diff --git a/data.py b/data.py
index ef68d69..32e7564 100755
--- a/data.py
+++ b/data.py
@@ -68,9 +68,9 @@ class DefList:
             type = defTypeR [type.decode()]
             line = int(line)
             family = family.decode()
-            yield(id, type, line, family)
+            yield id, type, line, family
         if dummy:
-            yield(maxId, None, None, None)
+            yield maxId, None, None, None
 
     def append(self, id, type, line, family):
         if type not in defTypeD:
@@ -108,9 +108,9 @@ class PathList:
             id, path = p.split(b' ',maxsplit=1)
             id = int(id)
             path = path.decode()
-            yield(id, path)
+            yield id, path
         if dummy:
-            yield(maxId, None)
+            yield maxId, None
 
     def append(self, id, path):
         p = str(id).encode() + b' ' + path + b'\n'
@@ -133,9 +133,9 @@ class RefList:
             b = int(b.decode())
             c = c.decode()
             d = d.decode()
-            yield(b, c, d)
+            yield b, c, d
         if dummy:
-            yield(maxId, None, None)
+            yield maxId, None, None
 
     def append(self, id, lines, family):
         p = str(id) + ':' + lines + ':' + family + '\n'
diff --git a/http/filters/dtscomp.py b/http/filters/dtscomp.py
index 8d54276..4030b02 100644
--- a/http/filters/dtscomp.py
+++ b/http/filters/dtscomp.py
@@ -1,6 +1,6 @@
 # Elixir Python definitions for DT compatible strings support
 
-if(dts_comp_support):
+if dts_comp_support:
     exec(open('dtscompC.py').read())
     exec(open('dtscompD.py').read())
     exec(open('dtscompB.py').read())
diff --git a/http/web.py b/http/web.py
index bd175e7..6531123 100755
--- a/http/web.py
+++ b/http/web.py
@@ -339,16 +339,16 @@ elif mode == 'ident':
             previous_type = ''
             types_count = {}
 
-            # Count occurences of each type before printing
+            # Count occurrences of each type before printing
             for symbol_definition in symbol_definitions:
-                if (symbol_definition.type in types_count):
+                if symbol_definition.type in types_count:
                         types_count[symbol_definition.type] += 1
                 else:
                         types_count[symbol_definition.type] = 1
 
             for symbol_definition in symbol_definitions:
-                if (symbol_definition.type != previous_type) :
-                    if (previous_type != ''):
+                if symbol_definition.type != previous_type:
+                    if previous_type != '':
                         print('</ul>')
                     print('<h2>Defined in '+str(types_count[symbol_definition.type])+' files as a '+symbol_definition.type+':</h2>')
                     print('<ul>')
diff --git a/query.py b/query.py
index 2584f85..9f5cc8b 100755
--- a/query.py
+++ b/query.py
@@ -106,7 +106,7 @@ def query(cmd, *args):
 
     elif cmd == 'exist':
 
-        # Returns True if the requested file exists, overwise returns False
+        # Returns True if the requested file exists, otherwise returns False
 
         version = args[0]
         path = args[1]
@@ -232,7 +232,7 @@ def query(cmd, *args):
             return get_idents_defs(version, ident, family)
 
     else:
-        return('Unknown subcommand: ' + cmd + '\n')
+        return 'Unknown subcommand: ' + cmd + '\n'
 
 def get_idents_comps(version, ident):
 
diff --git a/utils/speedtest.py b/utils/speedtest.py
index 91f7d18..129e808 100755
--- a/utils/speedtest.py
+++ b/utils/speedtest.py
@@ -96,10 +96,10 @@ def get_file(path, version):
 
 
 #Read arguments
-if(len(sys.argv) > 1):
-    if(sys.argv[1] == '-v'):
+if len(sys.argv) > 1:
+    if sys.argv[1] == '-v':
         verbose = True
-    elif (sys.argv[1] == '-h'):
+    elif sys.argv[1] == '-h':
         print("LXR_PROJ_DIR needs to be set before launching this script\n" +
                 "Options :\n" +
                 "-v     Verbose mode (Show requests details)")
@@ -107,7 +107,7 @@ if(len(sys.argv) > 1):
 
 #Query init
 query = init_query(project)
-if(query == None):
+if query == None:
     exit()
 
 #Database test