Simplify IOPlugin.Data initialization #63
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Remove the need to specify every component of Data. This introduces a new IOPlugin.PersistedData member which is the same as IOPlugin.Data, except that it is initialized with boolean False instead of None. Also remove account_key and key from FullChainFile, it is not stored by ChainFile. Replace a weird `IOPlugin.EMPTY_DATA._replace(key=X)` hack by the more intuitive `Data(key=X)`. The `__defaults__` construct is taken from http://stackoverflow.com/a/18348004 and documented in https://docs.python.org/2/reference/datamodel.html and https://docs.python.org/3/reference/datamodel.html
Lekensteyn
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Reusing data.account_key or data.key was intentional - it plays well with the inheritance
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Remove the need to specify every component of Data. This introduces a
new IOPlugin.PersistedData member which is the same as IOPlugin.Data,
except that it is initialized with boolean False instead of None.
Also remove account_key and key from FullChainFile, it is not stored by
ChainFile. Replace a weird
IOPlugin.EMPTY_DATA._replace(key=X)hack bythe more intuitive
Data(key=X).The
__defaults__construct is taken fromhttp://stackoverflow.com/a/18348004 and documented in
https://docs.python.org/2/reference/datamodel.html and
https://docs.python.org/3/reference/datamodel.html