python - PySpark: "Exception: Java gateway process exited before ...
I'm trying to run PySpark on my MacBook Air. When I try starting it up, I get the error: Exception: Java gateway process exited before sending the driver its port number when sc = SparkContext() is
PySpark: multiple conditions in when clause - Stack Overflow
Jun 8, 2016 · Very helpful observation when in pyspark multiple conditions can be built using & (for and) and | (for or). Note:In pyspark t is important to enclose every expressions within parenthesis () that …
pyspark - How to use AND or OR condition in when in Spark - Stack …
107 pyspark.sql.functions.when takes a Boolean Column as its condition. When using PySpark, it's often useful to think "Column Expression" when you read "Column". Logical operations on PySpark …
Comparison operator in PySpark (not equal/ !=) - Stack Overflow
Aug 24, 2016 · The selected correct answer does not address the question, and the other answers are all wrong for pyspark. There is no "!=" operator equivalent in pyspark for this solution.
python - Spark Equivalent of IF Then ELSE - Stack Overflow
python apache-spark pyspark apache-spark-sql edited Dec 10, 2017 at 1:43 Community Bot 1 1
Rename more than one column using withColumnRenamed
Since pyspark 3.4.0, you can use the withColumnsRenamed() method to rename multiple columns at once. It takes as an input a map of existing column names and the corresponding desired column …
python - Concatenate two PySpark dataframes - Stack Overflow
May 20, 2016 · Utilize simple unionByName method in pyspark, which concats 2 dataframes along axis 0 as done by pandas concat method. Now suppose you have df1 with columns id, uniform, normal …
spark.read.json throws COLUMN_ALREADY_EXISTS, column names …
pyspark.errors.exceptions.captured.AnalysisException: [COLUMN_ALREADY_EXISTS] The column `supportedldapversion` already exists. Consider to choose another name or rename the existing …
How to change dataframe column names in PySpark?
I come from pandas background and am used to reading data from CSV files into a dataframe and then simply changing the column names to something useful using the simple command: df.columns =
Pyspark dataframe LIKE operator - Stack Overflow
Oct 24, 2016 · What is the equivalent in Pyspark for LIKE operator? For example I would like to do: SELECT * FROM table WHERE column LIKE "*somestring*"; looking for something easy like this …