loops

问题 I am trying to apply a filter on several columns on an rdd. I want to pass in a list of indices as a parameter to specify which ones to filter on, but pyspark only applies the last filter. I've broken down the code into some simple test cases and tried the non-looped version and they work. test_input = [('0', '00'), ('1', '1'), ('', '22'), ('', '3')] rdd = sc.parallelize(test_input, 1) # Index 0 needs to be longer than length 0 # Index 1 needs to be longer than length 1 for i in [0,1]: rdd =

问题 I am trying to apply a filter on several columns on an rdd. I want to pass in a list of indices as a parameter to specify which ones to filter on, but pyspark only applies the last filter. I've broken down the code into some simple test cases and tried the non-looped version and they work. test_input = [('0', '00'), ('1', '1'), ('', '22'), ('', '3')] rdd = sc.parallelize(test_input, 1) # Index 0 needs to be longer than length 0 # Index 1 needs to be longer than length 1 for i in [0,1]: rdd =

问题 I need to deploy a list of GCP compute instances. How do I loop for_each through the "vms" in a list of objects like this: "gcp_zone": "us-central1-a", "image_name": "centos-cloud/centos-7", "vms": [ { "hostname": "test1-srfe", "cpu": 1, "ram": 4, "hdd": 15, "log_drive": 300, "template": "Template-New", "service_types": [ "sql", "db01", "db02" ] }, { "hostname": "test1-second", "cpu": 1, "ram": 4, "hdd": 15, "template": "APPs-Template", "service_types": [ "configs" ] } ] } 回答1: Seem's like I

问题 I am trying to turn a Map("a" -> 2, "b" -> 1) into seq("a","a","b") through the map function, Currently I am trying to run the code below giving me the desired result. Is there a smarter way to do this? Possibly a better way through the map function? var multiset : Seq[T] = Seq[T]() var variables : Seq[T] = data.map(x => x._1).toSeq var variableCounts : Seq[Int] = data.map(x => x._2).toSeq for(x <- 0 until variables.length){ for(y <- 0 until variableCounts(x)) multiset = multiset :+ variables

问题 I am trying to turn a Map("a" -> 2, "b" -> 1) into seq("a","a","b") through the map function, Currently I am trying to run the code below giving me the desired result. Is there a smarter way to do this? Possibly a better way through the map function? var multiset : Seq[T] = Seq[T]() var variables : Seq[T] = data.map(x => x._1).toSeq var variableCounts : Seq[Int] = data.map(x => x._2).toSeq for(x <- 0 until variables.length){ for(y <- 0 until variableCounts(x)) multiset = multiset :+ variables

问题 I am trying to turn a Map("a" -> 2, "b" -> 1) into seq("a","a","b") through the map function, Currently I am trying to run the code below giving me the desired result. Is there a smarter way to do this? Possibly a better way through the map function? var multiset : Seq[T] = Seq[T]() var variables : Seq[T] = data.map(x => x._1).toSeq var variableCounts : Seq[Int] = data.map(x => x._2).toSeq for(x <- 0 until variables.length){ for(y <- 0 until variableCounts(x)) multiset = multiset :+ variables

问题 If I run the following code, it will print out 3 times duplicate, but when I remove the if statement inside the while loop (just to see how many times it will iterate) it starts an infinite loop. How does actually this hasNext() method working? I thought that will iterate only 5 times as I have 5 items in the list. public class ExerciseOne { public static void main(String []args){ String []colors = {"MAGENTA","RED","WHITE","BLUE","CYAN"}; List<String> list = new ArrayList<String>(); for

问题 If I run the following code, it will print out 3 times duplicate, but when I remove the if statement inside the while loop (just to see how many times it will iterate) it starts an infinite loop. How does actually this hasNext() method working? I thought that will iterate only 5 times as I have 5 items in the list. public class ExerciseOne { public static void main(String []args){ String []colors = {"MAGENTA","RED","WHITE","BLUE","CYAN"}; List<String> list = new ArrayList<String>(); for

问题 If I run the following code, it will print out 3 times duplicate, but when I remove the if statement inside the while loop (just to see how many times it will iterate) it starts an infinite loop. How does actually this hasNext() method working? I thought that will iterate only 5 times as I have 5 items in the list. public class ExerciseOne { public static void main(String []args){ String []colors = {"MAGENTA","RED","WHITE","BLUE","CYAN"}; List<String> list = new ArrayList<String>(); for

问题 I want to be able to have two while True loops running at the same time. Would this be possible? I am extremely new to Python, so I do not know how to get round this problem. This is the code I made: import time def infiniteLoop(): while True: print('Loop 1') time.sleep(1) infiniteLoop() while True: print('Loop 2') time.sleep(1) Right now, it just prints a 'Loop 1' Thanks in advance 回答1: To run both loops at once, you either need to use two threads or interleave the loops together. Method 1: