Writing Python Variable to Multiple Text Files

Question

The output of the following code is shown in the attached image:

print(reg_num)
print(final_df)

^^^Outputs of print(reg_num)andprint(final_df) as visible on terminal^^^

In the output image, 6 lines of outputs are visible. Pairs of 3 each. I want to save each pair into separate text files.

Expected output:

output1.txt

16SCSE102014
2

output2.txt

16SCSE101350
0

output3.txt

16SCSE101002
0

My attempt:

z = [reg_num, final_df]
print(z)
ctr = 0
for i in z:
  ctr += 1
  with open('d:\\output'+str(ctr)+'.txt', 'w') as f:
     for j in range(len(z)):
     f.write((str(z[j]) + "\n"))

but I couldn't bring the required data into the text files.

What is the solution?

change the line for j in range(len(z)): to for j in i:

astrosyam
– astrosyam

2019-08-06 10:57:12 +00:00
Commented Aug 6, 2019 at 10:57 — astrosyam
– astrosyam, Commented Aug 6, 2019 at 10:57

bruno desthuilliers · Accepted Answer · 2019-08-06 10:53:54Z

1

z = [['2001ABCD2001', '40'],
     ['4002ABCD4002', '30'],
     ['2005WXYZ2005', '20']]

for index, row in enumerate(z, 1):
    dest = "d:\\output{}.txt".format(index)
    with open(dest, 'w') as f:
        f.writelines("{}\n".format(cell) for cell in row)

answered Aug 6, 2019 at 10:53

bruno desthuilliers

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1 Comment

Bonifacio2 Over a year ago

Your answer would be way better if you included some explanation in it.

jofrev · Accepted Answer · 2019-08-06 10:50:19Z

0

This should do the thing. The output files will appear in the same directory you run the python script from.

results = [['2001ABCD2001', '40'],
           ['4002ABCD4002', '30'],
           ['2005WXYZ2005', '20']]

ctr = 0
for res in results:
    ctr += 1
    with open("output{}.txt".format(ctr), 'w') as f:
        f.write("\n".join(res))
        f.write("\n")    # final newline

answered Aug 6, 2019 at 10:50

jofrev

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5 Comments

therion Over a year ago

Its getting the target right, but the text file is being printed character by character in one char per row.

jofrev Over a year ago

That's weird, it doesn't for me and it actually shouldn't for you either. Did you run this exact snippet?

therion Over a year ago

f.write("\n".join(res)) is returning the error - can only join iterables. So I replaced that with str(results) which is a list and hence an iterable. That results in one character per row output to the respective text files. Also it wrote only two files with same data in each instead of three files with respective data.

jofrev Over a year ago

res is an iterable in my snippet since it is a list of strings. So I'm asking again, did you run this exact same snippet as a standalone script or did you merge it into your own code? Which version of Python are you using?

therion Over a year ago

I merged your exact snippet. Using Python 3. Can you just run your code on res = ["16SCSCE2001", "2"] and put it into a text? I'll take it from there.

John B. Walugembe · Accepted Answer · 2019-08-06 10:57:00Z

0

Possibly you could just write the elements of each sub-list:

z = [['2001ABCD2001', '40'],
     ['4002ABCD4002', '30'],
     ['2005WXYZ2005', '20']]

ctr = 0
for i in z:
    ctr += 1
    with open('output'+str(ctr)+'.txt', 'w') as f:
        f.write((i[0] + "\n" + i[1]))

Here the text files are written in the same directory where the python script is run from.

answered Aug 6, 2019 at 10:57

John B. Walugembe

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1 Comment

therion Over a year ago

My question has changed. I think I misunderstood the list in list concept. Please hae a look again.

easycodeeasy · Accepted Answer · 2019-08-06 09:58:35Z

-1

a = ['2001ABCD2001', '40']
b = ['4002ABCD4002', '30']

c = "2005WXYZ2005"        
d = "20"

print(a)
print(b)
print(c)
print(d) # 4 final outputs of the main program to be saved to diff files.

z = [a] # my attempt on just 'a'
ctr = 0
for i in z:
    ctr += 1
    with open('output'+str(ctr)+'.txt', 'w') as f: #ctr to increment name of file
        for j in range(len(a)): 
            f.write((str(a[j])+"\n"))

answered Aug 6, 2019 at 9:58

easycodeeasy

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2 Comments

therion Over a year ago

Hi easycodeyeasy, following your snippet I realized a mistake. So I re-edited my question and included your snippet in it. Could you help me out on this? My question is a lot more closer to what I want to get now.

therion Over a year ago

This needs to create 3 txt files.

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