save output values in txt file in columns python

Question

My input value gives corresponding output values as;

my_list = []
for i in range(1,10):
     system = i,i+2*i
     my_list.append(system)
     print(my_list)

[(1, 3)]

[(1, 3), (2, 6)]

[(1, 3), (2, 6), (3, 9)]

[(1, 3), (2, 6), (3, 9), (4, 12)]

I want output stored in 2 columns; where 1,2,3is first column elements and 3,6,9 for 2nd column.

(1 3)
(2 6)
(3 9)

so on... and then write store these values in text file. For text file, is it possible to generate text file as a part of script? Thanks

Skyy · Accepted Answer · 2014-09-22 06:04:29Z

3

file = open('out.txt', 'w')
print >> file, 'Filename:', filename  # or file.write('...\n')
file.close()

Basically, look at the "/n" and add it to variable it should append to the next line also:

use ("a" instead of "w") to keep appending to the file. The file will be in the directory you are building from.

answered Sep 22, 2014 at 6:04

Skyy

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2 Comments

sajid iqbal Over a year ago

with 'system\n' gives me 1 2 3 4 and system system system in 2nd column.

Skyy Over a year ago

try to add a "+" sign inbetween variable and "/n" so: (variable+ '\n')

Kasravnd · Accepted Answer · 2014-09-22 08:27:34Z

2

you need to save the element of my_list that has equal index with i-1 (your range began at 1):

my_list=[] 
with open ('new.txt','w') as f:
 for i in range(1,10):
     system = i,i+2*i
     my_list.append(system)
     print(my_list)
     f.write(str(my_list[i-1])+'\n')

output:

(1, 3)
(2, 6)
(3, 9)
(4, 12)
(5, 15)
(6, 18)
(7, 21)
(8, 24)
(9, 27)

also as says in comments you don't need my_list you can do it with following code :

with open ('new.txt','w') as f:
 for i in range(1,10):
     system = i,i+2*i
     f.write(str(system)+'\n')

edited Sep 22, 2014 at 8:27

answered Sep 22, 2014 at 6:09

Kasravnd

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4 Comments

sajid iqbal Over a year ago

thanks. this saves only one value in out_put file as [(9, 27)].

sajid iqbal Over a year ago

thanks it works! i was editing my own script. thanks

Kasravnd Over a year ago

welcome , so if you fide your answer , you can tell to community with [accepting an answer][1] [1][meta.stackexchange.com/questions/5234/…

PM 2Ring Over a year ago

@Kasra : Why not f.write(str(system) + '\n') instead of f.write(str(my_list[i-1])+'\n') ?

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