Writing a list of a list in a text file-CodePudding

I am trying to write a list of list to a text file but I am getting the following error:

Traceback (most recent call last):

 File "D:......", line 26, in <module>
file.write(items)
TypeError: write() argument must be str, not list

The code:

coordinates = []
for i, j in zip(x, y):
  coordinates.append([i,j])

file = open('coordinates.txt', 'w')
for items in coordinates:
  file.write(items)

The list: [[0, 17], [1, 5], [2, 12], [3, 9], [4, 7], [5, 7], [6, 4], [7, 6], [8, 6], [9, 16]]

If anyone would help me with this it would be much appreciated.

CodePudding user response：

Assuming your data will not be tampered with, you can do str(coordinates) and write it. Also Remember, to close it.

To retrieve it, do this

from ast import literal_eval
with f as open('coordinates.txt'):
    coordinates = literal_eval(f.read())

CodePudding user response：

This is the solution I found after following a previous comment by Fishball Noodles:

coordinates = []
for i, j in zip(x, y):
 coordinates.append((i,j))

file = open('coordinates.txt', 'w')
for items in coordinates:
 line = ' '.join(str(x) for x in items)
 file.write(line   '\n')