Import csv file into a matrix/Array in Python

Question

I am trying to import big csv files which contain both string and numeric matrix of data into Arrays/matrices in Python. In MATLAB I used to load the file and simply assign

Answer 1

You can use pandas.

import pandas as pd
df = pd.from_csv('filename.csv')

If the delimiter is not ',' you can change the default value by using the sep keyword, for example:

df = pd.from_csv('filename.csv', sep='\')

You will get a dataframe that comes with powerful analysis functions.

Answer 2

You can use the built-in csv module to load your data to a multidimensional list:

import csv

with open('data.csv', 'rb') as f:
    reader = csv.reader(f)
    data_as_list = list(reader)

print data_as_list
# [['data1', 1],
#  ['data2', 2],
#  ['data3', 3]]

Answer 3

import numpy as np
with open("your_file.csv",'r')as f :
    data_list = list(csv.reader(f, delimiter=";"))
data_array=np.array(data_list[1:])