Programmatically enter password on prompt within Python?

I need function开发者_开发问答ality similar to the Unix expect from within a Python script, as an external executable is prompting for password. I am currently doing this:

p = subprocess.Popen("execA",stdout=subprocess.PIPE,stderr=subprocess.STDOUT)

where execA is prompting for password. I'd like to wrap it with "expect" to supply said password.

There seem to be a few alternatives:

Pexpect - Noah Spurrier

Python Expect

What is the best way to do this? If there's a more efficient way to go about it, I'd love to know.

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Pexpect is the one I've used in the past to do things like this.

Though depending on the program it might be sufficient to just write to it's stdin?

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Those kind of programs typically access the tty directly and put it in "raw" mode. So the stdio pipes don't work. You need to spawn the subprocess in a pty. A simple read/write with that might work. Those "expect-like" modules are usually for more complex scenarios.

Of course I prefer this one, but I'm not sure it will work on OSX.