Revision: 412
http://rpy.svn.sourceforge.net/rpy/?rev=412&view=rev
Author: lgautier
Date: 2008-03-03 13:28:08 -0800 (Mon, 03 Mar 2008)
Log Message:
-----------
- added pydoc strings
- fixed Renvironment
- added class for S4 object (not doing much at the moment)
- start R with --quiet
Modified Paths:
--------------
trunk/sandbox/rpy_nextgen/robjects/__init__.py
Modified: trunk/sandbox/rpy_nextgen/robjects/__init__.py
===================================================================
--- trunk/sandbox/rpy_nextgen/robjects/__init__.py 2008-03-02 19:52:28 UTC
(rev 411)
+++ trunk/sandbox/rpy_nextgen/robjects/__init__.py 2008-03-03 21:28:08 UTC
(rev 412)
@@ -1,3 +1,11 @@
+"""
+R objects as Python objects.
+
+The module is structured around the singleton r of class R,
+that represents an embedded R.
+
+"""
+
import array
import rinterface
@@ -4,8 +12,6 @@
#FIXME: close everything when leaving (check RPy for that).
-
-
def defaultPy2RMapper(self, o):
if isinstance(o, Robject):
return o._sexp
@@ -37,6 +43,8 @@
res = Rfunction(o)
elif isinstance(o, rinterface.SexpEnvironment):
res = Renvironment(o)
+ elif isinstance(o, rinterface.SexpS4):
+ res = RS4(o)
else:
res = o
return res
@@ -50,9 +58,14 @@
#FIXME: Looks hackish. inheritance should be used ?
class Robject(object):
- pass
+ def __repr__(self):
+ r.show(self)
+
class Rvector(Robject):
+ """ R vector-like object. Items in those instances can
+ be accessed with the method "__getitem__" ("[" operator),
+ or with the method "subset"."""
def __init__(self, o):
if (isinstance(o, rinterface.SexpVector)):
@@ -61,6 +74,7 @@
self._sexp = defaultPy2RMapper(self, o)
def subset(self, *args):
+ """ Subset the "R-way.", using R's "[" function """
for a in args:
if not isinstance(a, rinterface.SexpVector):
raise(TypeError("Subset only take R vectors"))
@@ -101,6 +115,11 @@
class Rfunction(Robject):
+ """ An R function (aka "closure").
+
+ The attribute "mapper" is a function that will
+ transform Python objects into Sexp objects.
+ """
mapper = defaultPy2RMapper
@@ -121,17 +140,28 @@
class Renvironment(Robject):
+ """ An R environement. """
def __init__(self, o):
if (isinstance(o, rinterface.SexpEnvironment)):
self._sexp = o
else:
raise(ValueError("Cannot instantiate"))
- def __getattr__(self, attr):
- res = self._sexp[attr]
+ def __getitem__(self, item):
+ res = self._sexp[item]
+ res = mapper(res)
return res
+class RS4(Robject):
+ def __init__(self, o):
+ if (isinstance(o, rinterface.SexpS4)):
+ self._sexp = o
+ else:
+ raise(ValueError("Cannot instantiate"))
+ def __getattr__(self, attr):
+ res = r.get("@")(self, attr)
+ return res
class R(object):
_instance = None
@@ -145,10 +175,13 @@
raise(ValueError("Only one instance of R can be created"))
def __getattribute__(self, attr):
- res = rinterface.globalEnv.get(attr)
+ return self[attr]
+
+ def __getitem__(self, item):
+ res = rinterface.globalEnv.get(item)
res = mapper(res)
return res
-r = R(["--no-save", ])
+r = R(["--no-save", "--quiet"])
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