Hi, in my code you can see that I have written AAPL many times. I wanted to know if there was a piece of code or something I can write at the very beginning that would allow me to switch from AAPL to AMZN just by typing it once in the code. For example something like:

for equity in self.Equities and setting self.Equities = [AAPL] and being able to switch AAPL only in that one instance, and not having to change the symbol all throughout the code and typing AMZN 15 times.

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