How can I save a list of numpy arrays to a column of an existing csv file?

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I have csv file structured like this :

CSV

header1,header2,header3,header4
value11,value21,value31
value12,value22,value32

I want to save my_list which contains multiple (numpy arrays) in column header4:

Python

my_list=[array([1,2,0,1,2.....]),array([1,2,0,1,2.....]),array([1,2,0,1,2.....])]

How can I do this?

What I have tried:

Python

data=pd.read_csv('test.csv',error_bad_lines=False)
my_list=[(array[1,2,0,1,2.....]),array([1,2,0,1,2.....]),array([1,2,0,1,2.....])]
data['header4']=my_list
data.to_csv('test.csv', index=False)

Posted 20-Sep-21 9:40am

laila alaoui

Updated 20-Sep-21 22:07pm

Richard Deeming

v3

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Comments

Richard MacCutchan 21-Sep-21 4:39am

What is the problem?

laila alaoui 22-Sep-21 10:00am

the problem is : I do not find all the values of array in the file ,just: array ([0 1 2 ... 2 0 1]),the others are replaced by dots.

Richard MacCutchan 22-Sep-21 10:34am

Sorry, but it is impossible to guess what your code is doing or what happens when it runs. Where is all this data coming from that you use to create my_list? You need to provide far more details if you want anyone here to be able to help you.

laila alaoui 22-Sep-21 11:23am

import numpy as np
from numpy import array
from numpy import argmax
a="ATCGTCGTACGTCAGCAACCACACGTCAGCAGCAGCAGTGTGGTGTGGTCACCCAGTGTGCACCACCACCACCACACCACACCATCGTCGTACGTCAGCAACCACACGTCAGCAGCAGCAGTGTGGTGTGGTCACCCAGTGTGCACCACCACCACCACACCACACCATCGTCGTACGTCAGCAACCACACGTCAGCAGCAGCAGTGTGGTGTGGTCACCCAGTGTGCACCACCACCACCACACCACACCATCGTCGTACGTCAGCAACCACACGTCAGCAGCAGCAGTGTGGTGTGGTCACCCAGTGTGCACCACCACCACCACACCACACCATCGTCGTACGTCAGCAACCACACGTCAGCAGCAGCAGTGTGGTGTGGTCACCCAGTGTGCACCACCACCACCACACCACACCATCGTCGTACGTCAGCAACCACACGTCAGCAGCAGCAGTGTGGTGTGGTCACCCAGTGTGCACCACCACCACCACACCACACCATCGTCGTACGTCAGCAACCACACGTCAGCAGCAGCAGTGTGGTGTGGTCACCCAGTGTGCACCACCACCACCACACCACACCATCGTCGTACGTCAGCAACCACACGTCAGCAGCAGCAGTGTGGTGTGGTCACCCAGTGTGCACCACCACCACCACACCACACCATCGTCGTACGTCAGCAACCACACGTCAGCAGCAGCAGTGTGGTGTGGTCACCCAGTGTGCACCACCACCACCACACCACACCATCGTCGTACGTCAGCAACCACACGTCAGCAGCAGCAGTGTGGTGTGGTCACCCAGTGTGCACCACCACCACCACACCACACCATCGTCGTACGTCAGCAACCACACGTCAGCAGCAGCAGTGTGGTGTGGTCACCCAGTGTGCACCACCACCACCACACCACACCATCGTCGTACGTCAGCAACCACACGTCAGCAGCAGCAGTGTGGTGTGGTCACCCAGTGTGCACCACCACCACCACACCACACCATCGTCGTACGTCAGCAACCACACGTCAGCAGCAGCAGTGTGGTGTGGTCACCCAGTGTGCACCACCACCACCACACCACACCATCGTCGTACGTCAGCAACCACACGTCAGCAGCAGCAGTGTGGTGTGGTCACCCAGTGTGCACCACCACCACCACACCACACCATCGTCGTACGTCAGCAACCACACGTCAGCAGCAGCAGTGTGGTGTGGTCACCCAGTGTGCACCACCACCACCACACCACACCvvvvATCGTCGTACGTCAGCAACCACACGTCAGCAGCAGCAGTGTGGTGTGGTCACCCAGTGTGCACCACCACCACCACACCACACCATCGTCGTACGTCAGCAACCACACGTCAGCAGCAGCAGTGTGGTGTGGTCACCCAGTGTGCACCACCACCACCACACCACACCATCGTCGTACGTCAGCAACCACACGTCAGCAGCAGCAGTGTGGTGTGGTCACCCAGTGTGCACCACCACCACCACACCACACCATCGTCGTACGTCAGCAACCACACGTCAGCAGCAGCAGTGTGGTGTGGTCACCCAGTGTGCACCACCACCACCACACCACACCATCGTCGTACGTCAGCAACCACACGTCAGCAGCAGCAGTGTGGTGTGGTCACCCAGTGTGCACCACCACCACCACACCACACCATCGTCGTACGTCAGCAACCACACGTCAGCAGCAGCAGTGTGGTGTGGTCACCCAGTGTGCACCACCACCACCACACCACACCATCGTCGTACGTCAGCAACCACACGTCAGCAGCAGCAGTGTGGTGTGGTCACCCAGTGTGCACCACCACCACCACACCACACCATCGTCGTACGTCAGCAACCACACGTCAGCAGCAGCAGTGTGGTGTGGTCACCCAGTGTGCACCACCACCACCACACCACACCATCGTCGTACGTCAGCAACCACACGTCAGCAGCAGCAGTGTGGTGTGGTCACCCAGTGTGCACCACCACCACCACACCACACC"
a=array(list(a))
file=open("/home/motassim/Documents/test.txt",'w')
file.writelines(str(a))
file.close()

the problem is: I find in the file (test.txt) just:[0, 3, 1, ..., 0, 1, 1]. I do not find all values.

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