An abstract filter.
Methods
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__init__
_flush
attach
close
flush
last
write
writelines
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__init__
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__init__ ( self )
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_flush
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_flush ( self )
The _flush method should always flush and should not be
overridden.
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attach
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attach ( self, filter )
Attach a filter to this one.
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close
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close ( self )
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flush
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flush ( self )
The flush method can be overridden.
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last
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last ( self )
Find the last filter in this chain.
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write
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write ( self, data )
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writelines
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writelines ( self, lines )
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