pdb.py

mallet是自然语言处理、机器学习领域的一个开源项目。

             (line[:3] == '"""') or line[:3] == "'''" ):
            print '*** Blank or comment'
            return 0
        # When a file is read in and a breakpoint is at
        # the 'def' statement, the system stops there at
        # code parse time.  We don't want that, so all breakpoints
        # set at 'def' statements are moved one line onward
        if line[:3] == 'def':
            instr = ''
            brackets = 0
            while 1:
                skipone = 0
                for c in line:
                    if instr:
                        if skipone:
                            skipone = 0
                        elif c == '\\':
                            skipone = 1
                        elif c == instr:
                            instr = ''
                    elif c == '#':
                        break
                    elif c in ('"',"'"):
                        instr = c
                    elif c in ('(','{','['):
                        brackets = brackets + 1
                    elif c in (')','}',']'):
                        brackets = brackets - 1
                lineno = lineno+1
                line = linecache.getline(filename, lineno)
                if not line:
                    print 'end of file'
                    return 0
                line = line.strip()
                if not line: continue   # Blank line
                if brackets <= 0 and line[0] not in ('#','"',"'"):
                    break
        return lineno

    def do_enable(self, arg):
        args = arg.split()
        for i in args:
            try:
                i = int(i)
            except ValueError:
                print 'Breakpoint index %r is not a number' % i
                continue

            if not (0 <= i < len(bdb.Breakpoint.bpbynumber)):
                print 'No breakpoint numbered', i
                continue

            bp = bdb.Breakpoint.bpbynumber[i]
            if bp:
                bp.enable()

    def do_disable(self, arg):
        args = arg.split()
        for i in args:
            try:
                i = int(i)
            except ValueError:
                print 'Breakpoint index %r is not a number' % i
                continue
            
            if not (0 <= i < len(bdb.Breakpoint.bpbynumber)):
                print 'No breakpoint numbered', i
                continue

            bp = bdb.Breakpoint.bpbynumber[i]
            if bp:
                bp.disable()

    def do_condition(self, arg):
        # arg is breakpoint number and condition
        args = arg.split(' ', 1)
        bpnum = int(args[0].strip())
        try:
            cond = args[1]
        except:
            cond = None
        bp = bdb.Breakpoint.bpbynumber[bpnum]
        if bp:
            bp.cond = cond
            if not cond:
                print 'Breakpoint', bpnum,
                print 'is now unconditional.'

    def do_ignore(self,arg):
        """arg is bp number followed by ignore count."""
        args = arg.split()
        bpnum = int(args[0].strip())
        try:
            count = int(args[1].strip())
        except:
            count = 0
        bp = bdb.Breakpoint.bpbynumber[bpnum]
        if bp:
            bp.ignore = count
            if (count > 0):
                reply = 'Will ignore next '
                if (count > 1):
                    reply = reply + '%d crossings' % count
                else:
                    reply = reply + '1 crossing'
                print reply + ' of breakpoint %d.' % bpnum
            else:
                print 'Will stop next time breakpoint',
                print bpnum, 'is reached.'

    def do_clear(self, arg):
        """Three possibilities, tried in this order:
        clear -> clear all breaks, ask for confirmation
        clear file:lineno -> clear all breaks at file:lineno
        clear bpno bpno ... -> clear breakpoints by number"""
        if not arg:
            try:
                reply = raw_input('Clear all breaks? ')
            except EOFError:
                reply = 'no'
            reply = reply.strip().lower()
            if reply in ('y', 'yes'):
                self.clear_all_breaks()
            return
        if ':' in arg:
            # Make sure it works for "clear C:\foo\bar.py:12"
            i = arg.rfind(':')
            filename = arg[:i]
            arg = arg[i+1:]
            try:
                lineno = int(arg)
            except:
                err = "Invalid line number (%s)" % arg
            else:
                err = self.clear_break(filename, lineno)
            if err: print '***', err
            return
        numberlist = arg.split()
        for i in numberlist:
            err = self.clear_bpbynumber(i)
            if err:
                print '***', err
            else:
                print 'Deleted breakpoint %s ' % (i,)
    do_cl = do_clear # 'c' is already an abbreviation for 'continue'

    def do_where(self, arg):
        self.print_stack_trace()
    do_w = do_where
    do_bt = do_where

    def do_up(self, arg):
        if self.curindex == 0:
            print '*** Oldest frame'
        else:
            self.curindex = self.curindex - 1
            self.curframe = self.stack[self.curindex][0]
            self.print_stack_entry(self.stack[self.curindex])
            self.lineno = None
    do_u = do_up

