server/general: fix pylint warnings

server/szurubooru/func/cache.py

@@ -15,8 +15,12 @@ class LruCache(object):
 
     def insert_item(self, item):
         if item.key in self.hash:
-            item_index = next(i for i, v in enumerate(self.item_list) if v.key == item.key)
+            item_index = next(i \
-            self.item_list[:] = self.item_list[:item_index] + self.item_list[item_index+1:]
+                for i, v in enumerate(self.item_list) \
+                if v.key == item.key)
+            self.item_list[:] \
+                = self.item_list[:item_index] \
+                + self.item_list[item_index+1:]
             self.item_list.insert(0, item)
         else:
             if len(self.item_list) > self.length:
@@ -32,25 +36,16 @@ class LruCache(object):
         del self.hash[item.key]
         del self.item_list[self.item_list.index(item)]
 
-    def validate_item(self):
+_CACHE = LruCache(length=100)
-        def _outdated_items():
-            now = datetime.now()
-            for item in self.item_list:
-                time_delta = now - item.timestamp
-                if time_delta.seconds > self.delta:
-                    yield item
-        map(lambda x: self.remove_item(x), _outdated_items())
-
-_cache = LruCache(length=100)
 
 def purge():
-    _cache.remove_all()
+    _CACHE.remove_all()
 
 def has(key):
-    return key in _cache.hash
+    return key in _CACHE.hash
 
 def get(key):
-    return _cache.hash[key].value
+    return _CACHE.hash[key].value
 
 def put(key, value):
-    _cache.insert_item(LruCacheItem(key, value))
+    _CACHE.insert_item(LruCacheItem(key, value))

server/szurubooru/middleware/cache_purger.py

@@ -1,4 +1,3 @@
-import falcon
 from szurubooru.func import cache
 
 class CachePurger(object):

server/szurubooru/search/base_search_config.py

@@ -1,5 +1,4 @@
 import sqlalchemy
-import szurubooru.errors
 from szurubooru import db, errors
 from szurubooru.func import util
 from szurubooru.search import criteria
@@ -55,7 +54,7 @@ class BaseSearchConfig(object):
                     expr = column <= int(criterion.max_value)
             else:
                 assert False
-        except ValueError as e:
+        except ValueError:
             raise errors.SearchError(
                 'Criterion value %r must be a number.' % (criterion,))
         if criterion.negated:

server/szurubooru/search/search_executor.py

@@ -14,13 +14,13 @@ class SearchExecutor(object):
         self.config = search_config
 
     def execute(self, query_text, page, page_size):
-        key = (id(self.config), query_text, page, page_size)
-        if cache.has(key):
-            return cache.get(key)
         '''
         Parse input and return tuple containing total record count and filtered
         entities.
         '''
+        key = (id(self.config), query_text, page, page_size)
+        if cache.has(key):
+            return cache.get(key)
         filter_query = self.config.create_filter_query()
         filter_query = filter_query.options(sqlalchemy.orm.lazyload('*'))
         filter_query = self._prepare(filter_query, query_text)