wxPython/wxPython/lib/PyCrust/interpreter.py

   1 """PyCrust Interpreter executes Python commands."""
   2
   3 __author__ = "Patrick K. O'Brien <pobrien@orbtech.com>"
   4 __cvsid__ = "$Id$"
   5 __date__ = "July 1, 2001"
   6 __version__ = "$Revision$"[11:-2]
   7
   8 import os
   9 import sys
  10 from code import InteractiveInterpreter
  11 import introspect
  12
  13
  14 class Interpreter(InteractiveInterpreter):
  15     """PyCrust Interpreter based on code.InteractiveInterpreter."""
  16
  17     revision = __version__
  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 = \
  31             'Type "copyright", "credits" or "license" 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 that.
  52         If the passed in command is part of a multi-line command we keep
  53         appending the pieces to the last list in commandBuffer until we
  54         have a complete command. If not, we delete that last list."""
  55         if not self.more:
  56             try: del self.commandBuffer[-1]
  57             except IndexError: pass
  58         if not self.more: self.commandBuffer.append([])
  59         self.commandBuffer[-1].append(command)
  60         source = '\n'.join(self.commandBuffer[-1])
  61         self.more = self.runsource(source)
  62         return self.more
  63
  64     def runsource(self, source):
  65         """Compile and run source code in the interpreter."""
  66         stdin, stdout, stderr = sys.stdin, sys.stdout, sys.stderr
  67         sys.stdin = self.stdin
  68         sys.stdout = self.stdout
  69         sys.stderr = self.stderr
  70         more = InteractiveInterpreter.runsource(self, source)
  71         # If sys.std* is still what we set it to, then restore it.
  72         # But, if the executed source changed sys.std*, assume it
  73         # was meant to be changed and leave it. Power to the people.
  74         if sys.stdin == self.stdin:
  75             sys.stdin = stdin
  76         if sys.stdout == self.stdout:
  77             sys.stdout = stdout
  78         if sys.stderr == self.stderr:
  79             sys.stderr = stderr
  80         return more
  81
  82     def getAutoCompleteList(self, command='', *args, **kwds):
  83         """Return list of auto-completion options for a command.
  84
  85         The list of options will be based on the locals namespace."""
  86         return introspect.getAutoCompleteList(command, self.locals, *args, **kwds)
  87
  88     def getCallTip(self, command='', *args, **kwds):
  89         """Return call tip text for a command.
  90
  91         The call tip information will be based on the locals namespace."""
  92         return introspect.getCallTip(command, self.locals, *args, **kwds)
  93
  94
  95 class InterpreterAlaCarte(Interpreter):
  96     """PyCrustAlaCarte Demo Interpreter."""
  97
  98     def __init__(self, locals, rawin, stdin, stdout, stderr, \
  99                  ps1='main prompt', ps2='continuation prompt'):
 100         """Create an interactive interpreter object."""
 101         Interpreter.__init__(self, locals=locals, rawin=rawin, \
 102                              stdin=stdin, stdout=stdout, stderr=stderr)
 103         sys.ps1 = ps1
 104         sys.ps2 = ps2
 105
 106