Update pylint to conform to unspecified-encoding

With addition of the unspecified-encoding checker calls of open()
need an encoding argument.
Where necessary this argument has been added.

pylint/checkers/similar.py

@@ -546,7 +546,7 @@ def Run(argv=None):
         min_lines, ignore_comments, ignore_docstrings, ignore_imports, ignore_signatures
     )
     for filename in args:
-        with open(filename) as stream:
+        with open(filename, encoding="utf-8") as stream:
             sim.append_stream(filename, stream)
     sim.run()
     sys.exit(0)

pylint/checkers/spelling.py

@@ -318,7 +318,7 @@ def open(self):
                 dict_name, self.config.spelling_private_dict_file
             )
             self.private_dict_file = open(  # pylint: disable=consider-using-with
-                self.config.spelling_private_dict_file, "a"
+                self.config.spelling_private_dict_file, "a", encoding="utf-8"
             )
         else:
             self.spelling_dict = enchant.Dict(dict_name)

pylint/config/find_default_config_files.py

@@ -9,7 +9,7 @@
 
 
 def _toml_has_config(path):
-    with open(path) as toml_handle:
+    with open(path, encoding="utf-8") as toml_handle:
         try:
             content = toml.load(toml_handle)
         except TomlDecodeError as error:

pylint/config/option_manager_mixin.py

@@ -267,7 +267,7 @@ def read_config_file(self, config_file=None, verbose=None):
             parser = self.cfgfile_parser
 
             if config_file.endswith(".toml"):
-                with open(config_file) as fp:
+                with open(config_file, encoding="utf-8") as fp:
                     content = toml.load(fp)
 
                 try:

pylint/lint/pylinter.py

@@ -571,7 +571,9 @@ def _load_reporters(self) -> None:
                     (reporter_output,) = reporter_output
 
                     # pylint: disable=consider-using-with
-                    output_file = stack.enter_context(open(reporter_output, "w"))
+                    output_file = stack.enter_context(
+                        open(reporter_output, "w", encoding="utf-8")
+                    )
 
                     reporter.set_output(output_file)
                     output_files.append(output_file)
@@ -617,8 +619,9 @@ def set_option(self, optname, value, action=None, optdict=None):
                 except KeyError:
                     meth = self._bw_options_methods[optname]
                     warnings.warn(
-                        "%s is deprecated, replace it by %s"
-                        % (optname, optname.split("-")[0]),
+                        "{} is deprecated, replace it by {}".format(
+                            optname, optname.split("-")[0]
+                        ),
                         DeprecationWarning,
                     )
                 value = utils._check_csv(value)

pylint/lint/run.py

@@ -373,7 +373,7 @@ def __init__(
 
         if self._output:
             try:
-                with open(self._output, "w") as output:
+                with open(self._output, "w", encoding="utf-8") as output:
                     linter.reporter.set_output(output)
                     linter.check(args)
                     score_value = linter.generate_reports()

pylint/pyreverse/utils.py

@@ -35,7 +35,7 @@ def get_default_options():
     if home:
         rcfile = os.path.join(home, RCFILE)
         try:
-            with open(rcfile) as file_handle:
+            with open(rcfile, encoding="utf-8") as file_handle:
                 options = file_handle.read().split()
         except OSError:
             pass  # ignore if no config file found

pylint/pyreverse/writer.py

@@ -187,7 +187,9 @@ def __init__(self, config):
 
     def set_printer(self, file_name, basename):
         """initialize VCGWriter for a UML graph"""
-        self.graph_file = open(file_name, "w+")  # pylint: disable=consider-using-with
+        self.graph_file = open(  # pylint: disable=consider-using-with
+            file_name, "w+", encoding="utf-8"
+        )
         self.printer = VCGPrinter(self.graph_file)
         self.printer.open_graph(
             title=basename,

pylint/testutils/lint_module_test.py

@@ -141,14 +141,14 @@ def multiset_difference(
     # pylint: disable=consider-using-with
     def _open_expected_file(self):
         try:
-            return open(self._test_file.expected_output)
+            return open(self._test_file.expected_output, encoding="utf-8")
         except FileNotFoundError:
             return StringIO("")
 
     # pylint: disable=consider-using-with
     def _open_source_file(self):
         if self._test_file.base == "invalid_encoded_data":
-            return open(self._test_file.source)
+            return open(self._test_file.source, encoding="utf-8")
         if "latin1" in self._test_file.base:
             return open(self._test_file.source, encoding="latin1")
         return open(self._test_file.source, encoding="utf8")