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Improve performance on dataframe to line conversion #486

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Aug 11, 2017
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Improve performance on dataframe to line conversion #486

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13 changes: 3 additions & 10 deletions influxdb/_dataframe_client.py
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Original file line number Diff line number Diff line change
Expand Up @@ -302,17 +302,10 @@ def _convert_dataframe_to_lines(self,
tag_df = self._stringify_dataframe(
tag_df, numeric_precision, datatype='tag')

# prepend tag keys
tag_df = tag_df.apply(
lambda s: s.apply(
lambda v, l: l + '=' + v if v else None, l=s.name))

# join tags, but leave out None values
# join preprendded tags, leaving None values out
tags = tag_df.apply(
lambda r: ','.join(r.dropna()), axis=1)

# prepend comma
tags = tags.apply(lambda v: ',' + v if v else '')
lambda s: [',' + s.name + '=' + v if v else '' for v in s])
tags = tags.sum(axis=1)

del tag_df
else:
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