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#!/usr/bin/env python
"""Compiled modules may be out of date or missing"""
import os
__author__ = "Peter Maxwell"
__copyright__ = "Copyright 2007-2009, The Cogent Project"
__credits__ = ["Peter Maxwell"]
__license__ = "GPL"
__version__ = "1.4.1"
__maintainer__ = "Peter Maxwell"
__email__ = "pm67nz@gmail.com"
__status__ = "Production"
class ExpectedImportError(ImportError):
pass
def importVersionedModule(name, globals, min_version, log, alt_desc):
if os.environ.has_key('COGENT_PURE_PYTHON'):
log.info('Not using compiled module "%s". Will use %s.' %
(name, alt_desc))
raise ExpectedImportError
try:
m = __import__(name, globals)
except ImportError:
log.warning('Compiled module "%s" not found. Will use %s.' %
(name, alt_desc))
raise ExpectedImportError
version = getattr(m, 'version_info', (0, 0))
desc = '.'.join(str(n) for n in version)
min_desc = '.'.join(str(n) for n in min_version)
max_desc = str(min_version[0])+'.x'
if version < min_version:
log.warning('Compiled module "%s" is too old as %s < %s. '
'Will use %s.' % (name, desc, min_desc, alt_desc))
raise ExpectedImportError
if version[0] > min_version[0]:
log.warning('Compiled module "%s" is too new as %s > %s. '
'Will use %s.' % (name, desc, max_desc, alt_desc))
raise ExpectedImportError
return m
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