that's one aspect of dynamic typing that i strongly dislike. you can't figure out what a function does by looking at its signature. if documentation is absent (which is almost always the case), a coding task turns into a reverse engineering task.
A good repl that automatically prints out the function's heredocs is usually enough for me. I like bpython particularly because it shows the argument list and the heredoc as soon as you type the opening parenthesis for a function call. In other REPLs you can usually call a docs(fn) or a source(fn) to handle the rest.
