地址: https://bitbucket.org/rpy2/rpy2/src/default/rpy/_rinterface_cffi_build.py
源碼上是這樣寫的:
if os.name == 'nt':
ffibuilder.cdef("""
typedef int (*blah1) (const char *, char *, int, int);
typedef void (*blah2) (const char *, int);
typedef void (*blah3) (void);
typedef void (*blah4) (const char *);
/* Return value here is expected to be 1 for Yes, -1 for No and
* 0 for Cancel: symbolic constants in graphapp.h */
typedef int (*blah5) (const char *);
typedef void (*blah6) (int);
typedef void (*blah7) (const char *, int, int);
typedef enum {RGui, RTerm, LinkDLL} UImode;
""")
然后我試了把開源代碼直接下載下來，然后使用python setup.py install方式安裝，rpy2這回可以正常安裝上了。
然后檢查一下可不可以使用:
>>> import rpy2 >>> from rpy2.robjects.packages import importr Traceback (most recent call last): File "<stdin>", line 1, in <module> File "<frozen importlib._bootstrap>", line 961, in _find_and_load File "<frozen importlib._bootstrap>", line 950, in _find_and_load_unlocked File "<frozen importlib._bootstrap>", line 646, in _load_unlocked File "<frozen importlib._bootstrap>", line 616, in _load_backward_compatible File "D:\python_virtualenv\nlp_learn\lib\site-packages\rpy2-3.1.0.dev0-py3.6.egg\rpy2\robjects\__init__.py", line 14, in <module> File "<frozen importlib._bootstrap>", line 961, in _find_and_load File "<frozen importlib._bootstrap>", line 950, in _find_and_load_unlocked File "<frozen importlib._bootstrap>", line 646, in _load_unlocked File "<frozen importlib._bootstrap>", line 616, in _load_backward_compatible File "D:\python_virtualenv\nlp_learn\lib\site-packages\rpy2-3.1.0.dev0-py3.6.egg\rpy2\rinterface.py", line 5, in <module> File "<frozen importlib._bootstrap>", line 961, in _find_and_load File "<frozen importlib._bootstrap>", line 950, in _find_and_load_unlocked File "<frozen importlib._bootstrap>", line 646, in _load_unlocked File "<frozen importlib._bootstrap>", line 616, in _load_backward_compatible File "D:\python_virtualenv\nlp_learn\lib\site-packages\rpy2-3.1.0.dev0-py3.6.egg\rpy2\rinterface_lib\openrlib.py", line 21, in <module> File "D:\python_virtualenv\nlp_learn\lib\site-packages\rpy2-3.1.0.dev0-py3.6.egg\rpy2\rinterface_lib\openrlib.py", line 16, in _dlopen_rlib File "D:\python_virtualenv\nlp_learn\lib\site-packages\rpy2-3.1.0.dev0-py3.6.egg\rpy2\situation.py", line 71, in get_rlib_path ValueError: The system "%s" is not supported.
得，(¬_¬)，這意思是不支持當前的系統。
找了一個rpy2的文檔，文檔上是這么說的:
Microsoft’s Windows - unofficial and unsupported binaries are provided by Christoph Gohlke (http://www.lfd.uci.edu/~gohlke/pythonlibs/); there is otherwise currently close to no support for this platform 文檔地址: https://rpy2.github.io/doc/latest/html/overview.html#installation
就是說rpy2不支持windows這個平台，如果想要使用，請到https://www.lfd.uci.edu/~gohlke/pythonlibs/網站上去下載一個編譯好的輪子。
這個網站上rpy2的最新版本是2.9.5, 選擇好要下載的版本，選擇好對應的系統, 下載完成后直接使用pip install + 輪子名稱即可。
問題解決,早知道我直接去下個輪子就好了，還看了半天源碼，浪費時間!!!