Python copy file

#copy txt file
rf = open('input.txt', 'r')
wf = open('output.txt', 'w')

for i in rf:
    wf.write(i)


#copy image - binary
rf = open('relax.jpg', 'rb')
wf = open('relax1.jpg', 'wb')

for i in rf:
    wf.write(i)