create a list of length n-1 in python : I have an existing list e.g. 

months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun"]
len(months) would equal 6 in this example. 

If I were to create an empty list of the same length as months, I'd use: 

newList = [[] for i in months]

which would give me:

[[], [], [], [], [], []]

I want to create a new empty list that contains 1 item less than the original array. So that the length of the new array would be len(months) - 1