Raise keyerror(f”none of [{key}] are in the [{axis_name}]”)

    
      raise keyerror(f"none of [{key}] are in the [{axis_name}]")
    
  

This is a piece of code that raises a KeyError exception with a custom error message.

The error message is formatted using f-string syntax, which allows us to insert variable values into a string by placing them within curly braces. In this case, the key and axis_name variables are being inserted into the string.

For example, if key is “column” and axis_name is “dataframe”, the error message will be:

    
      none of [column] are in the [dataframe]
    
  

This error is typically encountered when trying to access a key that does not exist in a dictionary or a column that is not present in a dataframe. It serves as a helpful indication that the specified key or column name is not valid in the given context.

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