Package duplicity :: Module diffdir :: Class TarBlockIter

Class TarBlockIter

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A bit like an iterator, yield tar blocks given input iterator

Unlike an iterator, however, control over the maximum size of a tarblock is available by passing an argument to next(). Also the get_footer() is available.

Instance Methods

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__init__(self, input_iter)
TarBlockIter initializer

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__iter__(self)

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get_footer(self)
Return closing string for tarfile, reset offset

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get_previous_index(self)
Return index of last tarblock, or None if no previous index

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next(self, size=1048576)
Return next block, no bigger than size, and update offset

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process(self, val, size)
Turn next value of input_iter into a TarBlock

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process_continued(self, size)
Get more tarblocks

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recall_index(self)
Retrieve index remembered with remember_next_index

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remember_next_index(self)
When called, remember the index of the next block iterated

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tarinfo2tarblock(self, index, tarinfo, file_data='')
Make tarblock out of tarinfo and file data source code

Method Details

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process_continued(self, size)

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Get more tarblocks

If processing val above would produce more than one TarBlock, get the rest of them by calling process_continue.