The easy way to get one answer for buildin funcs and methods is the help
function in the interactive interpreter (and Idle's and probably other
imitations thereof) is, for example,
>>> help(str.join)
Help on method_descriptor:
join(...)
S.join(sequence) -> string
Return a string which is the concatenation of the strings in the
sequence. The separator between elements is S.
To remind how to use 'help', 'help' is more informative than 'help(help)'
;-)
Terry Jan Reedy
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