[Python] Finding if a value is found within a list in python

My code is something like

aList = ['apple', 'banana', 'cherry']
anotherList = ['orange', 'apple', 'blueberry']
adifferentList = ['strawberry', 'pear', 'peach']
aSet = [aList, anotherList, adifferentList]
for i in a set:
if i.index("apple"):
temp = i.index("apple")
del i[temp]
else:
pass


I was hoping that if a list doesn't contain "apple" it will just pass but it is currently erroring with that the list does not contain that value. Be gentle, I've taken a quarter of coding.

Edit: Error is as follows

ValueError: 'apple' is not in list
​

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