code: def enable_tracing(self, thread_trace_func=None):
          '''
          Enables tracing.
  
          If in regular mode (tracing), will set the tracing function to the tracing
          function for this thread -- by default it's `PyDB.trace_dispatch`, but after
          `PyDB.enable_tracing` is called with a `thread_trace_func`, the given function will
          be the default for the given thread.
          '''
          if self.frame_eval_func is not None:
              self.frame_eval_func()
              pydevd_tracing.SetTrace(self.dummy_trace_dispatch)
              return
  
          if thread_trace_func is None:
              thread_trace_func = self.get_thread_local_trace_func()
          else:
              self._local_thread_trace_func.thread_trace_func = thread_trace_func
  
          pydevd_tracing.SetTrace(thread_trace_funcf enable_tracing(self, thread_trace_func=None):
          '''
          Enables tracing.
  
          If in regular mode (tracing), will set the tracing function to the tracing
          function for this thread -- by default it's `PyDB.trace_dispatch`, but after
          `PyDB.enable_tracing` is called with a `thread_trace_func`, the given function will
          be the default for the given thread.
          '''
          if self.frame_eval_func is not None:
              self.frame_eval_func()
              pydevd_tracing.SetTrace(self.dummy_trace_dispatch)
              return
  
          if thread_trace_func is None:
              thread_trace_func = self.get_thread_local_trace_func()
          else:
              self._local_thread_trace_func.thread_trace_func = thread_trace_func
  
          pydevd_tracing.SetTrace(thread_trace_func)
docs: Enables tracing.
  
          If in regular mode (tracing), will set the tracing function to the tracing
          function for this thread -- by default it's `PyDB.trace_dispatch`, but after
          `PyDB.enable_tracing` is called with a `thread_trace_func`, the given function will
          be the default for the given thread.