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Is there is a tool similar to dir() for modules that will tell me what parameters a given function takes? For instance, I would like to do something like dir(os.rename) and have it tell me what parameters are documented so that I can avoid checking the documentation online, and instead use only the Python scripting interface to do this.
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Python help() function is used to get the documentation of specified module, class, function, variables etc. This method is generally used with python interpreter console to get details about python objects.
The four steps to defining a function in Python are the following: Use the keyword def to declare the function and follow this up with the function name. Add parameters to the function: they should be within the parentheses of the function. End your line with a colon.
One introspection function that's particularly useful in our development is the isinstance() function.
I realize that you're more interested in help(thing) or thing.__doc__, but if you're trying to do programmatic introspection (instead of human-readable documentation) to find out about calling a function, then you can use the inspect module, as discussed in this question.
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help(thing) pretty prints all the docstrings that are in the module, method, whatever ...
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