spark = SparkSession.builder.appName("Array to Columns").getOrCreate() 创建示例数据集: 代码语言:txt 复制 data = [(1, ["A", "B", "C"]), (2, ["D", "E"]), (3, ["F"])] df = spark.createDataFrame(data, ["id", "my_array"]) df.show() 输出结果: 代码语言:txt 复制 ...
Generalized to support an arbitrary number of columns: # This uses keyword only arguments # If you use legacy Python you'll have to change signature # Body of the function can stay the same def zip_and_explode(*colnames, n): return explode(array(*[ struct(*[col(c).getItem(i).alias(c...
接下来,假设我们有一个名为"array_col"的数组类型列,我们可以使用explode函数将其拆分成多列。explode函数将数组中的每个元素拆分成一行,并将其与原始行的其他列一起展示。 代码语言:txt 复制 df = df.withColumn("exploded_col", explode(col("array_col"))) ...
从data结构体中提取相关列，然后使用inline onspecificationscolumn将一个结构体数组分解为一个表，然后透视...
2 spark extract columns from string 1 PySpark get related records from its array object values Related 1 Transpose rows to Columns in Spark SQL (pyspark) 3 Transpose rows to columns in pyspark 1 Transpose specific columns to rows using python pyspark 1 Pyspark transform key-value pairs ...
* @param pivotColumn Name of the column to pivot. * @param values List of values that will be translated to columns in the output DataFrame. * @since 1.6.0 */ 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. ...
to driver节点（首先，采取，收集等），是如果你知道columns you need或者max size of each array ...
df=pd.DataFrame(np.random.rand(5,5),columns=[‘a’,‘b’,‘c’,‘d’,‘e’]). applymap(lambda x: int(x*10)) file=r"D:\hadoop_spark\spark-2.1.0-bin-hadoop2.7\examples\src\main\resources\random.csv" df.to_csv(file,index=False) 再读取csv文件 monthlySales = spark.read.csv(fil...
pyspark.sql.functions. array_min (col) #计算指定列的最小值 pyspark.sql.functions. array_max (col) #计算指定列的最大值 pyspark.sql.functions.stddev(col) #返回组中表达式的无偏样本标准差 pyspark.sql.functions.sumDistinct(col) #返回表达式中不同值的总和 ...
(data=np.array([[1,2,3,4,5],[6,7,8,9,0]]),columns=['a','b','c','d','e'])#元素应用函数,python函数,需要提供返回值的数据类型, apply|transform|aggdefsquare(x)->np.int64:returnx**2pss.apply(square)defsubtract_custom_value(x,custom_value)->np.int64:returnx-custom_valuepss...