wxPython/wx/py/interpreter.py

   1 """Interpreter executes Python commands."""
   2
   3 __author__ = "Patrick K. O'Brien <pobrien@orbtech.com>"
   4 __cvsid__ = "$Id$"
   5 __revision__ = "$Revision$"[11:-2]
   6
   7 import os
   8 import sys
   9 from code import InteractiveInterpreter
  10 import dispatcher
  11 import introspect
  12
  13
  14 class Interpreter(InteractiveInterpreter):
  15     """Interpreter based on code.InteractiveInterpreter."""
  16
  17     revision = __revision__
  18
  19     def __init__(self, locals=None, rawin=None,
  20                  stdin=sys.stdin, stdout=sys.stdout, stderr=sys.stderr):
  21         """Create an interactive interpreter object."""
  22         InteractiveInterpreter.__init__(self, locals=locals)
  23         self.stdin = stdin
  24         self.stdout = stdout
  25         self.stderr = stderr
  26         if rawin:
  27             import __builtin__
  28             __builtin__.raw_input = rawin
  29             del __builtin__
  30         copyright = 'Type "help", "copyright", "credits" or "license"'
  31         copyright += ' for more information.'
  32         self.introText = 'Python %s on %s%s%s' % \
  33                          (sys.version, sys.platform, os.linesep, copyright)
  34         try:
  35             sys.ps1
  36         except AttributeError:
  37             sys.ps1 = '>>> '
  38         try:
  39             sys.ps2
  40         except AttributeError:
  41             sys.ps2 = '... '
  42         self.more = 0
  43         # List of lists to support recursive push().
  44         self.commandBuffer = []
  45         self.startupScript = os.environ.get('PYTHONSTARTUP')
  46
  47     def push(self, command):
  48         """Send command to the interpreter to be executed.
  49
  50         Because this may be called recursively, we append a new list
  51         onto the commandBuffer list and then append commands into
  52         that.  If the passed in command is part of a multi-line
  53         command we keep appending the pieces to the last list in
  54         commandBuffer until we have a complete command. If not, we
  55         delete that last list."""
  56         command = str(command)  # In case the command is unicode.
  57         if not self.more:
  58             try: del self.commandBuffer[-1]
  59             except IndexError: pass
  60         if not self.more: self.commandBuffer.append([])
  61         self.commandBuffer[-1].append(command)
  62         source = '\n'.join(self.commandBuffer[-1])
  63         more = self.more = self.runsource(source)
  64         dispatcher.send(signal='Interpreter.push', sender=self,
  65                         command=command, more=more, source=source)
  66         return more
  67
  68     def runsource(self, source):
  69         """Compile and run source code in the interpreter."""
  70         stdin, stdout, stderr = sys.stdin, sys.stdout, sys.stderr
  71         sys.stdin, sys.stdout, sys.stderr = \
  72                    self.stdin, self.stdout, self.stderr
  73         more = InteractiveInterpreter.runsource(self, source)
  74         # If sys.std* is still what we set it to, then restore it.
  75         # But, if the executed source changed sys.std*, assume it was
  76         # meant to be changed and leave it. Power to the people.
  77         if sys.stdin == self.stdin:
  78             sys.stdin = stdin
  79         if sys.stdout == self.stdout:
  80             sys.stdout = stdout
  81         if sys.stderr == self.stderr:
  82             sys.stderr = stderr
  83         return more
  84
  85     def getAutoCompleteKeys(self):
  86         """Return list of auto-completion keycodes."""
  87         return [ord('.')]
  88
  89     def getAutoCompleteList(self, command='', *args, **kwds):
  90         """Return list of auto-completion options for a command.
  91
  92         The list of options will be based on the locals namespace."""
  93         stdin, stdout, stderr = sys.stdin, sys.stdout, sys.stderr
  94         sys.stdin, sys.stdout, sys.stderr = \
  95                    self.stdin, self.stdout, self.stderr
  96         l = introspect.getAutoCompleteList(command, self.locals,
  97                                            *args, **kwds)
  98         sys.stdin, sys.stdout, sys.stderr = stdin, stdout, stderr
  99         return l
 100
 101     def getCallTip(self, command='', *args, **kwds):
 102         """Return call tip text for a command.
 103
 104         Call tip information will be based on the locals namespace."""
 105         return introspect.getCallTip(command, self.locals, *args, **kwds)
 106
 107
 108 class InterpreterAlaCarte(Interpreter):
 109     """Demo Interpreter."""
 110
 111     def __init__(self, locals, rawin, stdin, stdout, stderr,
 112                  ps1='main prompt', ps2='continuation prompt'):
 113         """Create an interactive interpreter object."""
 114         Interpreter.__init__(self, locals=locals, rawin=rawin,
 115                              stdin=stdin, stdout=stdout, stderr=stderr)
 116         sys.ps1 = ps1
 117         sys.ps2 = ps2
 118
 119