在 python 中打印 csv 文件

Question

Data

Data - [DataFrame][1]

Hello there. I am a little newbie in python. I need to edit the dataset in the picture. But since there are 22 million lines and it is forcing my computer, I wanted to ask you before I tried it. I want to print XYZ- "class" - "tahmin" columns from this data set (.csv file) to a new ".csv" file. Can you help with this?

I wish you healthy days:)

Answer 1

I don't know what is in your.csv file, but according to this documentaion , something like this should works:

import csv
with open('file.csv', 'r') as csvfile:
    with open('newfile.csv', 'w') as newfile:
        data = csv.reader(csvfile)
        writer = csv.writer(newfile)
        writer.writerow(["X", "Y", "Z", "class", "tahmin"])
        for row in data:
            writer.writerow(row)

Answer 2

you should share some code i think, not all 22 million lines of course, but enough for us to know what we're working.

In the meantime, please refer to this page explaining everything you need on reading/writing from cvs files in python.

just to clarify, the page is from the official python documentation website. Goodluck.

Answer 3

use pandas https://pandas.pydata.org/

import pandas as pd 
dataset = pd.read_csv('file.csv')
dataset = dataset[['X','Y','Z', 'class' , 'tahmin']]
dataset.to_csv('newFile.csv')