[issue15546] Iteration breaks with bz2.open(filename,'rt')

[Antoine Pitrou]

Antoine Pitrou added the comment:

> I propose amending BZ2File.read1() to make as many reads
> from the underlying file as necessary to return a non-empty result.

Agreed. IMO, read1()'s contract should be read as a best-effort thing, not an absolute guarantee. Returning an empty string when there is still data available is wrong.

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<http://bugs.python.org/issue15546>
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