The above exception was the direct cause of the following exception: Traceback (most recent call last): File "D:\hw_stock_2022\program\ETF实盘选股策略\1_ETF数据整理.py", line 131, in <module> df_list = pool.map(cal_all_etf_data, sorted(etf_list)) File "C:\Python38\lib\multiprocessing\pool.py", line 364, in map return self._map_async(func, iterable, mapstar, chunksize).get() File "C:\Python38\lib\multiprocessing\pool.py", line 771, in get raise self._value TypeError: can only concatenate list (not "str") to list
时间: 2023-02-06 10:59:22 浏览: 877
这个错误提示指出在文件 "D:\hw_stock_2022\program\ETF实盘选股策略\1_ETF数据整理.py" 的第 131 行发生了一个错误,错误类型为 "TypeError",错误信息是 "can only concatenate list (not 'str') to list"。这意味着你在尝试将一个字符串连接到一个列表中,而不是另一个列表。你需要检查你的代码,找出哪里出了问题,并改正错误。
相关问题
AttributeError: 'int' object has no attribute 'sqrt' The above exception was the direct cause of the following exception: Traceback (most recent call last):
这个错误通常意味着你尝试对一个整数对象使用sqrt函数,但是sqrt函数只能用于浮点数。你需要将整数对象转换为浮点数对象,例如:
```python
import math
x = 25
y = math.sqrt(float(x))
print(y)
```
这将输出 `5.0`,其中我们使用float函数将x转换为浮点数对象。
During handling of the above exception, another exception occurred: Traceback (most recent call last):
这段引用是一段Python代码的错误信息,它在处理一个异常的过程中遇到了另一个异常。这种情况通常发生在try-except-finally语句块中,当一个异常被捕获并处理后,可能会引发另一个异常。在这个例子中,首先发生了一个ZeroDivisionError异常,然后进入了except分支,并在except分支中又遇到了一个raise语句,引发了一个ValueError异常。接着,finally分支被执行,但在finally分支中又遇到了另一个raise语句,导致又引发了一个ValueError异常。因此,在处理第一个异常的过程中,发生了第二个异常。这些异常的详细信息被记录在Traceback中。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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