/usr/lib/x86_64-linux-gnu/root5.34/ROOT.py is in libroot-bindings-python5.34 5.34.19+dfsg-1.2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# @(#)root/pyroot:$Id$
# Author: Wim Lavrijsen (WLavrijsen@lbl.gov)
# Created: 02/20/03
# Last: 04/22/14
"""PyROOT user module.
o) install lazy ROOT class/variable lookup as appropriate
o) feed gSystem and gInterpreter for display updates
o) add readline completion (if supported by python build)
o) enable some ROOT/CINT style commands
o) handle a few special cases such as gPad, STL, etc.
o) execute rootlogon.py/.C scripts
"""
__version__ = '6.2.0'
__author__ = 'Wim Lavrijsen (WLavrijsen@lbl.gov)'
### system and interpreter setup ------------------------------------------------
import os, sys, types
## there's no version_info in 1.5.2
if sys.version[0:3] < '2.2':
raise ImportError( 'Python Version 2.2 or above is required.' )
## 2.2 has 10 instructions as default, > 2.3 has 100 ... make same
if sys.version[0:3] == '2.2':
sys.setcheckinterval( 100 )
## readline support, if available
try:
import rlcompleter, readline
class RootNameCompleter( rlcompleter.Completer ):
def file_matches( self, text ):
matches = []
path, name = os.path.split( text )
try:
for fn in os.listdir( path or os.curdir ):
if fn[:len(name)] == name:
full = os.path.join( path, fn )
matches.append( full )
if os.path.isdir( full ):
matches += map( lambda x: os.path.join( full, x ), os.listdir( full ) )
except OSError:
pass
return matches
def root_global_matches( self, text, prefix = '' ):
gClassTable = _root.GetRootGlobal( 'gClassTable' )
all = [ gClassTable.At(i) for i in xrange(gClassTable.Classes()) ]
all += [ g.GetName() for g in _root.gROOT.GetListOfGlobals() ]
matches = filter( lambda x: x[:len(text)] == text, all )
return [prefix + x for x in matches]
def global_matches( self, text ):
matches = rlcompleter.Completer.global_matches( self, text )
if not matches: matches = []
matches += self.file_matches( text )
return matches
def attr_matches( self, text ):
matches = rlcompleter.Completer.attr_matches( self, text )
if not matches: matches = []
b = text.find('.')
try:
if 0 <= b and self.namespace[text[:b]].__name__ == 'ROOT':
matches += self.root_global_matches( text[b+1:], text[:b+1] )
except AttributeError: # not all objects have a __name__
pass
return matches
readline.set_completer( RootNameCompleter().complete )
readline.set_completer_delims(
readline.get_completer_delims().replace( os.sep , '' ) )
readline.parse_and_bind( 'tab: complete' )
readline.parse_and_bind( 'set show-all-if-ambiguous On' )
except:
# module readline typically doesn't exist on non-Unix platforms
pass
## special filter on MacOS X (warnings caused by linking that is still required)
if sys.platform == 'darwin':
import warnings
warnings.filterwarnings( action='ignore', category=RuntimeWarning, module='ROOT',\
message='class \S* already in TClassTable$' )
### load PyROOT C++ extension module, special case for linux and Sun ------------
needsGlobal = ( 0 <= sys.platform.find( 'linux' ) ) or\
( 0 <= sys.platform.find( 'sunos' ) )
if needsGlobal:
# change dl flags to load dictionaries from pre-linked .so's
dlflags = sys.getdlopenflags()
sys.setdlopenflags( 0x100 | 0x2 ) # RTLD_GLOBAL | RTLD_NOW
import libPyROOT as _root
# reset dl flags if needed
if needsGlobal:
sys.setdlopenflags( dlflags )
del needsGlobal
## convince 2.2 it's ok to use the expand function
if sys.version[0:3] == '2.2':
import copy_reg
copy_reg.constructor( _root._ObjectProxy__expand__ )
## convince inspect that PyROOT method proxies are possible drop-ins for python
## methods and classes for pydoc
import inspect
inspect._old_isfunction = inspect.isfunction
def isfunction( object ):
if type(object) == _root.MethodProxy and not object.im_class:
return True
return inspect._old_isfunction( object )
inspect.isfunction = isfunction
inspect._old_ismethod = inspect.ismethod
def ismethod( object ):
if type(object) == _root.MethodProxy:
return True
return inspect._old_ismethod( object )
inspect.ismethod = ismethod
del isfunction, ismethod
### configuration ---------------------------------------------------------------
class _Configuration( object ):
