plot_performance

import matplotlib.pyplot as plot
from random import randint

#count items in a list
def count_items(target, my_list):

    item_count=0
    for i in my_list:
        if i==target:
            item_count+=1

    return item_count

#count items in a range (passed as [lower, upper])
def count_in_range(target_range, my_list):

    my_count=0
    for i in my_list:
        if i>=target_range[0] and i<=target_range[1] :
            my_count+=1

    return my_count

#count vowels in a string
def count_vowels_in_string(my_string):
    vowels="aeiou"
    my_count=0
    lc_string=my_string.lower()
    for i in vowels:
        my_count=my_count+lc_string.count(i)

    return my_count

#data to work with
scores=[]
for i in range(30):
    scores.append(randint(0,10))
names=["fred", "bert", "harry", "fred"]
my_word="supercalifragilisticexpialidociousUMDIDDLEIDDLEIDDLE"

#produce a bar chart of scores
print(scores)
performance=[]  #will contain a number for each score
for i in range(11):
    performance.append(count_items(i, scores))

plot.bar(range(11), performance, align='center', alpha=0.5)

plot.xticks(range(11))
plot.ylabel('Score frequency')
plot.title('Scores on a quiz')

plot.show()
plot.savefig(fname="Quiz Chart.png")