Reputation: 323
hi i'm working in an app which generate barcodes into a pdf file. I tried it in linux and worked perfectly, but when try it in Windows, i receive some errors. My code is the next:
def crear_barcode(numero):
filename = 'generated/temp/'+numero
writer = barcode.writer.ImageWriter()
code = barcode.Code39(numero,writer,add_checksum = False)
archivo = code.save(filename)
return archivo
and the errors I receiving are that:
Traceback (most recent call last):
File "C:\Documents and Settings\usuario\Escritorio\NIF-master\nif.py", line 23, in generarButton_clicked
generar_codigos(provincia,ciudad,numeroInicial,cantidad)
File "C:\Documents and Settings\usuario\Escritorio\NIF-master\controller\controller.py", line 64, in generar_codigos
archivo.image(crear_barcode(numero),eje_x * 50, linea * 25 , TAMANIO_CODIGO)
File "C:\Documents and Settings\usuario\Escritorio\NIF-master\controller\controller.py", line 43, in crear_barcode
archivo = code.save(filename)
File "C:\Python27\lib\site-packages\pybarcode-0.7-py2.7.egg\barcode\base.py", line 69, in save
_filename = self.writer.save(filename, output)
File "C:\Python27\lib\site-packages\pybarcode-0.7-py2.7.egg\barcode\writer.py", line 291, in save
output.save(filename, self.format.upper())
File "C:\Python27\lib\site-packages\PIL\Image.py", line 1681, in save
save_handler = SAVE[format.upper()]
KeyError: u'PNG'
when I change the save() line and give it an extension ie:
code.save(filename,'png')
I receive that
Traceback (most recent call last):
File "C:\Documents and Settings\usuario\Escritorio\NIF-master\nif.py", line 23, in generarButton_clicked
generar_codigos(provincia,ciudad,numeroInicial,cantidad)
File "C:\Documents and Settings\usuario\Escritorio\NIF-master\controller\controller.py", line 64, in generar_codigos
archivo.image(crear_barcode(numero),eje_x * 50, linea * 25 , TAMANIO_CODIGO)
File "C:\Documents and Settings\usuario\Escritorio\NIF-master\controller\controller.py", line 43, in crear_barcode
archivo = code.save(filename,'png')
File "C:\Python27\lib\site-packages\pybarcode-0.7-py2.7.egg\barcode\base.py", line 68, in save
output = self.render(options)
File "C:\Python27\lib\site-packages\pybarcode-0.7-py2.7.egg\barcode\codex.py", line 105, in render
options.update(writer_options or {})
ValueError: dictionary update sequence element #0 has length 1; 2 is required
I don't understand why occur in windows and not in linux. I have installed all the dependencies, PIL, pyBarcode, pyFpdf.
Upvotes: 0
Views: 658
Reputation: 175
I faced a similar issue earlier, and this is what I did to solved it :
1) Open this file - C:\Python27\lib\site-packages\pybarcode-0.7-py2.7.egg\barcode\writer.py
2) You will see the following code -
try:
import Image, ImageDraw, ImageFont ### The Statement to be edited ####
except ImportError:
try:
from PIL import Image, ImageDraw, ImageFont # lint:ok
except ImportError:
import sys
sys.stderr.write('PIL not found. Image output disabled.\n\n')
Image = ImageDraw = ImageFont = None # lint:ok
3) You need to edit the first import statement to make the code look like the following -
try:
from PIL import Image, ImageDraw, ImageFont ### Edited.
except ImportError:
try:
from PIL import Image, ImageDraw, ImageFont # lint:ok
except ImportError:
import sys
sys.stderr.write('PIL not found. Image output disabled.\n\n')
Image = ImageDraw = ImageFont = None # lint:ok
4) Save the file.
5) Try running your app.
I hope this helps.
Upvotes: 1
Reputation: 729
Without having the full code to test, it looks like this is due to OS specific file separators. Linux uses forward slashes vs. Windows uses backslashes. Try using platform independent filenames:
filename = os.path.join('generated','temp', str(numero))
Upvotes: 0