code: def stalk_at(self, pid, address, action = None):
          
          bp = self.__set_break(pid, address, action, oneshot = True)
          return bp is not None
docs: Sets a one shot code breakpoint at the given process and address.
  
          If instead of an address you pass a label, the breakpoint may be
          deferred until the DLL it points to is loaded.
  
          @see: L{break_at}, L{dont_stalk_at}
  
          @type  pid: int
          @param pid: Process global ID.
  
          @type  address: int or str
          @param address:
              Memory address of code instruction to break at. It can be an
              integer value for the actual address or a string with a label
              to be resolved.
  
          @type  action: function
          @param action: (Optional) Action callback function.
  
              See L{define_code_breakpoint} for more details.
  
          @rtype:  bool
          @return: C{True} if the breakpoint was set immediately, or C{False} if
              it was deferred.