popen2 + passwd

[Jp Calderone]

Can anyone tell me why this doesn't work?

import popen2

i, o = popen2.popen2('passwd bin')
pwd = '12345ASD'
o.write(pwd + '\n')
o.write(pwd + '\n')
i.close()
o.close()

 Running it through the interpreter yields no output (as it should),
but the password for the bin user doesn't change to what I'd expect
it to (12345ASD), but to something else.

 Thanks in advance,
   Jp

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