# Plot
import matplotlib.pyplot as plot

# performance = [2,0,2,3,2,4,5,3,2,4,3]
from random import randint

def count(scores):
    tens = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
    for x in range(11):
        for score in scores:
            if score == x:
                tens[x] += 1
    return(tens)

scores = []
for i in range(0, 30):
    scores.append(randint(0,10))

top_scorers = count(scores)
print(top_scorers, " learners got top marks")



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

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

plot.show()