Fix of overriding variables in general

Author: horejsek

CHANGELOG.txt

@@ -1,3 +1,8 @@
+=== 2.4 (unreleased)
+
+* Fix overriding variables (in pattern properties, property names, unique items and contains)
+
+
 === 2.3 (2018-09-14) ===
 
 * Fix regex of hostname

fastjsonschema/draft04.py

@@ -292,7 +292,7 @@ def generate_unique_items(self):
             2.1439831256866455
         """
         self.create_variable_with_length()
-        with self.l('if {variable}_len > len(set(str(x) for x in {variable})):'):
+        with self.l('if {variable}_len > len(set(str({variable}_x) for {variable}_x in {variable})):'):
             self.l('raise JsonSchemaException("{name} must contain unique items")')
 
     def generate_items(self):

fastjsonschema/draft06.py

@@ -105,11 +105,11 @@ def generate_property_names(self):
                 self.create_variable_with_length()
                 with self.l('if {variable}_len != 0:'):
                     self.l('{variable}_property_names = True')
-                    with self.l('for key in {variable}:'):
+                    with self.l('for {variable}_key in {variable}:'):
                         with self.l('try:'):
                             self.generate_func_code_block(
                                 property_names_definition,
-                                'key',
+                                '{}_key'.format(self._variable),
                                 self._variable_name,
                                 clear_variables=True,
                             )
@@ -143,11 +143,11 @@ def generate_contains(self):
                     self.l('raise JsonSchemaException("{name} must not be empty")')
             else:
                 self.l('{variable}_contains = False')
-                with self.l('for key in {variable}:'):
+                with self.l('for {variable}_key in {variable}:'):
                     with self.l('try:'):
                         self.generate_func_code_block(
                             contains_definition,
-                            'key',
+                            '{}_key'.format(self._variable),
                             self._variable_name,
                             clear_variables=True,
                         )