Showing content from http://svn.python.org/projects/python/tags/release101/Lib/cmd.py below:
# A generic class to build line-oriented command interpreters import string import sys import linecache PROMPT = '(Cmd) ' IDENTCHARS = string.letters + string.digits + '_' class Cmd: def __init__(self): self.prompt = PROMPT self.identchars = IDENTCHARS self.lastcmd = '' def cmdloop(self): stop = None while not stop: try: line = raw_input(self.prompt) except EOFError: line = 'EOF' stop = self.onecmd(line) def onecmd(self, line): line = string.strip(line) if not line: line = self.lastcmd else: self.lastcmd = line i, n = 0, len(line) while i < n and line[i] in self.identchars: i = i+1 cmd, arg = line[:i], string.strip(line[i:]) if cmd == '': return self.default(line) else: try: func = getattr(self, 'do_' + cmd) except AttributeError: return self.default(line) return func(arg) def default(self, line): print '*** Unknown syntax:', line def do_help(self, arg): if arg: # XXX check arg syntax try: func = getattr(self, 'help_' + arg) except: print '*** No help on', `arg` return func() else: import newdir names = newdir.dir(self.__class__) cmds = [] for name in names: if name[:3] == 'do_': cmds.append(name[3:]) print cmds
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