rpy2无法导入“RGL” R包

Question

要如果rgl软件包安装在R从python内负载rgl包检查，我在合并这两个问题给配方：

rpy2: check if package is installed

rpy2 importr failing with xts and quantmod

这是我放在一起MWE：

from rpy2.rinterface import RRuntimeError 
from rpy2.robjects.packages import importr 
utils = importr('utils') 

def importr_tryhard(packname, contriburl): 
    try: 
     if packname == 'rlg': 
      rgl = importr("rgl", robject_translations = {".rgl.abclines": "_rgl_abclines2"}) 
     else: 
      rpack = importr(packname) 
      print 'success' 
    except RRuntimeError: 
     print 'no pack' 
     rpack = 'none' 
    return rpack 

packname = 'rgl' 
contriburl = 'http://cran.stat.ucla.edu/' 
importr_tryhard(packname, contriburl) 

上面的代码保持与错误而失败：

rpy2.robjects.packages.LibraryError: Conflict when converting R symbol in the package "rgl" to a Python symbol (rgl.abclines -> rgl_abclines while there is already rgl_abclines) 

根据在这个问题开头的链接第二个问题给出了答案，该行：

rgl = importr("rgl", robject_translations = {".rgl.abclines": "_rgl_abclines2"}) 

要小心这个错误，但显然它不是。

我在这里做错了什么？

---

编辑

低于Spacedman注释让我意识到有上述原来的问题一个错字（if packname == 'rlg'应该if packname == 'rgl'）。纠正这个错字，我能够做的工作代码，如下所示：

from rpy2.rinterface import RRuntimeError 
from rpy2.robjects.packages import importr 
utils = importr('utils') 

def importr_tryhard(packname, contriburl): 
    try: 
     if packname == 'rgl': 
      rpack = importr("rgl", robject_translations = {"rgl.abclines": "rgl_abclines2", 
       "rgl.attrib": "rgl_attrib2", "rgl.attrib.count": "rgl_attrib_count2", 
       "rgl.bbox": "rgl_bbox2", "rgl.bg": "rgl_bg2", "rgl.clear": "rgl_clear2", 
       "rgl.dev.list": "rgl_dev_list2", "rgl.getcolorcount": "rgl_getcolorcount2", 
       "rgl.getmaterial": "rgl_getmaterial2", "rgl.ids": "rgl_ids2", 
       "rgl.init": "rgl_init2", "rgl.light": "rgl_light2", "rgl.material": "rgl_material2", 
       "rgl.pixels": "rgl_pixels2", "rgl.planes": "rgl_planes2", "rgl.pop": "rgl_pop2", 
       "rgl.postscript": "rgl_postscript2", "rgl.primitive": "rgl_primitive2", 
       "rgl.quit": "rgl_quit2", "rgl.selectstate": "rgl_selectstate2", 
       "rgl.setMouseCallbacks": "rgl_setMouseCallbacks2", "rgl.setselectstate": "rgl_setselectstate2", 
       "rgl.snapshot": "rgl_snapshot2", "rgl.spheres": "rgl_spheres2", "rgl.sprites": "rgl_sprites2", 
       "rgl.surface": "rgl_surface2", "rgl.texts": "rgl_texts2", "rgl.user2window": "rgl_user2window2", 
       "rgl.viewpoint": "rgl_viewpoint2", "rgl.window2user": "rgl_window2user2"}) 
     else: 
      rpack = importr(packname) 
     print 'success' 
    except RRuntimeError: 
     print 'no pack' 
     rpack = 'none' 
    return rpack 

packname = 'rgl' 
contriburl = 'http://cran.stat.ucla.edu/' 
importr_tryhard(packname, contriburl) 

所以它的实际工作，但它是非常繁琐和丑陋。我建议使用我在my answer below中发布的代码，这是一种更好的方式来检查已安装的软件包。

谢谢Spacedman！

Answer 1

你不能那样做。 rgl包需要一个OpenGL设备，但是在rpy2的范围内运行更像是运行无头。

Answer 2

我将Dirk的答案标记为接受，因为他是对的。尽管如此，我在这里发布自己的答案来展示我如何解决这个问题。

下面的代码：

from rpy2.robjects.packages import importr 
utils = importr('utils') 

def importr_tryhard(): 
    contriburl = 'http://cran.stat.ucla.edu/' 
    try: 
     pack_lst = utils.installed_packages() 
     rpack = list(pack_lst.rx(True, 1)) 
    except RRuntimeError: 
     rpack = [] 
    return rpack 

rpack = importr_tryhard() 
print rpack 

这将返回（存储在rpack）所有可用的软件包的R列表。

Answer 3

你几乎肯定不会修复所有创建错误的符号。在rgl的情况下，有不少可以考虑使用替代名称翻译规则来构建词典。

例如，改变'.' -> '_'到'.' -> '__'：

from rpy2.robjects.packages import importr 
base = importr('base') 
base.library('rgl') 
env = base.asNamespace('rgl') 
d = dict() 
for k in env: 
    if '.' in k: 
     new_k = k.replace('.', '__') 
     d[k] = new_k 
rgl = importr("rgl", robject_translations=d)