diff --git a/influxdb/_dataframe_client.py b/influxdb/_dataframe_client.py
index 5f81e4c8..4fc5de2b 100644
--- a/influxdb/_dataframe_client.py
+++ b/influxdb/_dataframe_client.py
@@ -44,8 +44,8 @@ def write_points(self,
dataframe,
measurement,
tags=None,
- tag_columns=[],
- field_columns=[],
+ tag_columns=None,
+ field_columns=None,
time_precision=None,
database=None,
retention_policy=None,
@@ -72,6 +72,10 @@ def write_points(self,
figures for float and all significant figures for int datatypes.
"""
+ if tag_columns is None:
+ tag_columns = []
+ if field_columns is None:
+ field_columns = []
if batch_size:
number_batches = int(math.ceil(len(dataframe) / float(batch_size)))
for batch in range(number_batches):
@@ -166,8 +170,8 @@ def _convert_dataframe_to_json(self,
dataframe,
measurement,
tags=None,
- tag_columns=[],
- field_columns=[],
+ tag_columns=None,
+ field_columns=None,
time_precision=None):
if not isinstance(dataframe, pd.DataFrame):
@@ -179,9 +183,9 @@ def _convert_dataframe_to_json(self,
PeriodIndex.')
# Make sure tags and tag columns are correctly typed
- tag_columns = tag_columns if tag_columns else []
- field_columns = field_columns if field_columns else []
- tags = tags if tags else {}
+ tag_columns = tag_columns if tag_columns is not None else []
+ field_columns = field_columns if field_columns is not None else []
+ tags = tags if tags is not None else {}
# Assume field columns are all columns not included in tag columns
if not field_columns:
field_columns = list(
@@ -221,8 +225,8 @@ def _convert_dataframe_to_json(self,
def _convert_dataframe_to_lines(self,
dataframe,
measurement,
- field_columns=[],
- tag_columns=[],
+ field_columns=None,
+ tag_columns=None,
global_tags={},
time_precision=None,
numeric_precision=None):
@@ -242,6 +246,8 @@ def _convert_dataframe_to_lines(self,
field_columns = []
if tag_columns is None:
tag_columns = []
+ if global_tags is None:
+ global_tags = {}
# Make sure field_columns and tag_columns are lists
field_columns = list(field_columns) if list(field_columns) else []
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