insert( ,einserts at index pop(ireturns the element and removes it from the list remove(xremoves from reverse(reverses the order of sort(key ,[reverse]sorts with optional key and reverse when we are working with listsand other container objectsit is important to understand the internal mechanism that python uses to copy them python creates real copies only if it has to when we assign the value of variable to another variableboth of these variables point to the same memory location new slot in memory will only be allocated if one of the variables changes this has important consequences for mutable compound objects such as lists consider the following codehereboth the list and list variables point to the same slot in memory when we change the variable to we are changing the same variable that list is pointing to an important feature of list' is that they can contain nested structuresthat isother listsfor examplewe can access the lists values using the bracket operators and since lists are mutablethey are copied in place the following example demonstrates how we can use this to update elementsfor examplehere we are raising the price of flour by percent