class BaseReporter(object):
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"""Delegate class to provider progress reporting for the resolver.
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"""
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def starting(self):
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"""Called before the resolution actually starts.
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"""
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def starting_round(self, index):
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"""Called before each round of resolution starts.
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The index is zero-based.
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"""
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def ending_round(self, index, state):
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"""Called before each round of resolution ends.
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This is NOT called if the resolution ends at this round. Use `ending`
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if you want to report finalization. The index is zero-based.
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"""
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def ending(self, state):
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"""Called before the resolution ends successfully.
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"""
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def adding_requirement(self, requirement, parent):
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"""Called when adding a new requirement into the resolve criteria.
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:param requirement: The additional requirement to be applied to filter
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the available candidaites.
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:param parent: The candidate that requires ``requirement`` as a
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dependency, or None if ``requirement`` is one of the root
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requirements passed in from ``Resolver.resolve()``.
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"""
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def backtracking(self, candidate):
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"""Called when rejecting a candidate during backtracking.
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"""
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def pinning(self, candidate):
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"""Called when adding a candidate to the potential solution.
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"""
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