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