__slots__ = [ 'IgnoreCommandLineOptions', 'StartGuiThread', '_gts' ]
def __init__( self ):
self.IgnoreCommandLineOptions = 0
self.StartGuiThread = 1
self._gts = []
def __setGTS( self, value ):
for c in value:
if not callable( c ):
raise ValueError( '"%s" is not callable' % str(c) );
self._gts = value
def __getGTS( self ):
return self._gts
GUIThreadScheduleOnce = property( __getGTS, __setGTS )
PyConfig = _Configuration()
del _Configuration
### choose interactive-favored policies -----------------------------------------
_root.SetMemoryPolicy( _root.kMemoryHeuristics )
_root.SetSignalPolicy( _root.kSignalSafe )
### data ________________________________________________________________________
__pseudo__all__ = [ 'gROOT', 'gSystem', 'gInterpreter',
'AddressOf', 'MakeNullPointer', 'Template', 'std' ]
__all__ = [] # purposedly empty
_orig_ehook = sys.excepthook
## for setting memory and speed policies; not exported
_memPolicyAPI = [ 'SetMemoryPolicy', 'SetOwnership', 'kMemoryHeuristics', 'kMemoryStrict' ]
_sigPolicyAPI = [ 'SetSignalPolicy', 'kSignalFast', 'kSignalSafe' ]
### helpers ---------------------------------------------------------------------
def split( str ):
npos = str.find( ' ' )
if 0 <= npos:
return str[:npos], str[npos+1:]
else:
return str, ''
### template support ------------------------------------------------------------
class Template:
def __init__( self, name ):
self.__name__ = name
def __call__( self, *args ):
newargs = [ self.__name__[ 0 <= self.__name__.find( 'std::' ) and 5 or 0:] ]
for arg in args:
if type(arg) == str:
arg = ','.join( map( lambda x: x.strip(), arg.split(',') ) )
newargs.append( arg )
result = _root.MakeRootTemplateClass( *newargs )
# special case pythonization (builtin_map is not available from the C-API)
if hasattr( result, 'push_back' ):
def iadd( self, ll ):
[ self.push_back(x) for x in ll ]
return self
result.__iadd__ = iadd
return result
_root.Template = Template
### scope place holder for STL classes ------------------------------------------
class _stdmeta( type ):
def __getattr__( cls, attr ): # for non-templated classes in std
klass = _root.MakeRootClass( attr, cls )
setattr( cls, attr, klass )
return klass
class std( object ):
__metaclass__ = _stdmeta
stlclasses = ( 'complex', 'pair', \
'deque', 'list', 'queue', 'stack', 'vector', 'map', 'multimap', 'set', 'multiset' )
for name in stlclasses:
locals()[ name ] = Template( "std::%s" % name )
_root.std = std
sys.modules['ROOT.std'] = std
### special cases for gPad, gVirtualX (are C++ macro's) -------------------------
class _ExpandMacroFunction( object ):
def __init__( self, klass, func ):
c = _root.MakeRootClass( klass )
self.func = getattr( c, func )
def __getattr__( self, what ):
return getattr( self.__dict__[ 'func' ](), what )
def __cmp__( self, other ):
return cmp( self.func(), other )
def __len__( self ):
if self.func():
return 1
return 0
def __repr__( self ):
return repr( self.func() )
def __str__( self ):
return str( self.func() )
_root.gPad = _ExpandMacroFunction( "TVirtualPad", "Pad" )
_root.gVirtualX = _ExpandMacroFunction( "TVirtualX", "Instance" )
_root.gDirectory = _ExpandMacroFunction( "TDirectory", "CurrentDirectory" )
_root.gFile = _ExpandMacroFunction( "TFile", "CurrentFile" )
_root.gInterpreter = _ExpandMacroFunction( "TInterpreter", "Instance" )
### special case pythonization --------------------------------------------------
def _TTree__iter__( self ):
i = 0
bytes_read = self.GetEntry(i)
while 0 < bytes_read:
yield self # TODO: not sure how to do this w/ C-API ...
i += 1
bytes_read = self.GetEntry(i)
if bytes_read == -1:
raise RuntimeError( "TTree I/O error" )
_root.MakeRootClass( "TTree" ).__iter__ = _TTree__iter__
### RINT command emulation ------------------------------------------------------
def _excepthook( exctype, value, traceb ):
# catch syntax errors only (they contain the full line)
if isinstance( value, SyntaxError ) and value.text:
cmd, arg = split( value.text[:-1] )
# mimic ROOT/CINT commands
if cmd == '.q':
sys.exit( 0 )
elif cmd == '.?' or cmd == '.help':
sys.stdout.write( """PyROOT emulation of CINT commands.
