使用dir(__builtins__)可以給出所有內建函數的list

你要使用哪個，打印該函數的__doc__即可知道其用法

比如
>>> dir(map)
['__call__', '__class__', '__cmp__', '__delattr__', '__doc__', '__getattribute__', '__hash__', '__init__', '__module__', '__name__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__self__', '__setattr__', '__str__']
>>> print map.__doc__
map(function, sequence[, sequence, ...]) -> list

Return a list of the results of applying the function to the items of
the argument sequence(s). If more than one sequence is given, the
function is called with an argument list consisting of the corresponding
item of each sequence, substituting None for missing values when not all
sequences have the same length. If the function is None, return a list of
the items of the sequence (or a list of tuples if more than one sequence).
>>>

至于你想要內建函數的詳細說明，我是不會給你的（我也沒有，呵呵）
但都在文檔里面

不知道為什么你們不先看看文檔再來問問題呢。。。