I am trying to follow along in the Python Crash Course book and create the Alien Invasion game. I’ve gotten pretty far in the development but I am currently stuck on this Attribute Error: ‘Alien’ object has no attribute ‘check edges’ error, after getting the aliens to move to the right. (For reference, this is roughly page 278 of the 7th edition book) Here is the error message. I’m a bit confused as the check edges attribute is in the Alien object, but I am too new to understand where my wires are getting crossed. Any help would be appreciated. Thanks!
[error](https://i.sstatic.net/2yT1C8M6.jpg)
[alien_invasion.py](https://i.sstatic.net/9gey0UKN.jpg)
[alien.py](https://i.sstatic.net/gBkjTAIz.jpg)
[game_functions_part_1.py](https://i.sstatic.net/IYbL1A4W.jpg)
[game_functions_part_2.py](https://i.sstatic.net/cdsCBDgY.jpg)
[game_functions_part_3.py](https://i.sstatic.net/zOZ18zX5.jpg)
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