Read multiple CSV using numpy loadtxt and for loop not working

I’m trying to output data in multiple CSV files using a for loop using the following code:

import numpy as np

# read multiple files

def show_datasets(filenames):
    n = len(filenames)
    data=[]
    for i in range(0, n):
        data = np.loadtxt(filenames[i], delimiter=',', dtype=float)
        return data, i

print(show_datasets(['data1.csv', 'data2.csv', 'data3.csv']))

But the it only shows the dataset for the first CSV file and I think the loop ends at i=0 because the return shows the data for data1.csv and then 0 but I don’t get why it doesn’t go through i = 1, i=2 or show the rest of the CSV file data?

What I’m getting:

(array([[ 7.98631, 16.82952, 19.65165],
   [ 7.1446 , 10.41674,  3.81853],
   [ 7.48549, 14.61958,  8.87193],
   [ 8.66521, 14.14244, 10.10248],
   [14.80968, 12.82048, 13.41792]]), 0)

What I want:

(array([[ 7.98631, 16.82952, 19.65165],
   [ 7.1446 , 10.41674,  3.81853],
   [ 7.48549, 14.61958,  8.87193],
   [ 8.66521, 14.14244, 10.10248],
   [14.80968, 12.82048, 13.41792]]), 0)
(array([[ 12.65900,13.22477,8.94481],
   [ 7.11298,1.99820,8.49168],
   [ 0.25181,9.79979,13.62024],
   [ 8.66521, 14.14244, 10.10248],
   [1.98336,1.42358,9.92036]]), 1)
(array([[ 7.98631, 16.82952, 19.65165],
   [ 14.12714,8.03384,15.76423],
   [ 13.78446,8.92194,15.08250],
   [ 15.79836,6.28136,7.43691],
   [17.93699,0.01700,10.15189]]), 2)

>Solution :

• return statement is inside the loop, which causes the function to exit and return the data for the first CSV file in the list.

import numpy as np

def show_datasets(filenames):
    n = len(filenames)
    data = []
    for i in range(n):
        data.append(np.loadtxt(filenames[i], delimiter=',', dtype=float))
    return data

# Pass your datasets as required
print(show_datasets(['data1.csv', 'data2.csv', 'data3.csv']))

• Created an empty list called data to store the loaded datasets and use append method to add each loaded dataset to the data list.
• Move the return statement outside the loop to ensure that all datasets are loaded before returning the final result.