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Chris Leonard3,018 Points
Why do you hardcode shopping_list into the for loop in your show_list function? Shouldn't it be taken as a parameter?
I ended up using:
print("Your current shopping list: ")
for item in list:
print("* " + item)
In this small application example, it may not be necessary, but isn't it logical to reinforce that point now, so that when someone gets to the point where code reuse and extensibility matters, they're already in the habit? (An example for this is what if you get another user story, and they want a grocery store list and a hardware store list?)
Steven Parker228,991 Points
The example project was probably made specific to keep the focus on the particular techniques being taught. But from the concepts of "best practice" in the program overall, you have a very good idea!
Don't forget to also change the other functions (such as "add_list") if you want to generalize the entire program.