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d14a1e28 1"""Interpreter executes Python commands."""
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3__author__ = "Patrick K. O'Brien <pobrien@orbtech.com>"
4__cvsid__ = "$Id$"
5__revision__ = "$Revision$"[11:-2]
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7import os
8import sys
9from code import InteractiveInterpreter
10import dispatcher
11import introspect
12
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13
14class 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
108class 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