All emulated commands must be preceded by a . (dot).
===========================================================================
Help: ? : this help
help : this help
Shell: ![shell] : execute shell command
Evaluation: x [file] : load [file] and evaluate {statements} in the file
Load/Unload: L [lib] : load [lib]
Quit: q : quit python session
The standard python help system is available through a call to 'help()' or
'help(<id>)' where <id> is an identifier, e.g. a class or function such as
TPad or TPad.cd, etc.
""" )
return
elif cmd == '.!' and arg:
return os.system( arg )
elif cmd == '.x' and arg:
import __main__
fn = os.path.expanduser( os.path.expandvars( arg ) )
execfile( fn, __main__.__dict__, __main__.__dict__ )
return
elif cmd == '.L':
return _root.gSystem.Load( arg )
elif cmd == '.cd' and arg:
os.chdir( arg )
return
elif cmd == '.ls':
return sys.modules[ __name__ ].gDirectory.ls()
elif cmd == '.pwd':
return sys.modules[ __name__ ].gDirectory.pwd()
elif isinstance( value, SyntaxError ) and \
value.msg == "can't assign to function call":
sys.stdout.write( """Are you trying to assign a value to a reference return, for example to the
result of a call to "double& SMatrix<>::operator()(int,int)"? If so, then
please use operator[] instead, as in e.g. "mymatrix[i][j] = somevalue".
""" )
# normal exception processing
_orig_ehook( exctype, value, traceb )
if not '__IPYTHON__' in __builtins__:
# IPython has its own ways of executing shell commands etc.
sys.excepthook = _excepthook
### call EndOfLineAction after each interactive command (to update display etc.)
_orig_dhook = sys.displayhook
def _displayhook( v ):
_root.gInterpreter.EndOfLineAction()
return _orig_dhook( v )
### set import hook to be able to trigger auto-loading as appropriate
import __builtin__
_orig_ihook = __builtin__.__import__
def _importhook( name, glbls = {}, lcls = {}, fromlist = [], level = -1 ):
if name[0:5] == 'ROOT.':
try:
sys.modules[ name ] = getattr( sys.modules[ 'ROOT' ], name[5:] )
except Exception:
pass
if 5 <= sys.version_info[1]: # minor
return _orig_ihook( name, glbls, lcls, fromlist, level )
return _orig_ihook( name, glbls, lcls, fromlist )
__builtin__.__import__ = _importhook
### helper to prevent GUIs from starving
def _processRootEvents( controller ):
import time
gSystemProcessEvents = _root.gSystem.ProcessEvents
if sys.platform == 'win32':
import thread
_root.gROOT.ProcessLineSync('((TGWin32 *)gVirtualX)->SetUserThreadId(%ld)' % (thread.get_ident()))
while controller.keeppolling:
try:
gSystemProcessEvents()
if PyConfig.GUIThreadScheduleOnce:
for guicall in PyConfig.GUIThreadScheduleOnce:
guicall()
PyConfig.GUIThreadScheduleOnce = []
time.sleep( 0.01 )
except: # in case gSystem gets destroyed early on exit
pass
### allow loading ROOT classes as attributes ------------------------------------
class ModuleFacade( types.ModuleType ):
def __init__( self, module ):
types.ModuleType.__init__( self, 'ROOT' )
self.__dict__[ 'module' ] = module
self.__dict__[ '__doc__' ] = self.module.__doc__
self.__dict__[ '__name__' ] = self.module.__name__
self.__dict__[ '__file__' ] = self.module.__file__
self.__dict__[ 'keeppolling' ] = 0
self.__dict__[ 'PyConfig' ] = self.module.PyConfig
class gROOTWrapper( object ):
def __init__( self, gROOT, master ):
self.__dict__[ '_master' ] = master
self.__dict__[ '_gROOT' ] = gROOT
def __getattr__( self, name ):
if name != 'SetBatch' and self._master.__dict__[ 'gROOT' ] != self._gROOT:
self._master._ModuleFacade__finalSetup()
del self._master.__class__._ModuleFacade__finalSetup
return getattr( self._gROOT, name )
def __setattr__( self, name, value ):
return setattr( self._gROOT, name, value )
self.__dict__[ 'gROOT' ] = gROOTWrapper( _root.gROOT, self )
