def get_as_dtype(self, section, option, dtype, default=None):
"""Convenience method to query options with a custom default and type
This method simply wraps the base class method, but adds a `default`
keyword argument. The value of `default` is returned whenever the
config parser does not have the requested option and/or section.
In addition, the returned value is converted into the specified `dtype`.
"""
if not self.has_option(section, option):
return default
try:
return SafeConfigParser._get(self, section, dtype, option)
except ValueError as e:
# provide somewhat descriptive error
raise ValueError("Failed to obtain value from configuration for %s.%s. " \
"Original exception was: %s" % (section, option, e))
