Print in PythonWin

[Shi Mu]

In the PythonWin's interactive window,
why sometimes I need type the command two times to make it work?
for example, I execute "print testList" two times to make it work.
Why?

print testList
print testList

['w', 'e', ' ', 'w', 'a', 'n', 't', ' ', 't', 'o', ' ', 'l', 'e', 'a',
'r', 'n', ' ', 'p', 'y', 't', 'h', 'o', 'n']