Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/18378#discussion_r123499500
--- Diff: python/pyspark/sql/dataframe.py ---
@@ -1721,7 +1721,18 @@ def toPandas(self):
1 5 Bob
"""
import pandas as pd
- return pd.DataFrame.from_records(self.collect(),
columns=self.columns)
+
+ dtype = {}
+ for field in self.schema:
+ pandas_type = _to_corrected_pandas_type(field.dataType)
+ if pandas_type is not None:
+ dtype[field.name] = pandas_type
+
+ pdf = pd.DataFrame.from_records(self.collect(),
columns=self.columns)
+
+ for f, t in dtype.items():
+ pdf[f] = pdf[f].astype(t, copy=False)
--- End diff --
thanks for the investigation! maybe we should specify the version
requirement for pandas
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