How to write variable and array on the same line for a text file?

Question

I have an array called 'thelist' and it holds some numbers which I want to output to a file on the same line delimited with commas. I did this using:

thelist = [1,6,5,2,7]

thefile = open('test.txt', 'w')

name = "bob"

for item in thelist:
  thefile.write("%s,"%(item))

output:

1,6,5,2,7,

However, I want to be able to write the name and the array on the same line. So it'd look something similar to bob 1,6,5,2,7

I tried to use thefile.write("%s %s,"%(name,item)) but that unfortunately does not work. I tried to search for an answer but I didn't find a solution. Any ideas? Is this even possible?

gt6989b · Accepted Answer · 2015-12-21 20:29:08Z

1

precede the for-loop by thefile.write("%s ", name)

Your lat lines would look like this:

thefile.write("%s " % name)
for item in thelist:
  thefile.write("%s,"% item)

In addition, to remove the annoying comma at the end, you can consider

outStr = ",".join(map(str, thelist))
thefile.write("%s %s" %(name, outStr))

edited Dec 21, 2015 at 20:29

answered Dec 21, 2015 at 20:08

gt6989b

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1 Comment

Gabriel A. Over a year ago

Your solution gave me a TypeError: write() takes exactly 2 positional arguments (3 given) error which I managed to fix by doing thefile.write("%s " %name) and thefile.write("%s,"% item). This gave me bob 1,6,5,2,7 which also removed the comma at the end without me adding the extra code.

Diogo Martins · Accepted Answer · 2015-12-21 20:17:09Z

0

thefile.write("{n} {l}".format(n=name, l=",".join(str(i) for i in theList)))

answered Dec 21, 2015 at 20:17

Diogo Martins

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