cascading python executions only if return code is 0

Frank Cui ycui at
Sun Dec 22 19:37:04 CET 2013

hey guys,
I have a requirement where I need to sequentially execute a bunch of executions, each execution has a return code. the followed executions should only be executed if the return code is 0. is there a cleaner or more pythonic way to do this other than the following ? 
if a() == 0:    if b() == 0:        c()
Thanks for your input.
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