python.Interactive.ShellEscapes Class Reference

LazyPython based hook for shell commands ====================================. More...

Collaboration diagram for python.Interactive.ShellEscapes:

Public Member Functions
def	__init__ (self)
def	uninstall (self)
def	__call__ (self, exctype, value, traceb)

Private Attributes
	_orig_ehook

Detailed Description

LazyPython based hook for shell commands ====================================.

Provide shell escapes from the prompt by catching name and syntax errors.

Definition at line 18 of file Interactive.py.

Constructor & Destructor Documentation

__init__()

def python.Interactive.ShellEscapes.__init__

(

self

)

Definition at line 21 of file Interactive.py.

   def __init__( self ):
      self._orig_ehook = sys.excepthook
      log.debug( 'shell short-cuts enabled' )
 

Member Function Documentation

__call__()

def python.Interactive.ShellEscapes.__call__	(		self,
			exctype,
			value,
			traceb
	)

Definition at line 29 of file Interactive.py.

   def __call__( self, exctype, value, traceb ):
      global _shellCommands
 
      cmd = None
 
    # catch name and syntax errors to perform shell escapes if known
      if isinstance( value, NameError ):
         res = _NAMEREX.search( str(value) )
         if res:
            cmd = res.group( _NAME )
 
          # disallow selected commands/executables
            if cmd in _unacceptable:
               cmd = None
 
      elif isinstance( value, SyntaxError ):
         cmd = value.text[:-1]
 
    # execute command, if any
      if cmd is not None:
         args = cmd.split()
         exe = args[0]
 
       # special cases
         if exe == 'cd' and len(args) == 2:
            os.chdir( args[1] )
            log.info( 'new directory: %s', os.getcwd() )
            return
 
         if exe == 'help' and len(args) == 2:
            import __main__
            exec ('help( %s )' % args[1] in __main__.__dict__, __main__.__dict__)
            return
 
       # cache shell command
         if exe not in _shellCommands:
            log.debug( 'accepting executable "%s"', exe )
            if unixtools.which( exe ):
               _shellCommands.append( exe )
            else:
               exe = None
 
         if exe is not None:
            log.debug( 'executing shell command "%s"', cmd )
            os.system( cmd )
            return
 
    # nothing recognizable: normal exception processing
      self._orig_ehook( exctype, value, traceb )
 
 

uninstall()

def python.Interactive.ShellEscapes.uninstall

(

self

)

Definition at line 25 of file Interactive.py.

   def uninstall( self ):
      sys.excepthook = self._orig_ehook
      log.debug( 'shell short-cuts disabled' )
 

Member Data Documentation

_orig_ehook

python.Interactive.ShellEscapes._orig_ehook

private

Definition at line 22 of file Interactive.py.

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The documentation for this class was generated from the following file:

• Interactive.py