CODEWITHSUNDEEP
pythonpython-3.x
derpyherp
derpyherp

Reputation: 525

Python write to file in list format

I am trying to write a program that will write a list of info in a text file. Here's an example of what I have so far

f.open('blah.txt','w')
x = input('put something here')
y = input('put something here')
z = input('put something here')
info = [x,y,z]
a = info[0]
b = info[1]
c = info[2]
f.write(a)
f.write(b)
f.write(c)
f.close()

However i need it to write it in a list-like format so that if I input

x = 1 y = 2 z = 3

then the file will read 

1,2,3

and so that the next time I input info it will write it in a newline like

1,2,3
4,5,6

How can I fix this?

Upvotes: 0

Views: 1912

Answers (3)

hdante
hdante

Reputation: 8040

Use a complete, ready to use, serialization format. For example:

import json
x = ['a', 'b', 'c']
with open('/tmp/1', 'w') as f:
    json.dump(x, f)

File contents:

["a", "b", "c"]

Upvotes: 1

Nik
Nik

Reputation: 5755

Try this:

f.open('blah.txt','a') # append mode, if you want to re-write to the same file
x = input('put something here')
y = input('put something here')
z = input('put something here')
f.write('%d,%d,%d\n' %(x,y,z))
f.close()

Upvotes: 1

Lev Levitsky
Lev Levitsky

Reputation: 65861

Format a string and write it:

s = ','.join(info)
f.write(s + '\n')

Upvotes: 2

Related Questions