读取 CSV 文件的数据以创建新的 CSV 文件

Question

I have some data on a CSV file. As you can see in the code, I can read the file and print the info I need. The problem is when I try to create a new CSV file with some info of Original CSV file. I would like to save my analyzed info in a new CSV. I don't know how to use the original info to make a new file.

Data.csv enter image description here

import csv

with open('Data.csv') as csvfile:
    readCSV = csv.reader(csvfile, delimiter=',')
    for row in readCSV:
        analyzed = (row[0],row[3],row[3]<0.25)
        print(analyzed)

Answer 1

You probably want to use pandas when it comes to CSV files or table-like data:

import pandas as pd

df_data = pd.DataFrame.from_csv('Data.csv')

# Analyze
for index, row in df_data.iterrows():
    pass

df_data.to_csv('new_Data.csv')

For reading you have several options like

• pandas.DataFrame.from_csv
• pandas.read_csv
• pandas.read_table

and, as you see, use

• pandas.DataFrame.to_csv

to save your transformed or newly created DataFrame .

For installation run

pip install pandas