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 try:
  14     True
  15 except NameError:
  16     True = 1==1
  17     False = 1==0
  18
  19
  20 class Interpreter(InteractiveInterpreter):
  21     """Interpreter based on code.InteractiveInterpreter."""
  22
  23     revision = __revision__
  24
  25     def __init__(self, locals=None, rawin=None,
  26                  stdin=sys.stdin, stdout=sys.stdout, stderr=sys.stderr):
  27         """Create an interactive interpreter object."""
  28         InteractiveInterpreter.__init__(self, locals=locals)
  29         self.stdin = stdin
  30         self.stdout = stdout
  31         self.stderr = stderr
  32         if rawin:
  33             import __builtin__
  34             __builtin__.raw_input = rawin
  35             del __builtin__
  36         copyright = 'Type "help", "copyright", "credits" or "license"'
  37         copyright += ' for more information.'
  38         self.introText = 'Python %s on %s%s%s' % \
  39                          (sys.version, sys.platform, os.linesep, copyright)
  40         try:
  41             sys.ps1
  42         except AttributeError:
  43             sys.ps1 = '>>> '
  44         try:
  45             sys.ps2
  46         except AttributeError:
  47             sys.ps2 = '... '
  48         self.more = 0
  49         # List of lists to support recursive push().
  50         self.commandBuffer = []
  51         self.startupScript = os.environ.get('PYTHONSTARTUP')
  52
  53     def push(self, command):
  54         """Send command to the interpreter to be executed.
  55
  56         Because this may be called recursively, we append a new list
  57         onto the commandBuffer list and then append commands into
  58         that.  If the passed in command is part of a multi-line
  59         command we keep appending the pieces to the last list in
  60         commandBuffer until we have a complete command. If not, we
  61         delete that last list."""
  62         command = str(command)  # In case the command is unicode.
  63         if not self.more:
  64             try: del self.commandBuffer[-1]
  65             except IndexError: pass
  66         if not self.more: self.commandBuffer.append([])
  67         self.commandBuffer[-1].append(command)
  68         source = '\n'.join(self.commandBuffer[-1])
  69         more = self.more = self.runsource(source)
  70         dispatcher.send(signal='Interpreter.push', sender=self,
  71                         command=command, more=more, source=source)
  72         return more
  73
  74     def runsource(self, source):
  75         """Compile and run source code in the interpreter."""
  76         stdin, stdout, stderr = sys.stdin, sys.stdout, sys.stderr
  77         sys.stdin, sys.stdout, sys.stderr = \
  78                    self.stdin, self.stdout, self.stderr
  79         more = InteractiveInterpreter.runsource(self, source)
  80         # If sys.std* is still what we set it to, then restore it.
  81         # But, if the executed source changed sys.std*, assume it was
  82         # meant to be changed and leave it. Power to the people.
  83         if sys.stdin == self.stdin:
  84             sys.stdin = stdin
  85         if sys.stdout == self.stdout:
  86             sys.stdout = stdout
  87         if sys.stderr == self.stderr:
  88             sys.stderr = stderr
  89         return more
  90
  91     def getAutoCompleteKeys(self):
  92         """Return list of auto-completion keycodes."""
  93         return [ord('.')]
  94
  95     def getAutoCompleteList(self, command='', *args, **kwds):
  96         """Return list of auto-completion options for a command.
  97
  98         The list of options will be based on the locals namespace."""
  99         stdin, stdout, stderr = sys.stdin, sys.stdout, sys.stderr
 100         sys.stdin, sys.stdout, sys.stderr = \
 101                    self.stdin, self.stdout, self.stderr
 102         l = introspect.getAutoCompleteList(command, self.locals,
 103                                            *args, **kwds)
 104         sys.stdin, sys.stdout, sys.stderr = stdin, stdout, stderr
 105         return l
 106
 107     def getCallTip(self, command='', *args, **kwds):
 108         """Return call tip text for a command.
 109
 110         Call tip information will be based on the locals namespace."""
 111         return introspect.getCallTip(command, self.locals, *args, **kwds)
 112
 113
 114 class InterpreterAlaCarte(Interpreter):
 115     """Demo Interpreter."""
 116
 117     def __init__(self, locals, rawin, stdin, stdout, stderr,
 118                  ps1='main prompt', ps2='continuation prompt'):
 119         """Create an interactive interpreter object."""
 120         Interpreter.__init__(self, locals=locals, rawin=rawin,
 121                              stdin=stdin, stdout=stdout, stderr=stderr)
 122         sys.ps1 = ps1
 123         sys.ps2 = ps2
 124
 125