Add encoding to file open calls.

.pylintrc

@@ -68,8 +68,7 @@ disable=fixme,
         superfluous-parens,
         bad-continuation,
         line-too-long,
-        bad-option-value,
-        unspecified-encoding
+        bad-option-value
 
 
 # Enable the message, report, category or checker with the given id(s). You can

.pylintrc39

@@ -159,8 +159,7 @@ disable=invalid-name,
         line-too-long,
         super-with-arguments,
         raise-missing-from,
-        bad-option-value,
-        unspecified-encoding
+        bad-option-value
 
 # Enable the message, report, category or checker with the given id(s). You can
 # either give multiple identifier separated by comma (,) or put this option

CHANGELOG.md

@@ -25,6 +25,7 @@ This project adheres to [Semantic Versioning](https://semver.org/).
   - Fix use of the callback context in celery long callbacks.
   - Fix support of pattern matching for long callbacks.
 - [#2110](https://github.com/plotly/dash/pull/2110) Fix `dcc.Dropdown` search with component as prop for option label.
+- [#2131](https://github.com/plotly/dash/pull/2131) Add encoding to file open calls. Fix bug [#2127](https://github.com/plotly/dash/issues/2127).
 
 ## Changed
 

dash/development/_jl_components_generation.py

@@ -404,7 +404,7 @@ def generate_package_file(project_shortname, components, pkg_data, prefix):
         base_package=base_package_name(project_shortname),
     )
     file_path = os.path.join("src", package_name + ".jl")
-    with open(file_path, "w") as f:
+    with open(file_path, "w", encoding="utf-8") as f:
         f.write(package_string)
     print("Generated {}".format(file_path))
 
@@ -435,7 +435,7 @@ def generate_toml_file(project_shortname, pkg_data):
         dash_uuid=base_package_uid(project_shortname),
     )
     file_path = "Project.toml"
-    with open(file_path, "w") as f:
+    with open(file_path, "w", encoding="utf-8") as f:
         f.write(toml_string)
     print("Generated {}".format(file_path))
 
@@ -509,7 +509,7 @@ def generate_struct_file(name, props, description, project_shortname, prefix):
         os.makedirs("src/jl")
 
     file_path = os.path.join("src", "jl", file_name)
-    with open(file_path, "w") as f:
+    with open(file_path, "w", encoding="utf-8") as f:
         f.write(import_string)
         f.write(class_string)
 

dash/development/_py_components_generation.py

@@ -169,15 +169,17 @@ def generate_class_file(
     file_name = f"{typename:s}.py"
 
     file_path = os.path.join(namespace, file_name)
-    with open(file_path, "w") as f:
+    with open(file_path, "w", encoding="utf-8") as f:
         f.write(import_string)
         f.write(class_string)
 
     print(f"Generated {file_name}")
 
 
 def generate_imports(project_shortname, components):
-    with open(os.path.join(project_shortname, "_imports_.py"), "w") as f:
+    with open(
+        os.path.join(project_shortname, "_imports_.py"), "w", encoding="utf-8"
+    ) as f:
         component_imports = "\n".join(f"from .{x} import {x}" for x in components)
         all_list = ",\n".join(f'    "{x}"' for x in components)
         imports_string = f"{component_imports}\n\n__all__ = [\n{all_list}\n]"

dash/development/_r_components_generation.py

@@ -425,7 +425,7 @@ def write_help_file(name, props, description, prefix, rpkg_data):
     # textwrap.fill, starting from the beginning of the usage string
 
     file_path = os.path.join("man", file_name)
-    with open(file_path, "w") as f:
+    with open(file_path, "w", encoding="utf-8") as f:
         f.write(
             help_string.format(
                 funcname=funcname,
@@ -447,7 +447,7 @@ def write_help_file(name, props, description, prefix, rpkg_data):
                 "examples",
                 wrap("dontrun" if the_ex.get("dontrun") else "", the_ex["code"]),
             )
-            with open(file_path, "a+") as fa:
+            with open(file_path, "a+", encoding="utf-8") as fa:
                 fa.write(result + "\n")
 
