| # A generic class to build line-oriented command interpreters |
| |
| import string |
| import sys |
| import linecache |
| |
| PROMPT='(Cmd) ' |
| IDENTCHARS= string.letters+ string.digits+'_' |
| |
| classCmd: |
| |
| def __init__(self): |
| self.prompt= PROMPT |
| self.identchars= IDENTCHARS |
| self.lastcmd='' |
| |
| def cmdloop(self): |
| stop=None |
| whilenot stop: |
| try: |
| line= raw_input(self.prompt) |
| exceptEOFError: |
| line='EOF' |
| stop= self.onecmd(line) |
| |
| def onecmd(self, line): |
| line= string.strip(line) |
| ifnot line: |
| line= self.lastcmd |
| else: |
| self.lastcmd= line |
| i, n=0, len(line) |
| while i< nand 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) |
| exceptAttributeError: |
| 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 namein names: |
| if name[:3]=='do_': |
| cmds.append(name[3:]) |
| print cmds |
