Migrate to python 3

sale.py

@@ -13,8 +13,7 @@ SALE_LINE_FIELD_MAP = {
     }
 
 
-class SaleLine:
-    __metaclass__ = PoolMeta
+class SaleLine(metaclass=PoolMeta):
     __name__ = 'sale.line'
     # TODO 4.x sale_sate field is available since v4.2
     sale_state = fields.Function(fields.Selection([

setup.py

@@ -7,10 +7,7 @@ from setuptools import setup
 import re
 import os
 import io
-try:
-    from configparser import ConfigParser
-except ImportError:
-    from ConfigParser import ConfigParser
+from configparser import ConfigParser
 
 MODULE2PREFIX = {}
 

tests/scenario_product_sale_line_relation.rst

@@ -142,11 +142,11 @@ Search Sale Lines::
     3
     >>> line1, line2, line3 = lines
     >>> line1.sale_state
-    u'quotation'
+    'quotation'
     >>> sale = line1.sale
     >>> sale.click('confirm')
     >>> line1.reload()
     >>> line1.sale_state
-    u'confirmed'
+    'processing'
     >>> line1.sale_date == today
     True