file-processing

问题 I am trying to append the name of a folder to all filenames within that folder. I have to loop through a parent folder that contain sub folders. I have to do this in Python and not a bat file. Example is, take these folders: Parent Folder Sub1 example01.txt example01.jpg example01.tif Sub2 example01.txt example01.jpg example01.tif To this Parent Folder Sub1 Sub1_example01.txt Sub1_example01.jpg Sub1_example01.tif Sub2 Sub2_example01.txt Sub2_example01.jpg Sub2_example01.tif I believe its os

问题 I have two different files, one delimited by pipe separator "|" and one by comma ",". I am using Spring Batch to process these files using FlatFileItemReader. I dont want to have two readers and two writers for the files. Can I have somehow one generic FlatFileItemReader for both files? Also the objects to which the files will be mapped are different. 回答1: You can inject a DelimitedLineTokenizer and you can set the delimiter as per requirement. you can make it generic using

来源： https://stackoverflow.com/questions/64220034/splitting-a-warc-file-into-chunks-based-on-the-header-warc-1-0-python

来源： https://stackoverflow.com/questions/64220034/splitting-a-warc-file-into-chunks-based-on-the-header-warc-1-0-python

来源： https://stackoverflow.com/questions/64220034/splitting-a-warc-file-into-chunks-based-on-the-header-warc-1-0-python

来源： https://stackoverflow.com/questions/5008845/skipping-lines-using-file-get-contents

来源： https://stackoverflow.com/questions/5008845/skipping-lines-using-file-get-contents

问题 I feel embarrassed to ask this question as I feel like I should already know. However, given I don't....I want to know how to read large files from disk to a database without getting an OutOfMemory exception. Specifically, I need to load CSV (or really tab delimited files). I am experimenting with CSVReader and specifically this code sample but I'm sure I'm doing it wrong. Some of their other coding samples show how you can read streaming files of any size, which is pretty much what I want

问题 I have implemented codes in MATLAB that operates on 216x216 matrices that contain numeric data and sometime strings. The operations that I do on these matrices are mostly like filter matrices above a certain threshold, find all the matrix indexes that are above some value, Find a list of values above say X and then find consecutive differences between them, some string replace manipulations. Do matrix dot products etc. I need to access thousands of files to generate these matrices(dlmread I

问题 I have implemented codes in MATLAB that operates on 216x216 matrices that contain numeric data and sometime strings. The operations that I do on these matrices are mostly like filter matrices above a certain threshold, find all the matrix indexes that are above some value, Find a list of values above say X and then find consecutive differences between them, some string replace manipulations. Do matrix dot products etc. I need to access thousands of files to generate these matrices(dlmread I