Imported zip from future_builtins instead of itertools.izip.

In Python 3, itertools.izip is not available any more (behaviour
integrated in standard zip).

django/contrib/gis/db/models/sql/compiler.py

@@ -1,4 +1,5 @@
-from itertools import izip
+from future_builtins import zip
+
 from django.db.backends.util import truncate_name, typecast_timestamp
 from django.db.models.sql import compiler
 from django.db.models.sql.constants import MULTI
@@ -32,7 +33,7 @@ def get_columns(self, with_aliases=False):
         if self.query.select:
             only_load = self.deferred_to_columns()
             # This loop customized for GeoQuery.
-            for col, field in izip(self.query.select, self.query.select_fields):
+            for col, field in zip(self.query.select, self.query.select_fields):
                 if isinstance(col, (list, tuple)):
                     alias, column = col
                     table = self.query.alias_map[alias].table_name
@@ -78,7 +79,7 @@ def get_columns(self, with_aliases=False):
         ])
 
         # This loop customized for GeoQuery.
-        for (table, col), field in izip(self.query.related_select_cols, self.query.related_select_fields):
+        for (table, col), field in zip(self.query.related_select_cols, self.query.related_select_fields):
             r = self.get_field_select(field, table, col)
             if with_aliases and col in col_aliases:
                 c_alias = 'Col%d' % len(col_aliases)
@@ -184,7 +185,7 @@ def resolve_columns(self, row, fields=()):
         values = [self.query.convert_values(v,
                                self.query.extra_select_fields.get(a, None),
                                self.connection)
-                  for v, a in izip(row[rn_offset:index_start], aliases)]
+                  for v, a in zip(row[rn_offset:index_start], aliases)]
         if self.connection.ops.oracle or getattr(self.query, 'geo_values', False):
             # We resolve the rest of the columns if we're on Oracle or if
             # the `geo_values` attribute is defined.

django/contrib/gis/utils/ogrinspect.py

@@ -5,7 +5,7 @@
 
 Author: Travis Pinney, Dane Springmeyer, & Justin Bronn
 """
-from itertools import izip
+from future_builtins import zip
 # Requires GDAL to use.
 from django.contrib.gis.gdal import DataSource
 from django.contrib.gis.gdal.field import OFTDate, OFTDateTime, OFTInteger, OFTReal, OFTString, OFTTime
@@ -165,7 +165,7 @@ def get_kwargs_str(field_name):
 
     yield 'class %s(models.Model):' % model_name
 
-    for field_name, width, precision, field_type in izip(ogr_fields, layer.field_widths, layer.field_precisions, layer.field_types):
+    for field_name, width, precision, field_type in zip(ogr_fields, layer.field_widths, layer.field_precisions, layer.field_types):
         # The model field name.
         mfield = field_name.lower()
         if mfield[-1:] == '_': mfield += 'field'

django/db/models/base.py

@@ -1,7 +1,7 @@
 import copy
 import sys
 from functools import update_wrapper
-from itertools import izip
+from future_builtins import zip
 
 import django.db.models.manager     # Imported to register signal handler.
 from django.conf import settings
@@ -292,15 +292,15 @@ def __init__(self, *args, **kwargs):
 
         fields_iter = iter(self._meta.fields)
         if not kwargs:
-            # The ordering of the izip calls matter - izip throws StopIteration
+            # The ordering of the zip calls matter - zip throws StopIteration
             # when an iter throws it. So if the first iter throws it, the second
             # is *not* consumed. We rely on this, so don't change the order
             # without changing the logic.
-            for val, field in izip(args, fields_iter):
+            for val, field in zip(args, fields_iter):
                 setattr(self, field.attname, val)
         else:
             # Slower, kwargs-ready version.
-            for val, field in izip(args, fields_iter):
+            for val, field in zip(args, fields_iter):
                 setattr(self, field.attname, val)
                 kwargs.pop(field.name, None)
                 # Maintain compatibility with existing calls.

django/db/models/sql/compiler.py

@@ -1,4 +1,4 @@
-from itertools import izip
+from future_builtins import zip
 
 from django.core.exceptions import FieldError
 from django.db import transaction
@@ -882,7 +882,7 @@ def as_sql(self):
             placeholders = [["%s"] * len(fields)]
         else:
             placeholders = [
-                [self.placeholder(field, v) for field, v in izip(fields, val)]
+                [self.placeholder(field, v) for field, v in zip(fields, val)]
                 for val in values
             ]
         if self.return_id and self.connection.features.can_return_id_from_insert:
@@ -899,7 +899,7 @@ def as_sql(self):
         else:
             return [
                 (" ".join(result + ["VALUES (%s)" % ", ".join(p)]), vals)
-                for p, vals in izip(placeholders, params)
+                for p, vals in zip(placeholders, params)
             ]
 
     def execute_sql(self, return_id=False):