Python help:
in CMD / Terminal:
python -m pydoc module_and./or_function
python -m pydoc -k searchword
python -m pydoc -b      #start a web server, browse the documentation

in Shell:
dir(__builtins__)
help(builtin_func)
help(myVar)
help(myVar.func)

  import some_module, then:
dir(some_module)       #brief
help(some_module)      #more info
help(some_module.some_func)  #specific function etc.

IDLE:
object. then Ctrl Space for a list of methods, click/doubleclick