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#!/usr/bin/env python
from sys import argv
import zbar

# create a Processor
proc = zbar.Processor()

# configure the Processor
proc.parse_config('enable')

# initialize the Processor
device = '/dev/video0'
if len(argv) > 1:
    device = argv[1]
proc.init(device)

# enable the preview window
proc.visible = True

# read at least one barcode (or until window closed)
proc.process_one()

# hide the preview window
proc.visible = False

# extract results
for symbol in proc.results:
    # do something useful with results
    print('decoded', symbol.type, 'symbol', '"%s"' % symbol.data)