Path: csiph.com!x330-a1.tempe.blueboxinc.net!usenet.pasdenom.info!gegeweb.org!de-l.enfer-du-nord.net!feeder1.enfer-du-nord.net!feeds.phibee-telecom.net!newsfeed.xs4all.nl!newsfeed6.news.xs4all.nl!xs4all!post.news.xs4all.nl!not-for-mail Return-Path: X-Original-To: python-list@python.org Delivered-To: python-list@mail.python.org X-Spam-Status: OK 0.055 X-Spam-Evidence: '*H*': 0.89; '*S*': 0.00; 'python': 0.08; 'none):': 0.09; 'def': 0.13; 'subject:function': 0.16; 'syntaxerror:': 0.16; 'syntax': 0.16; 'subject:question': 0.16; 'invalid': 0.28; 'print': 0.29; 'error': 0.30; 'message-id:@gmail.com': 0.31; 'file': 0.34; 'curious': 0.34; 'to:addr:python-list': 0.35; 'received:209.85.160': 0.36; 'to:name:python-list': 0.37; 'charset :us-ascii': 0.37; 'received:google.com': 0.37; 'happens': 0.38; 'received:209.85': 0.38; 'received:192': 0.38; 'received:209.85.160.46': 0.39; 'received:mail- pw0-f46.google.com': 0.39; 'received:209': 0.39; 'to:addr:python.org': 0.40; 'type': 0.61; 'header:Message-Id:1': 0.62; 'below': 0.62 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=from:content-type:content-transfer-encoding:subject:date:message-id :to:mime-version:x-mailer; bh=vhW4WMfhDY1/yD/Ojo0VSg7PHoh9X+OA4IWbBRS9UmU=; b=b6eNDoQmhG17ABXhpOGbM3YEM6I/ECIkrgmjPMeLL8SKM7jA4R/Nm4T9ht/FHEEtWe xS0TCz5cF/8aHnGVCXIV8UQwUbs4UldtvmpFv3scZn94d8KjAk7EjZjltg8SjAGg51L1 F0+7ZaFjEW96GQ/6qW9Ze+h1h5eKEkAuc34Eo= From: Zheng Li Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Subject: question about function pointer Date: Fri, 17 Feb 2012 16:53:00 +0900 To: python-list Mime-Version: 1.0 (Apple Message framework v1257) X-Mailer: Apple Mail (2.1257) X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: General discussion list for the Python programming language List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Newsgroups: comp.lang.python Message-ID: Lines: 16 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1329465188 news.xs4all.nl 6982 [2001:888:2000:d::a6]:42729 X-Complaints-To: abuse@xs4all.nl Xref: x330-a1.tempe.blueboxinc.net comp.lang.python:20539 def method1(a = None): print a i can call it by method1(*(), **{'a' : 1}) I am just curious why it works and how it works? and what do *() and **{'a' : 1} mean? when I type *() in python shell, error below happens File "", line 1 *() ^ SyntaxError: invalid syntax