del gROOTWrapper
# begin with startup gettattr/setattr
self.__class__.__getattr__ = self.__class__.__getattr1
del self.__class__.__getattr1
self.__class__.__setattr__ = self.__class__.__setattr1
del self.__class__.__setattr1
def __setattr1( self, name, value ): # "start-up" setattr
# create application, thread etc.
self.__finalSetup()
del self.__class__.__finalSetup
# let "running" setattr handle setting
return setattr( self, name, value )
def __setattr2( self, name, value ): # "running" getattr
# to allow assignments to ROOT globals such as ROOT.gDebug
if not name in self.__dict__:
try:
# assignment to an existing ROOT global (establishes proxy)
setattr( self.__class__, name, _root.GetRootGlobal( name ) )
except LookupError:
# allow a few limited cases where new globals can be set
if sys.hexversion >= 0x3000000:
pylong = int
else:
pylong = long
tcnv = { bool : 'bool %s = %d;',
int : 'int %s = %d;',
pylong : 'long %s = %d;',
float : 'double %s = %f;',
str : 'string %s = "%s";' }
try:
_root.gROOT.ProcessLine( tcnv[ type(value) ] % (name,value) );
setattr( self.__class__, name, _root.GetRootGlobal( name ) )
except KeyError:
pass # can still assign normally, to the module
# actual assignment through descriptor, or normal python way
return super( self.__class__, self ).__setattr__( name, value )
def __getattr1( self, name ): # "start-up" getattr
# special case, to allow "from ROOT import gROOT" w/o sending GUI events
if name == '__path__':
raise AttributeError( name )
# create application, thread etc.
self.__finalSetup()
del self.__class__.__finalSetup
# let "running" getattr handle lookup
return getattr( self, name )
def __getattr2( self, name ): # "running" getattr
# handle "from ROOT import *" ... can be called multiple times
if name == '__all__':
if '__IPYTHON__' in __builtins__:
import warnings
warnings.warn( '"from ROOT import *" is not supported under IPython' )
# continue anyway, just in case it works ...
caller = sys.modules[ sys._getframe( 1 ).f_globals[ '__name__' ] ]
# we may be calling in from __getattr1, verify and if so, go one frame up
if caller == self:
caller = sys.modules[ sys._getframe( 2 ).f_globals[ '__name__' ] ]
# setup the pre-defined globals
for name in self.module.__pseudo__all__:
caller.__dict__[ name ] = getattr( _root, name )
# install the hook
_root.SetRootLazyLookup( caller.__dict__ )
# return empty list, to prevent further copying
return self.module.__all__
# lookup into ROOT (which may cause python-side enum/class/global creation)
attr = _root.LookupRootEntity( name )
# the call above will raise AttributeError as necessary; so if we get here,
# attr is valid: cache as appropriate, so we don't come back
if type(attr) == _root.PropertyProxy:
setattr( self.__class__, name, attr ) # descriptor
return getattr( self, name )
else:
self.__dict__[ name ] = attr # normal member
return attr
# reaching this point means failure ...
raise AttributeError( name )
def __delattr__( self, name ):
# this is for convenience, as typically lookup results are kept at two places
try:
delattr( self.module._root, name )
except AttributeError:
pass
return super( self.__class__, self ).__delattr__( name )
def __finalSetup( self ):
# prevent this method from being re-entered through the gROOT wrapper
self.__dict__[ 'gROOT' ] = _root.gROOT
# switch to running gettattr/setattr
self.__class__.__getattr__ = self.__class__.__getattr2
del self.__class__.__getattr2
self.__class__.__setattr__ = self.__class__.__setattr2
del self.__class__.__setattr2
# normally, you'll want a ROOT application; don't init any further if
# one pre-exists from some C++ code somewhere
hasargv = hasattr( sys, 'argv' )
if hasargv and PyConfig.IgnoreCommandLineOptions:
argv = sys.argv
sys.argv = []
appc = _root.MakeRootClass( 'PyROOT::TPyROOTApplication' )
if appc.CreatePyROOTApplication():
appc.InitROOTGlobals()
appc.InitCINTMessageCallback();
appc.InitROOTMessageCallback();
if hasargv and PyConfig.IgnoreCommandLineOptions:
sys.argv = argv
# now add 'string' to std so as to not confuse with module string
std.string = _root.MakeRootClass( 'string' )
