backtrace, bt: 打印当前执行帧的回溯。list(5): 列出脚本源码的 5 行上下文（前后各 5 行）。watch(expr): 将表达式添加到监视列表。unwatch(expr): 从监视列表中移除表达式。watchers: 列出所有的监视器和它们的值（在每个断点上自动地列出）。repl: 打开调试器的 repl，用于调试脚本的上下文中的执行。exec expr: 在调试脚本的上下文中执行一个表达式。
backtrace, bt: Print backtrace of current execution framelist(5): List scripts source code with 5 line context (5 lines before and
after)watch(expr): Add expression to watch listunwatch(expr): Remove expression from watch listwatchers: List all watchers and their values (automatically listed on each
breakpoint)repl: Open debugger's repl for evaluation in debugging script's contextexec expr: Execute an expression in debugging script's context