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avoid unbound local ref on exc before first sample #1713

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Jan 26, 2017
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avoid unbound local ref on exc before first sample #1713

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10 changes: 7 additions & 3 deletions pymc3/sampling.py
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Original file line number Diff line number Diff line change
Expand Up @@ -189,11 +189,15 @@ def _sample(draws, step=None, start=None, trace=None, chain=0, tune=None,
if progressbar:
sampling = tqdm(sampling, total=draws)
try:
strace = None
for strace in sampling:
pass
except KeyboardInterrupt:
strace.close()
return MultiTrace([strace]) # pylint: disable=undefined-loop-variable
result = [] if strace is None else [strace]
except KeyboardInterrupt as exc:
if strace is not None:
strace.close()
raise exc
return MultiTrace(result)


def iter_sample(draws, step, start=None, trace=None, chain=0, tune=None,
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