Non-trivial changes for asyncpg.py file

Author: ShahriyarR

src/gino/dialects/asyncpg.py

@@ -135,10 +135,7 @@ async def _get_cursor(self, *params, **kwargs):
  async def _execute(self, params, one):
  if one:
  rv = await self._prepared.fetchrow(*params)
- if rv is None:
- rv = []
- else:
- rv = [rv]
+ rv = [] if rv is None else [rv]
  else:
  rv = await self._prepared.fetch(*params)
  return self._prepared.get_statusmsg(), rv
@@ -211,10 +208,7 @@ async def execute_baked(self, baked_query, timeout, args, one):
 
  if one:
  rv = await stmt.fetchrow(*args, timeout=timeout)
- if rv is None:
- rv = []
- else:
- rv = [rv]
+ rv = [] if rv is None else [rv]
  else:
  rv = await stmt.fetch(*args, timeout=timeout)
  self._attributes = stmt.get_attributes()
@@ -342,7 +336,7 @@ class NullPool(base.Pool):
  # TODO: generic NullPool, abstracting connection part
  def __init__(self, url, loop, **kwargs):
  self._loop = loop
- self._kwargs = dict()
+ self._kwargs = {}
  for k in inspect.getfullargspec(asyncpg.connect).kwonlyargs:
  if k in kwargs:
  self._kwargs[k] = kwargs[k]
@@ -664,7 +658,6 @@ async def has_type(self, connection, type_name, schema=None):
  AND n.nspname = :nspname
  )
  """
- query = sql.text(query)
  else:
  query = """
  SELECT EXISTS (
@@ -673,7 +666,7 @@ async def has_type(self, connection, type_name, schema=None):
  AND pg_type_is_visible(t.oid)
  )
  """
-  query = sql.text(query)
+ query = sql.text(query)
  query = query.bindparams(
  sql.bindparam(
  "typname",