Shulou(Shulou.com)06/01 Report--

Today, I will talk to you about the SDK protocol EasyCVR how to read the contents of csv files through the Go language, which may not be well understood by many people. In order to make you understand better, the editor summarized the following contents for you. I hope you can get something according to this article.

EasyCVR is a video intelligent security monitoring platform developed by TSINGSEE, which supports secondary development by calling API interface, as well as the development of other customized functions. In some customized projects of EasyCVR, you need to import csv files to generate corresponding video upload plans, so you need to read the contents of csv files.

General csv files are similar to excel files in that they are not data made up of tables. Compared with excel files, the format of csv files is simpler, as long as each data is separated by ",", the data before and after the comma is the data of two tables. The display is as follows:

The code file that the actual Go language reads to the csv file at one time is:

/ / read all data at once func ReadCsvFileAll (fileName string) ([] [] string, error) {/ / for small files, read all contents at once fs, err: = os.Open (fileName) if err! = nil {return nil, err} defer fs.Close () R1: = csv.NewReader (fs) return r1.ReadAll ()}

The above code is suitable for reading small csv files, for some csv files can even reach hundreds of thousands of data, read all at once, will lead to a large amount of memory space, not suitable for one-time reading, so it needs to read line by line. The code is as follows:

/ / read every line of csv file func ReadCsvLine (fileName string) {fs, err: = os.Open (fileName) if err! = nil {fmt.Println ("readError", err)} defer fs.Close () r: = csv.NewReader (fs) / / for large files Read the file for {row, err: = r.Read () if err! = nil & & err! = io.EOF {fmt.Println ("readError", err)} if err = = io.EOF {break} fmt.Println (row)}

The GO language has always been popular with many people because it is concise and easy to learn. At the same time, the friendly tool chain of the Go language also makes programming easier.

After reading the above, do you have any further understanding of how the SDK protocol EasyCVR reads the contents of csv files through Go language? If you want to know more knowledge or related content, please follow the industry information channel, thank you for your support.

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.