barcode image

[gangadhar kadam]

Hello All,
   I have installed pyBarcode/0.7 using "pip install pyBarcode". I have created a custom doctype for barcode and wrote following code in barcode.py
  import barcode
  from barcode.writer import ImageWriter
  EAN = barcode.get_barcode_class('ean13')
  ean = EAN(u'5901234123457', writer=ImageWriter())
  fullname = ean.save('ean13_kadam')

 but got  following error

File "../app/selling/doctype/barcode/barcode.py", line 11, in on_update
    from barcode.writer import ImageWriter
 ImportError: No module named writer

same code works in python terminal and in ERPNext cgi

how to resolve this issue?

Thank you

[Anand Doshi]

Hi Gangadhar,

When importing modules, python searches the local folder first and then the python path.

In this case, when executing barcode.py, python found that a module named barcode exists in the local folder i.e. app.some_module.doctype.barcode.barcode, and hence, it isn't able to find the barcode module.

You can confirm this by checking dir(barcode) after import barcode

As a workaround, you can write a function - create_barcode_image in, say, erpnext_module_name/utils.py, and use:

from erpnext_module_name.utils import create_barcode_image

-Anand.

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