## apply same change to every element in a list

new_list = [x[10:] for x in old_list] # strip away the first 10 characters for every string in the old_list

## Sorting

list.sort()

## Get unique elements from a list x

unique_list = list(set(x))

## Append an element to a list

list.append('New String')

## Extend a list

list1.extend(list2)  #the elements of list2 are added to the end of list1.
list1 +=list2

## replace characters in a string (e.g. substitute x with y)
string.replace('x', 'y')

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