From afb131637d96e1e5e07eb8abf24e32e7f3b2304d Mon Sep 17 00:00:00 2001 From: Davies Liu Date: Mon, 9 Feb 2015 11:42:52 -0800 Subject: [SPARK-5678] Convert DataFrame to pandas.DataFrame and Series ``` pyspark.sql.DataFrame.to_pandas = to_pandas(self) unbound pyspark.sql.DataFrame method Collect all the rows and return a `pandas.DataFrame`. >>> df.to_pandas() # doctest: +SKIP age name 0 2 Alice 1 5 Bob pyspark.sql.Column.to_pandas = to_pandas(self) unbound pyspark.sql.Column method Return a pandas.Series from the column >>> df.age.to_pandas() # doctest: +SKIP 0 2 1 5 dtype: int64 ``` Not tests by jenkins (they depends on pandas) Author: Davies Liu Closes #4476 from davies/to_pandas and squashes the following commits: 6276fb6 [Davies Liu] Convert DataFrame to pandas.DataFrame and Series --- python/pyspark/sql.py | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) (limited to 'python') diff --git a/python/pyspark/sql.py b/python/pyspark/sql.py index e55f285a77..6a6dfbc585 100644 --- a/python/pyspark/sql.py +++ b/python/pyspark/sql.py @@ -2284,6 +2284,18 @@ class DataFrame(object): """ return self.select('*', col.alias(colName)) + def to_pandas(self): + """ + Collect all the rows and return a `pandas.DataFrame`. + + >>> df.to_pandas() # doctest: +SKIP + age name + 0 2 Alice + 1 5 Bob + """ + import pandas as pd + return pd.DataFrame.from_records(self.collect(), columns=self.columns) + # Having SchemaRDD for backward compatibility (for docs) class SchemaRDD(DataFrame): @@ -2551,6 +2563,19 @@ class Column(DataFrame): jc = self._jc.cast(jdt) return Column(jc, self.sql_ctx) + def to_pandas(self): + """ + Return a pandas.Series from the column + + >>> df.age.to_pandas() # doctest: +SKIP + 0 2 + 1 5 + dtype: int64 + """ + import pandas as pd + data = [c for c, in self.collect()] + return pd.Series(data) + def _aggregate_func(name, doc=""): """ Create a function for aggregator by name""" -- cgit v1.2.3