def list_max(l):
    max_val = l[0]
    
    for val in l:
        if val > max_val:
            max_val = val
            
    return max_val






def list_max_better(l):
    if l == []:
        raise Exception("list must be non-empty")
    
    max_val = l[0]
    
    for val in l:
        if val > max_val:
            max_val = val
            
    return max_val

def get_scores():
    print("Enter the scores one at a time.  Blank score finishes.")
    
    scores = []
    line = input("Enter score: ")
    
    while line != "":
        scores.append(float(line))
        line = input("Enter score: ")
    
    return scores

def get_scores_better():
    print("Enter the scores one at a time.  Blank score finishes.")
    
    scores = []
    line = input("Enter score: ")
    
    while line != "":
        try:
            scores.append(float(line))
        except ValueError:
            print("Enter numbers only!")
            
        line = input("Enter score: ")
     
    return scores

def print_file_stats(filename):
    file = open(filename, "r")
    
    longest = ""
    shortest = ""
    total_length = 0
    count = 0
    
    for word in file:
        word = word.strip()
        
        if len(word) > len(longest):
            longest = word
            
        if shortest == "" or len(word) < len(shortest):
            shortest = word
            
        total_length += len(word)
        count += 1
        
    file.close()
   
    print("Number of words: " + str(count))
    print("Longest word: " + longest)
    print("Shortest word: " + shortest)
    print("Avg. word length: " + str(float(total_length)/count))
    
def print_file_stats_better(filename):
    try:
        print_file_stats(filename)
    except FileNotFoundError:
        print("File doesn't exist.  No stats :(")
    except ZeroDivisionError:
        pass