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==========
Strategies
==========
Authoring your own Strategy
===========================
Your function should take the arguments of (``merger``, ``path``, ``base_value``, ``value_to_merge_in``).
Strategies are passed as a list, and the
merge runs through each strategy in the order passed into the merger,
stopping at the first one to return a value that is not
the sentinel value deepmerge.STRATEGY_END.
For example, this function would not be considered valid for any base value besides the string "foo":
.. code-block:: python
from deepmerge import STRATEGY_END
def return_true_if_foo(config, path, base, nxt):
if base == "foo":
return True
return STRATEGY_END
Note that the merger does not copy values before passing them into mergers for performance reasons.
Builtin Strategies
===========================
These are the built in strategies provided by deepmerge.
.. autoclass:: deepmerge.strategy.type_conflict.TypeConflictStrategies
:members:
:undoc-members:
.. autoclass:: deepmerge.strategy.fallback.FallbackStrategies
:members:
:undoc-members:
.. autoclass:: deepmerge.strategy.dict.DictStrategies
:members:
:undoc-members:
.. autoclass:: deepmerge.strategy.list.ListStrategies
:members:
:undoc-members:
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