fix PEP8 E303 and make the code check more strict

.github/workflows/test_code.yml

@@ -2,7 +2,7 @@ name: test-code
 on: [push, pull_request]
 jobs:
   lint-python-code:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v1
       - uses: ricardochaves/python-lint@v1.4.0
@@ -14,4 +14,4 @@ jobs:
           use-black: false
           use-mypy: false
           use-isort: false
-          extra-pycodestyle-options: "--ignore=E226,E301,E302,E303,E402,W503,W504 --max-line-length=120 --max-doc-length=120"
+          extra-pycodestyle-options: "--ignore=E402,W503,W504 --max-line-length=120 --max-doc-length=120"

ks_includes/functions.py

@@ -17,7 +17,6 @@ try:
     ctypes.cdll.LoadLibrary('libXext.so.6')
     libXext = ctypes.CDLL('libXext.so.6')
 
-
     class DPMS_State:
         Fail = -1
         On = 0
@@ -25,7 +24,6 @@ try:
         Suspend = 2
         Off = 3
 
-
     def get_DPMS_state(display_name_in_byte_string=b':0'):
         state = DPMS_State.Fail
         if not isinstance(display_name_in_byte_string, bytes):
@@ -48,7 +46,6 @@ try:
             libXext.XCloseDisplay(display)
         return state
 
-
     dpms_loaded = True
 except Exception:
     pass

panels/bed_mesh.py

@@ -142,7 +142,6 @@ class BedMeshPanel(ScreenPanel):
             button_box.add(buttons["load"])
             button_box.add(buttons["view"])
 
-
         box = Gtk.Box(orientation=Gtk.Orientation.HORIZONTAL, spacing=5)
         box.pack_start(name, True, True, 0)
         box.pack_start(button_box, False, False, 0)
@@ -177,7 +176,6 @@ class BedMeshPanel(ScreenPanel):
             return True
         return False
 
-
     def load_meshes(self):
         bm_profiles = self._screen.printer.get_config_section_list("bed_mesh ")
         logging.info(f"Bed profiles: {bm_profiles}")

scripts/check_code.sh

@@ -1,3 +1,3 @@
 #!/bin/bash
 
-pycodestyle --ignore=E226,E301,E302,E303,E402,W503,W504 --max-line-length=120 --max-doc-length=120 screen.py ks_includes panels
+pycodestyle --ignore=E402,W503,W504 --max-line-length=120 --max-doc-length=120 screen.py ks_includes panels