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Viewing changes to vendor/tornado/website/markdown/etree_loader.py

  • Committer: Jesse Andrews
  • Date: 2010-05-28 06:05:26 UTC
  • Revision ID: git-v1:bf6e6e718cdc7488e2da87b21e258ccc065fe499
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vendor/tornado/website/markdown/etree_loader.py
 
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from markdown import message, CRITICAL
 
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import sys
 
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## Import
 
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def importETree():
 
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    """Import the best implementation of ElementTree, return a module object."""
 
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    etree_in_c = None
 
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    try: # Is it Python 2.5+ with C implemenation of ElementTree installed?
 
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        import xml.etree.cElementTree as etree_in_c
 
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    except ImportError:
 
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        try: # Is it Python 2.5+ with Python implementation of ElementTree?
 
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            import xml.etree.ElementTree as etree
 
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        except ImportError:
 
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            try: # An earlier version of Python with cElementTree installed?
 
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                import cElementTree as etree_in_c
 
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            except ImportError:
 
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                try: # An earlier version of Python with Python ElementTree?
 
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                    import elementtree.ElementTree as etree
 
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                except ImportError:
 
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                    message(CRITICAL, "Failed to import ElementTree")
 
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                    sys.exit(1)
 
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    if etree_in_c and etree_in_c.VERSION < "1.0":
 
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        message(CRITICAL, "For cElementTree version 1.0 or higher is required.")
 
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        sys.exit(1)
 
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    elif etree_in_c :
 
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        return etree_in_c
 
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    elif etree.VERSION < "1.1":
 
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        message(CRITICAL, "For ElementTree version 1.1 or higher is required")
 
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        sys.exit(1)
 
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    else :
 
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        return etree
 
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