How to import a csv-file into a data array?

You can use pandas library or numpy to read the CSV file. If your file is tab-separated then use '\t' in place of comma in both sep and delimiter arguments below.

import pandas as pd 
myFile = pd.read_csv('filepath', sep=',')

Or

 import numpy as np
 myFile = np.genfromtxt('filepath', delimiter=',')

I think the simplest way to do this is via Pandas:

import pandas as pd
data = pd.read_csv(FILE).values

This returns a Numpy array of values from a DataFrame created from the CSV. See the documentation here.

Assuming the CSV file is delimited with commas, the simplest way using the csv module in Python 3 would probably be:

import csv

with open('testfile.csv', newline='') as csvfile:
    data = list(csv.reader(csvfile))

print(data)

You can specify other delimiters, such as tab characters, by specifying them when creating the csv.reader:

    data = list(csv.reader(csvfile, delimiter='\t'))

For Python 2, use open('testfile.csv', 'rb') to open the file.