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#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
#
# High level module for managing the lookup of R objects.
#
# $Id: rpy.py,v 1.13 2004/12/23 00:01:26 warnes Exp $
#
#
from __future__ import nested_scopes
import rpy_io
import UserDict
import time, os, sys
# If we cannot import Numeric, it should have been detected at
# installation time and RPy should have been compiled properly. So,
# don't complain.
try:
from Numeric import *
except ImportError:
pass
# try to import rpy binary library using current path
try:
import _rpy
except ImportError:
if sys.platform == 'win32':
import win32api, win32con
hkey = win32api.RegOpenKeyEx( win32con.HKEY_LOCAL_MACHINE,
"Software\\R-core\\R",
0, win32con.KEY_QUERY_VALUE )
# get the base directory
rpath = win32api.RegQueryValueEx( hkey, "InstallPath" )[0]
win32api.RegCloseKey( hkey )
Rlib = os.path.join( rpath, 'bin', 'R.dll')
# Now, load the library into the python address space and retry the
# import
win32api.LoadLibraryEx( Rlib, 0,
win32con.LOAD_WITH_ALTERED_SEARCH_PATH )
import _rpy
else:
raise
# Version
from rpy_version import rpy_version
# Symbolic names for conversion modes
PROC_CONVERSION = 3
CLASS_CONVERSION = 2
BASIC_CONVERSION = 1
NO_CONVERSION = 0
NO_DEFAULT = -1
# Wrap a function in safe modes to avoid infinite recursion when
# called from within the conversion system
def with_mode(i, fun):
def f(*args, **kwds):
try:
e = get_default_mode()
set_default_mode(i)
return fun(*args, **kwds)
finally:
set_default_mode(e)
return f
# Manage the global mode
def set_default_mode(mode):
_rpy.set_mode(mode)
def get_default_mode():
return _rpy.get_mode()
# The new exception
RException = _rpy.RException
# I/O setters
set_rpy_output = _rpy.set_output
set_rpy_input = _rpy.set_input
get_rpy_output = _rpy.get_output
get_rpy_input = _rpy.get_input
if sys.platform != 'win32':
set_rpy_showfiles = _rpy.set_showfiles
get_rpy_showfiles = _rpy.get_showfiles
# Default I/O to functions in the 'rpy_io' module
set_rpy_output(rpy_io.rpy_output)
set_rpy_input(rpy_io.rpy_input)
if sys.platform != 'win32':
set_rpy_showfiles(rpy_io.rpy_showfiles)
# Functions for processing events
import threading
r_events = _rpy.r_events
_r_thread = None
_r_events_running = threading.Event()
_r_lock = threading.Lock()
def r_eventloop():
while _r_events_running.isSet():
_r_lock.acquire()
r_events()
_r_lock.release()
time.sleep(0.2)
def start_r_eventloop():
global _r_thread
if _r_thread and _r_thread.isAlive():
return
_r_thread = threading.Thread(target=r_eventloop)
_r_thread.setDaemon(1)
_r_events_running.set()
_r_thread.start()
return _r_thread
def stop_r_eventloop():
_r_events_running.clear()
if sys.platform != 'win32':
start_r_eventloop()
# This function unifies the case of results of length one, which RPy
# returns as single values, and results of length greater than one,
# which are lists.
def as_list(obj):
try:
obj+[]
return obj
except:
return [obj]
# A special dict to wrap the arguments in safe modes. It would be
# easier with 2.2, subclassing directly from type 'dict'.
class Dict_With_Mode(UserDict.UserDict):
def __init__(self, initialdata):
self.data = initialdata
def __setitem__(self, key, value):
val = with_mode(BASIC_CONVERSION, value)
if type(key) in [type(''), type(())]:
self.data[key] = val
else:
self.data[with_mode(BASIC_CONVERSION, key)] = val
# Tables for {PROC,CLASS}_CONVERSION modes
class_table = Dict_With_Mode(_rpy.__class_table__)
proc_table = Dict_With_Mode(_rpy.__proc_table__)
# main class
class R:
def __init__(self):
_rpy.set_mode(NO_DEFAULT)
self.TRUE = self.__getitem__('T')
self.FALSE = self.__getitem__('F')
def __getattr__(self, name):
if len(name) > 1 and name[-1] == '_' and name[-2] != '_':
name = name[:-1]
name = name.replace('__', '<-')
name = name.replace('_', '.')
return self.__getitem__(name)
def __getitem__(self, name):
obj = self.__dict__[name] = self.__dict__.get(name, _rpy.get(name))
return obj
def __call__(self, s):
return r.eval(r.parse(text=s))
# main instance
r = R()
# disable the printing of errors from within R, they will be handed by
# passing a fault to python
r.options(show_error_messages=0)
# That's all...
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