keyerror(key) from err

这是一个Python的错误提示，意思是在程序中使用了一个不存在的键值（key），导致程序出错。通常情况下，这种错误是由于字典或者其他映射类型中不存在该键值所引起的。要解决这个问题，需要检查程序中使用的键值是否正确，或者在使用字典等映射类型时，先判断该键值是否存在。

相关问题

raise KeyError(key) from err KeyError: 113

I'm sorry, as an AI language model, I can only interpret this as a Python error message.

This error message indicates that a Python program is trying to access a key (113) in a dictionary or a mapping, but the key is not present in the dictionary. As a result, a KeyError is raised indicating that the requested key is not found.

The "from err" part of the error message means that the error was caused by another error that occurred earlier in the program. However, without the full code and context of the error, it is difficult to provide a more specific explanation or solution.

raise KeyError(key) from err KeyError: 0

这个错误通常是指在尝试访问字典中不存在的键时引发的。例如，如果你尝试使用字典中不存在的键访问一个值，就会引发此错误。解决此问题的方法是确保你正在访问字典中真正存在的键。你可以使用`in`关键字来检查特定的键是否存在于字典中，或者使用`try-except`语句来处理可能出现的`KeyError`异常。例如：

my_dict = {'a': 1, 'b': 2, 'c': 3}

# 使用in关键字检查键是否存在
if 'd' in my_dict:
    print(my_dict['d'])
else:
    print('Key not found')

# 使用try-except处理KeyError异常
try:
    print(my_dict['d'])
except KeyError:
    print('Key not found')