# must be called after gApplication creation:
if '__IPYTHON__' in __builtins__:
# IPython's FakeModule hack otherwise prevents usage of python from CINT
_root.gROOT.ProcessLine( 'TPython::Exec( "" );' )
sys.modules[ '__main__' ].__builtins__ = __builtins__
# custom logon file (must be after creation of ROOT globals)
if hasargv and not '-n' in sys.argv:
rootlogon = os.path.expanduser( '~/.rootlogon.py' )
if os.path.exists( rootlogon ):
# could also have used execfile, but import is likely to give fewer surprises
import imp
imp.load_module( 'rootlogon', open( rootlogon, 'r' ), rootlogon, ('.py','r',1) )
del imp
else: # if the .py version of rootlogon exists, the .C is ignored (the user can
# load the .C from the .py, if so desired)
# system logon, user logon, and local logon (skip Rint.Logon)
name = '.rootlogon.C'
logons = [ os.path.join( str(self.gRootDir), 'etc', 'system' + name ),
os.path.expanduser( os.path.join( '~', name ) ) ]
if logons[-1] != os.path.join( os.getcwd(), name ):
logons.append( name )
for rootlogon in logons:
if os.path.exists( rootlogon ):
appc.ExecuteFile( rootlogon )
del rootlogon, logons
# use either the input hook or thread to send events to GUIs
if self.PyConfig.StartGuiThread and \
not ( self.keeppolling or _root.gROOT.IsBatch() ):
if self.PyConfig.StartGuiThread == 'inputhook' or\
_root.gSystem.InheritsFrom( 'TMacOSXSystem' ):
# new, PyOS_InputHook based mechanism
if PyConfig.GUIThreadScheduleOnce:
for guicall in PyConfig.GUIThreadScheduleOnce:
guicall()
PyConfig.GUIThreadScheduleOnce = []
_root.InstallGUIEventInputHook()
else:
# original, threading based approach
import threading
self.__dict__[ 'keeppolling' ] = 1
self.__dict__[ 'PyGUIThread' ] = \
threading.Thread( None, _processRootEvents, None, ( self, ) )
self.PyGUIThread.setDaemon( 1 )
self.PyGUIThread.start()
if threading.currentThread() != self.PyGUIThread:
while self.PyConfig.GUIThreadScheduleOnce:
self.PyGUIThread.join( 0.1 )
# store already available ROOT objects to prevent spurious lookups
for name in self.module.__pseudo__all__ + _memPolicyAPI + _sigPolicyAPI:
self.__dict__[ name ] = getattr( _root, name )
for name in std.stlclasses:
setattr( _root, name, getattr( std, name ) )
# set the display hook
sys.displayhook = _displayhook
sys.modules[ __name__ ] = ModuleFacade( sys.modules[ __name__ ] )
del ModuleFacade
### b/c of circular references, the facade needs explicit cleanup ---------------
import atexit
def cleanup():
# restore hooks
import sys
sys.displayhook = sys.__displayhook__
if not '__IPYTHON__' in __builtins__:
sys.excepthook = sys.__excepthook__
__builtin__.__import__ = _orig_ihook
facade = sys.modules[ __name__ ]
# reset gRootModule on the C++ side to prevent fruther lookups
_root._ResetRootModule()
# shutdown GUI thread, as appropriate (always save to call)
_root.RemoveGUIEventInputHook()
# prevent further spurious lookups into ROOT libraries
del facade.__class__.__getattr__
del facade.__class__.__setattr__
# shutdown GUI thread, as appropriate
if hasattr( facade, 'PyGUIThread' ):
facade.keeppolling = 0
# if not shutdown from GUI (often the case), wait for it
import threading
if threading.currentThread() != facade.PyGUIThread:
facade.PyGUIThread.join( 3. ) # arbitrary
del threading
# remove otherwise (potentially) circular references
import types
items = facade.module.__dict__.items()
for k, v in items:
if type(v) == types.ModuleType:
facade.module.__dict__[ k ] = None
del v, k, items, types
# destroy facade
facade.__dict__.clear()
del facade
# run part the gROOT shutdown sequence ... running it here ensures that
# it is done before any ROOT libraries are off-loaded, with unspecified
# order of static object destruction; so far it only seemed needed for
# sockets with PROOF, whereas files should not be touched this early ...
gROOT = sys.modules[ 'libPyROOT' ].gROOT
gROOT.CloseFiles()
del gROOT
# cleanup cached python strings
sys.modules[ 'libPyROOT' ]._DestroyPyStrings()
# destroy ROOT extension module and ROOT module
del sys.modules[ 'libPyROOT' ]
del sys.modules[ 'ROOT' ]
atexit.register( cleanup )
del cleanup, atexit
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