Better PEP 8 compatibility of generated callbacks (#532)

Author: droserasprout

CHANGELOG.md

@@ -15,6 +15,7 @@ The format is based on [Keep a Changelog], and this project adheres to [Semantic
 
 ### Fixed
 
+- codegen: Better PEP 8 compatibility of generated callbacks.
 - cli: Fixed missing log messages from `ctx.logger`.
 - cli: Configure package logger in addition to `dipdup` one.
 - context: Fixed `execute_sql` method crashes when the path is a file.

src/dipdup/codegen.py

@@ -417,7 +417,7 @@ async def _generate_callback(self, callback_config: CallbackMixin, sql: bool = F
             callback_code = callback_template.render(
                 callback=callback,
                 arguments=tuple(dict.fromkeys(arguments)),
-                imports=tuple(dict.fromkeys(imports)),
+                imports=sorted(dict.fromkeys(imports)),
                 code=code,
             )
             write(callback_path, callback_code)

src/dipdup/templates/callback.py.j2

@@ -1,6 +1,5 @@
-{%- for imp in imports %}
-{{ imp }}
-{%- endfor %}
+{% for imp in imports %}{{ imp }}
+{% endfor %}
 
 async def {{ callback }}(
 {%- for arg in arguments %}