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In what situations can knowing the index of an item in a list be useful? Why might a programmer want to define his or her own functions? What are some potential disadvantages? How might new functions make debugging more complicated?
What are some situations in which you would use the len function to find the length of a list?
What is an example of a situation in which you might use the append method? In what ways is the append method limited?
What is the difference between a method and a function? In what ways are they similar? Why do you think Python makes a distinction between methods and functions?

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