fix: Pandas 3.0 warning for inplace method (#642)

* silence pandas 3.0 warning * add to changelog * docs: Update CHANGELOG.md --------- Co-authored-by: Jakub Bednář <[email protected]>
influxdata · Feb 6, 2024 · ed89701 · ed89701
1 parent 293ed7f
commit ed89701
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -2,7 +2,7 @@
 
 ### Bug Fixes
 1. [#636](https://github.com/influxdata/influxdb-client-python/pull/636): Handle missing data in data frames
-2. [#638](https://github.com/influxdata/influxdb-client-python/pull/638): Refactor DataFrame operations to avoid chained assignment and resolve FutureWarning in pandas, ensuring compatibility with pandas 3.0.
+2. [#638](https://github.com/influxdata/influxdb-client-python/pull/638), [#642](https://github.com/influxdata/influxdb-client-python/pull/642): Refactor DataFrame operations to avoid chained assignment and resolve FutureWarning in pandas, ensuring compatibility with pandas 3.0.
 
 ### Documentation
 1. [#639](https://github.com/influxdata/influxdb-client-python/pull/639): Use Markdown for `README`

diff --git a/influxdb_client/client/write/dataframe_serializer.py b/influxdb_client/client/write/dataframe_serializer.py
@@ -234,7 +234,7 @@ def __init__(self, data_frame, point_settings, precision=DEFAULT_WRITE_PRECISION
 
         for k, v in dict(data_frame.dtypes).items():
             if k in data_frame_tag_columns:
-                data_frame.replace({k: ''}, np.nan, inplace=True)
+                data_frame = data_frame.replace({k: ''}, np.nan)
 
         self.data_frame = data_frame
         self.f = f