Web Reference: Discover how to fix the common `AttributeError: 'DataFrame' object has no attribute '_data'` when loading pickle files in Python, including tips on environment setup and library versions. So of course the Manager class will actually be Settings.Manager. But the pkl file doesn't know this, and looks for the Manager class within __main__, and throws an AttributeError because it doesn't exist (Settings.Manager does, but __main__.Manager doesn't). Here's a minimal code set to demonstrate. The class_def.py module: May 26, 2023 · In conclusion, AttributeError is a common error that occurs when an object does not have a specific attribute. By understanding the common causes of AttributeError and following the steps to fix it, we can write better Python code and avoid this error in the future.
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