20160614-mean, format usage

1, mean, format usage

1  Import numpy AS NP
 2      # "Import numpy AS NP" meaning assigning numpy to np, np below which represents numpy. 
. 3 List1 = [91 is, 95, 97, 99 ]
 . 4 averange = np.mean (List1)
 . 5      # "np.mean" averaging list "list1" numpy in the database, mean mean averaging 
. 6  Print ( ' GPA} is { ' .format (averange))
 . 7      # For printing average list1 directly "print (averange)", the result "95.5" 
8      # front to increase the average string in the format: print ( "str {}". format ())