previous value api
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@ -225,6 +225,9 @@ class Option(HiddenBaseType, DisabledBaseType):
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"config *must* be only the **parent** config (not the toplevel config)"
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return config._cfgimpl_context._cfgimpl_values.getowner(self)
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def get_previous_value(self, config):
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return config._cfgimpl_context._cfgimpl_values.get_previous_value(self)
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def reset(self, config):
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"""resets the default value and owner
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"""
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@ -76,6 +76,13 @@ class Values(object):
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else:
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self.previous_values[opt] = old_value
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def get_previous_value(self, opt):
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if opt in self.previous_values:
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prec_value = self.previous_values[opt]
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else:
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prec_value = None
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return prec_value
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def _is_empty(self, opt, value=None):
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"convenience method to know if an option is empty"
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if value is not None:
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