depgen.py/deplist.py: address IDE warnings and suggestions.

mkhelper/depgen.py

@@ -460,7 +460,7 @@ def module_start_callback(module):
     def module_use_callback(module):
         required_modules.add(module)
 
-    def submodule_start_callback(submodule, parent, module):
+    def submodule_start_callback(_submodule, _parent, module):
         required_modules.add(module)
 
     lc_debug_info = None

mkhelper/depgen/__init__.py

@@ -34,13 +34,15 @@
 try:
     from itertools import zip_longest as zip_longest23
 except ImportError:
+    # noinspection PyUnresolvedReferences
     from itertools import izip_longest as zip_longest23
 
 
 def open23(name, mode="r"):
     if sys.version_info < (3, 0, 0):
         return open(name, mode)
     else:
+        # noinspection PyArgumentList
         return open(name, mode, encoding="latin-1")
 
 

mkhelper/depgen/fortran_parser.py

@@ -40,7 +40,7 @@
 
 
 class FortranParser:
-    _re_include = re.compile(r'^\s*include\s+(\'|")(.*?)\1', re.I)
+    _re_include = re.compile(r'^\s*include\s+([\'"])(.*?)\1', re.I)
     _re_line_continue_start = re.compile(r"^(.*)&\s*$")
     _re_line_continue_end = re.compile(r"^\s*&")
     _re_module_start = re.compile(
@@ -212,6 +212,7 @@ def parse(self, stream, stream_name):
 
         # return an empty iterator
         return
+        # noinspection PyUnreachableCode
         yield
 
     @staticmethod

mkhelper/depgen/preprocessor.py

@@ -409,5 +409,5 @@ def eval_expression(self, expr):
         try:
             result = bool(eval(expr, {}))
             return 1 if result else -1
-        except:
+        except Exception:
             return 0

mkhelper/deplist.py

@@ -498,7 +498,7 @@ def check_cycles_skip_visit_cb(vertex):
                     args.check_colour,
                 )
 
-        def check_cycles_finish_visit_cb(vertex):
+        def check_cycles_finish_visit_cb(_):
             path.pop()
 
         start_visit_cb_list.append(check_cycles_start_visit_cb)