'''weatherstats.py

   Skeleton file for homework assignment.
'''

import sys

print(sys.argv)

# sys.argv is a list of command-line arguments.  Get acquainted with it by
# trying
#     $ python3 weatherstats.py msp-temperatures.txt
#     $ python3 weatherstats.py a b c
#     $ python3 weatherstats.py 'a b c'
#     $ python3 weatherstats.py
# and think about how to process command-line arguments.

def loadWeatherData(fileName):
    '''Loads temperature data from the specified file into a
       list of lists of integers, and returns the list.  This
       function assumes that each line of the file consists of
       a year followed by some number of temperatures, all
       separated by commas.  For example, if the file looks
       like this: 

           1939,-10,5,3,14,...
           1940,2,8,-1,4,...
           ...
           2014,7,12,3,5,-2,...

       (which means that on Jan 1, 1939, the high temperature
       was 10, etc.), then loadWeatherData will return a list
       of lists like this:

           [[1939,-10,5,3,14,...], [1940,2,...], ..., [2014,7,12,...]]
    '''
    pass

def mean(listOfNumbers):
    '''Returns the mean of the specified list of numbers
       if the list contains at least one element.  Otherwise,
       returns 0.  This function assumes that its parameter refers
       to a (possibly empty) list of numbers.'''
    pass

def standardDeviation(listOfNumbers):
    '''Returns the standard deviation of the specified list of
       numbers if the list contains 2 or more elements.  Otherwise,
       returns 0.  This function assumes that its parameter refers
       to a (possibly empty) list of numbers.'''
    pass