::len
set(T).len() - return number of elements in a set
char.len() - returns the length of a character (which is always 1)
list(A).len() - number of elements in list
string.len() - returns the length of a string
dict(A.len(B)) - return the number of items in a dictionary
set(T).len() returns the number of elements in a set.
list(A).len() returns the number of elements in a list.
string.len() returns the length of a string in bytes.
dict(A.len(B)) returns the number of items in a dictionary
