python出现错误是怎么回事？

Question

Traceback (most recent call last):
File "jqboson/core/entry.py", line 368, in _run
engine.start()
File "jqboson/core/engine.py", line 230, in start
self._dispatcher.start()
File "jqboson/core/dispatcher.py", line 223, in start
self._run_loop()
File "jqboson/core/dispatcher.py", line 190, in _run_loop
self._loop.run()
File "jqboson/core/loop/loop.py", line 73, in run
self._handle_queue()
File "jqboson/core/loop/loop.py", line 105, in _handle_queue
message.callback(**message.callback_data)
File "jqboson/core/dispatcher.py", line 103, in callback
self._event_bus.emit(evt)
File "jqboson/core/bus.py", line 47, in emit
ret.append(call(event))
File "jqboson/core/strategy.py", line 301, in _wrapper
return cb(self._context.strategy_environment.strategy_context)
File "user_code.py", line 44, in before_market_open
stock_list = list(z.sort_values(ascending=False).index)
File "pandas/core/generic.py", line 2150, in __getattr__
(type(self).__name__, name))
AttributeError: 'Series' object has no attribute 'sort_values'

Answer 1

显示>>>，是你已经进入了python交互模式，这个模式下不能用dos系统命令。
如果一定要用，输入 quit() 按回车就退出交互模式了。

Answer 2

1.语法错误可能是初学者最常遇到的,如下面熟悉的画面: SyntaxError: invalid syntax语法错误又称解析错误,又有老哥会问什么是解析错误?简单来说是基本语法结构写错了,如:多任务写成一行...
2.异常是什么? 异常和语法错误有什么区别呢? 关于异常,举个例子: 这行代码出现异常,因为Print的p应该小写: python抛出异常类型:NameError,即名字错误