如何将数据框导入 Pandas 数据框并将其转换为字典?
我有从 Spark 创建的这个数据框,
sc = SparkContext(appName="PythonSQL")
sqlContext = SQLContext(sc)
path = os.path.join(os.environ['SPARK_HOME'], "examples/src/main/resources/people.json")
# Create the DataFrame
df = sqlContext.read.json(path)
# Register this DataFrame as a table.
df.registerTempTable("people")
# SQL statements can be run by using the sql methods provided by sqlContext
teenagers = sqlContext.sql("SELECT name FROM people")
sc.stop()
当我尝试将其导入熊猫时,
teenagers = pd.DataFrame(teenagers, columns=['name'])
我得到这个错误,
[client 127.0.0.1:50885] PandasError:DataFrame 构造函数未正确调用!
毕竟,我只是想将数据框转换成字典,
dict = teenagers.set_index('name').to_dict()
print dict
有任何想法吗?