Merge repeated if statements into single if

aerich/__init__.py

@@ -100,11 +100,8 @@ class Command:
         return ret
 
     async def history(self):
-        ret = []
         versions = Migrate.get_all_version_files()
-        for version in versions:
-            ret.append(version)
-        return ret
+        return [version for version in versions]
 
     async def inspectdb(self, tables: List[str]):
         connection = get_app_connection(self.tortoise_config, self.app)

aerich/ddl/__init__.py

@@ -184,7 +184,7 @@ class BaseDDL:
                 "idx" if not unique else "uid", model, field_names
             ),
             table_name=model._meta.db_table,
-            column_names=", ".join([self.schema_generator.quote(f) for f in field_names]),
+            column_names=", ".join(self.schema_generator.quote(f) for f in field_names),
         )
 
     def drop_index(self, model: "Type[Model]", field_names: List[str], unique=False):

aerich/utils.py

@@ -96,11 +96,10 @@ def get_version_content_from_file(version_file: Union[str, Path]) -> Dict:
             second = len(content) - 1
         upgrade_content = content[first + len(_UPGRADE) : second].strip()  # noqa:E203
         downgrade_content = content[second + len(_DOWNGRADE) :].strip()  # noqa:E203
-        ret = {
+        return {
             "upgrade": list(filter(lambda x: x or False, upgrade_content.split(";\n"))),
             "downgrade": list(filter(lambda x: x or False, downgrade_content.split(";\n"))),
         }
-        return ret
 
 
 def write_version_file(version_file: Path, content: Dict):