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Python Database Error Handling

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Python Raise Runtime Error

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Python Exception Handling Best Practices

August 2015 July 2015 June 2015 May 2015 April 2015 March 2015 January 2015 December 2014 November 2014 October 2014 September 2014 August 2014 July 2014 June 2014 May 2014 April 2014 March python mysqldb exception handling 2014 February 2014 January 2014 December 2013 November 2013 October 2013 September 2013 August 2013 July 2013 June 2013 May 2013 April 2013 March 2013 February 2013 January 2013 December 2012 November 2012 October 2012 September 2012 August 2012 June 2012 May 2012 April 2012 March 2012 February 2012 January 2012 December 2011 November 2011 October 2011 September 2011 August 2011 July 2011 June 2011 May 2011 python raise runtime error example April 2011 March 2011 February 2011 December 2010 October 2010 September 2010 August 2010 July 2010 June 2010 May 2010 April 2010 March 2010 February 2010 January 2010 December 2009 November 2009 October 2009 September 2009 August 2009 July 2009 June 2009 May 2009 April 2009 March 2009 February 2009 January 2009 December 2008 November 2008 October 2008 September 2008 August 2008 July 2008 June 2008 May 2008 April 2008 March 2008 February 2008 January 2008 December 2007 November 2007 October 2007 September 2007 August 2007 July 2007 June 2007 May 2007 April 2007 March 2007 February 2007 January 2007 December 2006 Python Exception Handling Techniques

Error reporting and processing through exceptions is one of Python’s key features. Care must be taken when handling exceptions to ensure proper application cleanup while maintaining useful error reporting. Error reporting and processing through exceptions is one of Python’s key features. Unlike C, where the common way to report errors is through function return values that then have to be checked on every invocation, in Python a programmer can raise an exception at any point in a program. When the exception is raised, program execution is interrupted as the interpreter searches back

is 'module.Error'. In MySQL it is 'MySQLdb.Error'. Every DB-API https://doughellmann.com/blog/2009/06/19/python-exception-handling-techniques/ statement that you execute has the potential to raise an exception. So any time you execute a database query you should surround it http://www.mikusa.com/python-mysql-docs/exceptions.html with a try/exception block. This includes connections, cursor requests, and statement executions. # Get data from database try: cur.execute("SELECT * FROM song") rows = cur.fetchall() except MySQLdb.Error, e: try: print "MySQL Error [%d]: %s" % (e.args[0], e.args[1]) except IndexError: print "MySQL Error: %s" % str(e) # Print results in comma delimited format for row in rows: for col in row: print "%s," % col print "\n" <-- Home -->

Python Network ≡ Menu Search This Site GO A A Smaller Larger Reset Socialize Google+ Facebook Twitter Chat on IRC Sign In Sign Up https://www.python.org/dev/peps/pep-0249/ / Register Sign In About Applications Quotes Getting Started Help Python Brochure Downloads All releases Source code Windows Mac OS X Other Platforms License Alternative Implementations Documentation Docs Audio/Visual Talks https://www.packtpub.com/books/content/exception-handling-mysql-python Beginner's Guide Developer's Guide FAQ Non-English Docs PEP Index Python Books Community Diversity IRC Mailing Lists Python Conferences Special Interest Groups Python Wiki Python Logo Merchandise Community Awards Success Stories python raise Arts Business Education Engineering Government Scientific Software Development News Python News Community News PSF News PyCon News Events Python Events User Group Events Python Events Archive User Group Events Archive Submit an Event Python>>> Python Developer's Guide>>> PEP Index>>> PEP 249 -- Python Database API Specification v2.0 PEP 249 -- Python Database API Specification v2.0 PEP: 249 Title: Python Database API python raise runtime Specification v2.0 Author: mal at lemburg.com (Marc-André Lemburg) Discussions-To: db-sig at python.org Status: Final Type: Informational Created: Post-History: Replaces: 248 Contents Introduction Module Interface Constructors Globals Exceptions Connection Objects Connection methods Cursor Objects Cursor attributes Cursor methods Type Objects and Constructors Implementation Hints for Module Authors Optional DB API Extensions Optional Error Handling Extensions Optional Two-Phase Commit Extensions TPC Transaction IDs TPC Connection Methods Frequently Asked Questions Major Changes from Version 1.0 to Version 2.0 Open Issues Footnotes Acknowledgements Copyright Introduction This API has been defined to encourage similarity between the Python modules that are used to access databases. By doing this, we hope to achieve a consistency leading to more easily understood modules, code that is generally more portable across databases, and a broader reach of database connectivity from Python. Comments and questions about this specification may be directed to the SIG for Database Interfacing with Python . For more information on database interfacing with Python and available packages see the Database Topic Guide . This document describes the Python Database API Specification 2.0 and a set of c

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