I've just started a Python Scripting tutorial on QGIS. The problem arrives right at the end, when I have to use this script:

output_file = open('c:/Users/Ujaval/Desktop/airports.txt', 'w')
for f in layer.getFeatures():
  geom = f.geometry()
  line = '%s, %s, %f, %f\n' % (f['name'], f['iata_code'],
          geom.asPoint().y(), geom.asPoint().x())
  unicode_line = line.encode('utf-8')

Please note that the PATH used is another one, and that's my big problem as I tried several alternatives on how to write it, examples:

output_file = open('D:\ne_10m_airports', 'w')
IOError: [Errno 22] invalid mode ('w') or filename: 'D:\ne_10m_airports'

output_file = open('C://Users//Florin//Desktop//ne_10m_airports', 'w')
IOError: [Errno 13] Permission denied: 'C://Users//Florin//Desktop//ne_10m_airports'

output_file = open('C:/Users/Florin/Desktop/ne_10m_airports', 'w')

output_file = open('C:\Users\Florin\Desktop\ne_10m_airports', 'w')

I can't really seem to figure out why it's being denied permission. In any case, the error is either: permission denied, invalid mode or filename. (Tried it with double quotes as well).

  • 1
    I can see why it didn't worked...I didn't typed .txt file type. What a terrible mistake. No wonder it didn't work, however as I changed to Linux it could still be something else.
    – Geosphere
    May 21, 2015 at 10:16
  • The error is telling you the problem, "invalid mode or filename". docs.python.org/2/tutorial/…
    – Matt
    May 21, 2015 at 10:43

1 Answer 1



'D:\ne_10m_airports' as 'D:/ne_10m_airports' 

(change with uri formalism) or


(escaping) or


(r means raw string)


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