12.1. 概览 · Dive Into Python

# 12.1. 概览你用 Google，对吧？它是一个很流行的搜索引擎。你是否希望能以程序化的方式访问 Google 的搜索结果呢？现在你能做到了。下面是一个用 Python 搜索 Google 的程序。 ## 例 12.1. `search.py` ``` from SOAPpy import WSDL # you'll need to configure these two values; # see http://www.google.com/apis/ WSDLFILE = '/path/to/copy/of/GoogleSearch.wsdl' APIKEY = 'YOUR_GOOGLE_API_KEY' _server = WSDL.Proxy(WSDLFILE) def search(q): """Search Google and return list of {title, link, description}""" results = _server.doGoogleSearch( APIKEY, q, 0, 10, False, "", False, "", "utf-8", "utf-8") return [{"title": r.title.encode("utf-8"), "link": r.URL.encode("utf-8"), "description": r.snippet.encode("utf-8")} for r in results.resultElements] if __name__ == '__main__': import sys for r in search(sys.argv[1])[:5]: print r['title'] print r['link'] print r['description'] print ``` 你可以在较大的程序中以模块导入并使用它，也可以在命令行上运行这个脚本。在命令行上，需要把查询字符串作为命令行参数使用，之后就会打印出最前面的五个 Google 查询结果，包括：URL、标题和描述信息。下面是以 “python” 作为命令行参数的查询结果。 ## 例 12.2. `search.py` 的使用样例 ``` C:\diveintopython\common\py> python search.py "python" Python Programming Language http://www.python.org/ Home page for Python, an interpreted, interactive, object-oriented, extensible programming language. ... Python is OSI Certified Open Source: OSI Certified. Python Documentation Index http://www.python.org/doc/ ... New-style classes (aka descrintro). Regular expressions. Database API. Email Us. docs@python.org. (c) 2004\. Python Software Foundation. Python Documentation. ... Download Python Software http://www.python.org/download/ Download Standard Python Software. Python 2.3.3 is the current production version of Python. ... Python is OSI Certified Open Source: Pythonline http://www.pythonline.com/ Dive Into Python http://diveintopython.org/ Dive Into Python. Python from novice to pro. Find: ... It is also available in multiple languages. Read Dive Into Python. This book is still being written. ... ``` ## 进一步阅读 * http://www.xmethods.net/ 是一个访问 SOAP web 服务的公共知识库。 * SOAP 规范相当可读，如果你喜欢这类东西的话。