split

问题 Data: import pandas as pd data = pd.DataFrame({'classes':[1,1,1,2,2,2,2],'b':[3,4,5,6,7,8,9], 'c':[10,11,12,13,14,15,16]}) My code: import numpy as np from sklearn.cross_validation import train_test_split X = np.array(data[['b','c']]) y = np.array(data['classes']) X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=4) Question: train_test_split will randomly choose test set from all the classes. Is there any way to have the same number of test set for each class ? (For example

问题 I have a large dataset in JSON format, for ease of use, I want to split it into multiple json files while still maintaining the structure. For ex: { "{"users": [ { "userId": 1, "firstName": "Krish", "lastName": "Lee", "phoneNumber": "123456", "emailAddress": "krish.lee@learningcontainer.com" }, { "userId": 2, "firstName": "racks", "lastName": "jacson", "phoneNumber": "123456", "emailAddress": "racks.jacson@learningcontainer.com" }, { "userId": 3, "firstName": "denial", "lastName": "roast",

问题 i have a text file called builders.txt that contains some data Reliable Rover:70:1. Sloppy Simon:20:4. Technical Tom:90:3. Within my main file i have a function declaration related to this specific text file void Builder() { std:string name; int ability; int variability; } this is my read file function std::vector<std::string> lines; std::string inputFile1 = "Builders.txt"; std::string inputFile2 = "Parts.txt"; std::string inputFile3 = "Customers.txt"; std::string outputFile = "output.txt";

问题 input data in a file given below 1985,Adv,Blue 1985,Adv,gill 1985,Adv,mon 1985,Cal,20 1985,Cal,25 1985,Cape,Din 1966,Ray,One 1966,Ray,bel 1966,Ray,Reb 1966,Sum,37 1966,Tar,Black 1966,Tar,Watch 1967,Yachts,Nut 1967,Yachts,Shark 1967,Cal,20 1967,Cal,25 1967,Cal,28 Expected output as a json file with formatted data like { "1985" : { "Adv" : ["Blue", "gill", "mon"], "Cal" : ["20", "25"], "Cape" : ["Din"] }, "1966" : { "Ray" : ["One", "bel", "Reb"], "Sum" : ["37"], "Tar" : ["Black", "Watch"] },

问题 A php variable contains $string = "256 Engineering Maths-I 21 -1 21 F"; printing $string gives output 256 Engineering Maths-I 21 -1 21 F this variable should split in to $n[0] = "256"; $n[1] = "Engineering Maths-I"; $n[2] = "21"; $n[3] = "-1"; $n[4] = "21"; $n[5] = "F"; I have tried with $n = explode(" ", $string); but it is splitting in to 2 parts Please help me 回答1: What you are probably looking at is a tab separated string Do this $n = explode("\t", $string); UPDATE The answer was that the

问题 I have a long character that comes from a pdf extraction. Below is a MWE : MWE <- "4 BLABLA\r\n Table 1. Real GDP\r\n Percentage changes\r\n 2016 2017 \r\nArgentina -2.5 2.7\r\nAustralia 2.6 2.5\r\n BLABLA \r\n Table 2. Nominal GDP\r\n Percentage changes\r\n 2011 2012\r\nArgentina 31.1 21.1\r\nAustralia 7.7 3.3\r\n" I want to separate this into a list, with each element being a table. I can do that with : MWE_1 <- as.list(strsplit(MWE, "(?<=[Table\\s+\\d+\\.\\s+(([A-z]|[ \t]))+\\r\\n])")) >

问题 I have this piece of code which is intended to split strings into an array of strings using CHUNK_SIZE as the size of the split, in bytes (I'm doing this for paginating results). This works in most cases when characters are 1 byte, but when I have a multi-byte character (such as for example 2-byte french characters (like é) or 4 byte chinese characters) at precisely the split location, I end up with 2 unreadable characters at the end of my first array element and at the start of the second

问题 I have this piece of code which is intended to split strings into an array of strings using CHUNK_SIZE as the size of the split, in bytes (I'm doing this for paginating results). This works in most cases when characters are 1 byte, but when I have a multi-byte character (such as for example 2-byte french characters (like é) or 4 byte chinese characters) at precisely the split location, I end up with 2 unreadable characters at the end of my first array element and at the start of the second

问题 I want to split a given sentence of type string into words and I also want punctuation to be added to the list. For example, if the sentence is: "Sara's dog 'bit' the neighbor." I want the output to be: [Sara's, dog, ', bit, ', the, neighbour, .] With string.split(" ") I can split the sentence in words by space, but I want the punctuation also to be in the result list. String text="Sara's dog 'bit' the neighbor." String list = text.split(" ") the printed result is [Sara's, dog,'bit', the,

问题 For downloading German bank holidays via a web api and converting the json data into a pandas dataframe I use the following code (python 3): import datetime import requests import pandas as pd now = datetime.datetime.now() year = now.year URL ='https://feiertage-api.de/api/?jahr='+ str(year) r = requests.get(URL) df = pd.DataFrame(r.json()) The goal is a pandas dataframe looking like (picture = section of the dataframe): The Problem: "columns" are pandas.core.series.Series and I cannot figure