mirror of
https://github.com/rembo10/headphones.git
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ab4dd18be4
Mostly just updating libraries, removing string encoding/decoding, fixing some edge cases. No new functionality was added in this commit.
57 lines
1.6 KiB
Python
57 lines
1.6 KiB
Python
from __future__ import division, absolute_import, print_function
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import yaml
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__all__ = [
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'ConfigError', 'NotFoundError', 'ConfigValueError', 'ConfigTypeError',
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'ConfigTemplateError', 'ConfigReadError']
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YAML_TAB_PROBLEM = "found character '\\t' that cannot start any token"
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# Exceptions.
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class ConfigError(Exception):
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"""Base class for exceptions raised when querying a configuration.
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"""
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class NotFoundError(ConfigError):
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"""A requested value could not be found in the configuration trees.
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"""
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class ConfigValueError(ConfigError):
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"""The value in the configuration is illegal."""
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class ConfigTypeError(ConfigValueError):
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"""The value in the configuration did not match the expected type.
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"""
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class ConfigTemplateError(ConfigError):
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"""Base class for exceptions raised because of an invalid template.
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"""
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class ConfigReadError(ConfigError):
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"""A configuration source could not be read."""
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def __init__(self, name, reason=None):
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self.name = name
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self.reason = reason
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message = u'{0} could not be read'.format(name)
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if (isinstance(reason, yaml.scanner.ScannerError)
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and reason.problem == YAML_TAB_PROBLEM):
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# Special-case error message for tab indentation in YAML markup.
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message += u': found tab character at line {0}, column {1}'.format(
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reason.problem_mark.line + 1,
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reason.problem_mark.column + 1,
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)
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elif reason:
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# Generic error message uses exception's message.
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message += u': {0}'.format(reason)
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super(ConfigReadError, self).__init__(message)
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