python subprocess call [closed]

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The following is a python code using the subprocess module. Can someone explain what the code is doing?

process = subprocess.Popen(['aspell', 'list'],
    stdin = subproc开发者_Python百科ess.PIPE,  # reading from the op of a pipe.
    stdout = subprocess.PIPE) # writing to the i/p of a pipe

(result, stderrdata) = process.communicate(" ".join(text))

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Its a really badly laid out script for opening the process aspell giving it the argument list. then piping the stdout and stderr into a tuple while feeding ' '.join(text) as stdin to the process.