小编Abh*_*nty的帖子

我有一个numpy2D数组，其形状(4898, )是每行中的元素用分号分隔，但仍存储在单列而不是多列中（期望的结果）。如何在2D数组的每个数组中每次出现分号时创建拆分。我已经编写了以下Python脚本来这样做，但是会引发错误。

stochastic_gradient_descent_winequality.py

import numpy
import pandas

if __name__ == '__main__' :

    with open('winequality-white.csv', 'r') as f_0 :
        with open('winequality-white-updated.csv', 'w') as f_1 :
            f_0.next()
            for line in f_0 :
                f_1.write(line)


    wine_data = pandas.read_csv('winequality-white-updated.csv', sep = ',', header = None)
    wine_data_ = wine_data
    wine_data = numpy.array([x.split(';') for x in wine_data_], dtype = numpy.float)

    print (numpy.shape(wine_data))

失误

Traceback (most recent call last):
  File "stochastic_gradient_descent_winequality.py", line 16, in <module>
    wine_data = numpy.array([x.split(';') for x in wine_data_], …

我是并行编程领域的新手,所以我决定摆弄pthread_join()子程序.我想出了以下代码来计算*X + Y,其中a是标量,X,Y是某种大小的向量.

这是我写的:

    #include <pthread.h>
    #include <math.h>
    #include <stdio.h>
    #include <stdlib.h>
    #define NUM_THREADS 4
    #define VECTOR_SIZE 65

    struct DAXPYdata
    {
      /* data */
      long a;
      long X[VECTOR_SIZE];
      long Y[VECTOR_SIZE];
    };

    struct DAXPYdata daxpystr;
    void *calcDAXPY(void *);

    int main(int argc, char *argv[])
    {
       int vec_index;

       /*Initialize vectors X and Y an scalar a*/
       daxpystr.a = 57;

    for(vec_index = 0 ; vec_index < 65 ; vec_index++){
        daxpystr.X[vec_index] = vec_index + 1;
        daxpystr.Y[vec_index] = vec_index + 2;
    }

    pthread_t call_thread[NUM_THREADS];
    pthread_attr_t attr; …

我试图从文本文件中读取一行,但程序仍然返回一个错误,指出无法找到该文件的名称.关于如何解决问题的任何想法.

源代码:

import java.io.FileReader;
import java.io.BufferedReader;

public class Cipher {

    public String file_name;

    public Cipher(){
        file_name = "/Users/SubrataMohanty/IdeaProjects/CaesarCipher/src/cipher_text.txt";

    }

    public static void main(String[] args) {

        BufferedReader br = null;
        FileReader fr = null;

        Cipher cipher_1 = new Cipher();


        fr = new FileReader(cipher_1.file_name);
        br = new BufferedReader(fr);

        String current_line;

        while ((current_line = br.readLine()) != null){
            System.out.println(current_line);
        }

        }

    }

经过调试,这就是我得到的,

Error:(25, 14) java: unreported exception java.io.FileNotFoundException; must be caught or declared to be thrown
Error:(30, 43) java: unreported exception java.io.IOException; must …