import csv
import sys
L=[]
f = open('waluty.csv', 'rt')
try:
    reader = csv.reader(f, delimiter=';')
    for row in reader:
        L.append(row)
        
finally:
    f.close()

w1=list_plot([( i, L[i][1]) for i in range(len(L)) ], plotjoined=True,color='blue', legend_label='USD')
show(w1)

w2=list_plot([( i, L[i][2]) for i in range(len(L)) ], plotjoined=True,color='red', legend_label='EUR')
show(w2)

show(w1+w2)