    def do_down(self, arg):
        if self.curindex + 1 == len(self.stack):
            print '*** Newest frame'
        else:
            self.curindex = self.curindex + 1
            self.curframe = self.stack[self.curindex][0]
            self.print_stack_entry(self.stack[self.curindex])
            self.lineno = None
    do_d = do_down

    def do_step(self, arg):
        self.set_step()
        return 1
    do_s = do_step

    def do_next(self, arg):
        self.set_next(self.curframe)
        return 1
    do_n = do_next

    def do_return(self, arg):
        self.set_return(self.curframe)
        return 1
    do_r = do_return

    def do_continue(self, arg):
        self.set_continue()
        return 1
    do_c = do_cont = do_continue

    def do_quit(self, arg):
        self.set_quit()
        return 1
    do_q = do_quit
    do_exit = do_quit

    def do_EOF(self, arg):
        print
        self.set_quit()
        return 1

    def do_args(self, arg):
        f = self.curframe
        co = f.f_code
        dict = f.f_locals
        n = co.co_argcount
        if co.co_flags & 4: n = n+1
        if co.co_flags & 8: n = n+1
        for i in range(n):
            name = co.co_varnames[i]
            print name, '=',
            if dict.has_key(name): print dict[name]
            else: print "*** undefined ***"
    do_a = do_args

    def do_retval(self, arg):
        if self.curframe.f_locals.has_key('__return__'):
            print self.curframe.f_locals['__return__']
        else:
            print '*** Not yet returned!'
    do_rv = do_retval

    def do_p(self, arg):
        try:
            value = eval(arg, self.curframe.f_globals,
                            self.curframe.f_locals)
        except:
            t, v = sys.exc_info()[:2]
            if type(t) == type(''):
                exc_type_name = t
            else: exc_type_name = t.__name__
            print '***', exc_type_name + ':', `v`
            return

        print `value`

    def do_list(self, arg):
        self.lastcmd = 'list'
        last = None
        if arg:
            try:
                x = eval(arg, {}, {})
                if type(x) == type(()):
                    first, last = x
                    first = int(first)
                    last = int(last)
                    if last < first:
                        # Assume it's a count
                        last = first + last
                else:
                    first = max(1, int(x) - 5)
            except:
                print '*** Error in argument:', `arg`
                return
        elif self.lineno is None:
            first = max(1, self.curframe.f_lineno - 5)
        else:
            first = self.lineno + 1
        if last is None:
            last = first + 10
        filename = self.curframe.f_code.co_filename
        breaklist = self.get_file_breaks(filename)
        try:
            for lineno in range(first, last+1):
                line = linecache.getline(filename, lineno)
                if not line:
                    print '[EOF]'
                    break
                else:
                    s = `lineno`.rjust(3)
                    if len(s) < 4: s = s + ' '
                    if lineno in breaklist: s = s + 'B'
                    else: s = s + ' '
                    if lineno == self.curframe.f_lineno:
                        s = s + '->'
                    print s + '\t' + line,
                    self.lineno = lineno
        except KeyboardInterrupt:
            pass
    do_l = do_list

    def do_whatis(self, arg):
        try:
            value = eval(arg, self.curframe.f_globals,
                            self.curframe.f_locals)
        except:
            t, v = sys.exc_info()[:2]
            if type(t) == type(''):
                exc_type_name = t
            else: exc_type_name = t.__name__
            print '***', exc_type_name + ':', `v`
            return
        code = None
        # Is it a function?
        try: code = value.func_code
        except: pass
        if code:
            print 'Function', code.co_name
            return
        # Is it an instance method?
        try: code = value.im_func.func_code
        except: pass
        if code:
            print 'Method', code.co_name
            return
        # None of the above...
        print type(value)

    def do_alias(self, arg):
        args = arg.split()
        if len(args) == 0:
            keys = self.aliases.keys()
            keys.sort()
            for alias in keys:
                print "%s = %s" % (alias, self.aliases[alias])
            return
        if self.aliases.has_key(args[0]) and len (args) == 1:
            print "%s = %s" % (args[0], self.aliases[args[0]])
        else:
            self.aliases[args[0]] = ' '.join(args[1:])

    def do_unalias(self, arg):
        args = arg.split()
        if len(args) == 0: return
        if self.aliases.has_key(args[0]):
            del self.aliases[args[0]]