IDLE を起動する

Python

Python IDLE を起動すると、次のようなプロンプトが現れます。

Python 2.5.2 (r252:60911, Feb 22 2008, 07:57:53) 

[GCC 4.0.1 (Apple Computer, Inc. build 5363)] on darwin

Type "copyright", "credits" or "license()" for more information.
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    Personal firewall software may warn about the connection IDLE

    makes to its subprocess using this computer's internal loopback

    interface.  This connection is not visible on any external

    interface and no data is sent to or received from the Internet.

    ****************************************************************

    

IDLE 1.2.2      

>>> type(reduce)

これを見て、reduce が「組み込み関数」であるのが分かります。