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Add SAXReaderNotAvailable, and use it to distinguish between an

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ImportError, and a missing driver.
This commit is contained in:
Martin v. Löwis 2000-10-06 17:41:52 +00:00
parent 75698a4937
commit 962c9e7f91
5 changed files with 44 additions and 5 deletions
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13
Lib/xml/sax/__init__.py
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@ -22,7 +22,8 @@ expatreader -- Driver that allows use of the Expat parser with SAX.
from xmlreader import InputSource
from handler import ContentHandler, ErrorHandler
from _exceptions import SAXException, SAXNotRecognizedException, \
SAXParseException, SAXNotSupportedException
SAXParseException, SAXNotSupportedException, \
SAXReaderNotAvailable
def parse(source, handler, errorHandler=ErrorHandler()):
@ -74,9 +75,17 @@ def make_parser(parser_list = []):
try:
return _create_parser(parser_name)
except ImportError,e:
import sys
if sys.modules.has_key(parser_name):
# The parser module was found, but importing it
# failed unexpectedly, pass this exception through
raise
except SAXReaderNotAvailable:
# The parser module detected that it won't work properly,
# so try the next one
pass
raise SAXException("No parsers found", None)
raise SAXReaderNotAvailable("No parsers found", None)
# --- Internal utility methods used by make_parser