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List
Python Lists
| Term | Definition |
|---|---|
| list definition | a sequence of objects. The objects can be of any type: numbers, strings, even other lists. |
| list format | pets = [‘goldfish’, ‘cat’, ‘dog’] |
| True if object x is in list lst, false otherwise | x in lst |
| False if object x is in list lst, true otherwise | x not in lst |
| Concatenation of lists lstA and lstB | lstA + lstB |
| Concatenation of n copies of list lst | lst * n, n * lst |
| Item at index i of list lst | lst[i] |
| Length of list lst | len(lst) |
| Smallest item in list lst | min(lst) |
| Largest item in list lst | max(lst) |
| Sum of items in list lst | sum(lst) |
| Can you change a list? | YES. Lists are mutable. |
| To get more info on lists | help(list) |
| Adds item to the end of list lst | st.append(item) |
| Returns the number of occurrences of item in list lst | lst.count(item) |
| Returns the index of the first occurrence of item in list lst | lst.index(item) |
| Inserts item into list just before index index | lst.insert(index, item) |
| Removes last item in the list | lst.pop() |
| Removes first occurrence of item in the list | lst.remove(item) |
| Reverses the order of items in the list | lst.reverse() |
| Sorts the list | lst.sort() |
| slice list | A slice of a list is a list. When the indexing operator is applied to a list with two arguments, it will return a list. when the indexing operator is applied to a list with only one argument, the item of the list given spot is returned. |
Created by:
kbaldwin
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