Average of lists

[leandemg]

Hi I want to know how to return the average of multiple lists

What am I doing wrong here? My code needs to be defined the way it is: average(m: List[List[int]]) -> float:
Then python keeps saying Lists is not defined...

def average(m: List[List[int]]) -> float:
    """
    Examples
    >>> average([])
    0
    >>> m = [[1,2,3],[4,5,6],[7,8,9]]
    >>> average(m)
    5.0
    >>> m = [[1,2,2,5],[4,5,4,8],[7,9,9,1],[1,2,1,4]]
    >>> average(m)
    4.0625
    """
    Lists = []
    for x in m:
        
    averages = sum(m) / len(m)
    return averages

---

def average(m: List[List[int]]) -> float:
"""
Examples
>>> average([])
0
>>> m = [[1,2,3],[4,5,6],[7,8,9]]
>>> average(m)
5.0
>>> m = [[1,2,2,5],[4,5,4,8],[7,9,9,1],[1,2,1,4]]
>>> average(m)
4.0625
"""
averages = sum(m) / len(m)
return averages

Traceback (most recent call last):
File "<pyshell#25>", line 1, in <module>
def average(m: List[List[int]]) -> float:
NameError: name 'List' is not defined


Sorry about that, its my first time here Im getting used to it.
I also deleted the codes
Lists = []
for x in m:

I know I'm supposed to use something like this for lists but I dont know how to since there is multiple lists.