 
@@ -475,7 +475,7 @@ def write_class_file(
     file_name = format_fn_name(prefix, name) + ".R"
 
     file_path = os.path.join("R", file_name)
-    with open(file_path, "w") as f:
+    with open(file_path, "w", encoding="utf-8") as f:
         f.write(import_string)
         f.write(class_string)
 
@@ -504,7 +504,7 @@ def write_js_metadata(pkg_data, project_shortname, has_wildcards):
         os.makedirs("R")
 
     file_path = os.path.join("R", file_name)
-    with open(file_path, "w") as f:
+    with open(file_path, "w", encoding="utf-8") as f:
         f.write(function_string)
         if has_wildcards:
             f.write(wildcard_helper)
@@ -687,12 +687,12 @@ def generate_rpkg(
     # this avoids having to generate an RData file from within Python.
     write_js_metadata(pkg_data, project_shortname, has_wildcards)
 
-    with open("NAMESPACE", "w+") as f:
+    with open("NAMESPACE", "w+", encoding="utf-8") as f:
         f.write(import_string)
         f.write(export_string)
         f.write(packages_string)
 
-    with open(".Rbuildignore", "w+") as f2:
+    with open(".Rbuildignore", "w+", encoding="utf-8") as f2:
         f2.write(rbuild_ignore_string)
 
     description_string = description_template.format(
@@ -711,7 +711,7 @@ def generate_rpkg(
         vignette_builder=vignette_builder,
     )
 
-    with open("DESCRIPTION", "w+") as f3:
+    with open("DESCRIPTION", "w+", encoding="utf-8") as f3:
         f3.write(description_string)
 
     if rpkg_data is not None:
@@ -723,7 +723,7 @@ def generate_rpkg(
                 lib_name=lib_name,
                 maintainer=maintainer,
             )
-            with open(pkghelp_stub_path, "w") as f4:
+            with open(pkghelp_stub_path, "w", encoding="utf-8") as f4:
                 f4.write(pkghelp)
 
 
@@ -807,7 +807,7 @@ def make_namespace_exports(components, prefix):
             rfilelist += [os.path.join("R", script)]
 
     for rfile in rfilelist:
-        with open(rfile, "r") as script:
+        with open(rfile, "r", encoding="utf-8") as script:
             s = script.read()
 
             # remove comments

dash/development/build_process.py

@@ -29,7 +29,7 @@ def __init__(self, main, deps_info):
         self.asset_paths = (self.deps_folder, self.npm_modules)
 
     def _parse_package(self, path):
-        with open(path, "r") as fp:
+        with open(path, "r", encoding="utf-8") as fp:
             package = json.load(fp)
             self.version = package["version"]
             self.name = package["name"]
@@ -99,7 +99,7 @@ def digest(self):
             for copy in copies:
                 payload[f"MD5 ({copy})"] = compute_md5(self._concat(folder, copy))
 
-        with open(self._concat(self.main, "digest.json"), "w") as fp:
+        with open(self._concat(self.main, "digest.json"), "w", encoding="utf-8") as fp:
             json.dump(payload, fp, sort_keys=True, indent=4, separators=(",", ":"))
         logger.info(
             "bundle digest in digest.json:\n%s",
@@ -143,11 +143,13 @@ def bundles(self, build=None):
         run_command_with_process(f"npm run {_script}")
 
         logger.info("generate the `__init__.py` from template and versions")
-        with open(self._concat(self.main, "init.template")) as fp:
+        with open(self._concat(self.main, "init.template"), encoding="utf-8") as fp:
             t = string.Template(fp.read())
 
         with open(
-            self._concat(self.deps_folder, os.pardir, "_dash_renderer.py"), "w"
+            self._concat(self.deps_folder, os.pardir, "_dash_renderer.py"),
+            "w",
+            encoding="utf-8",
         ) as fp:
             fp.write(t.safe_substitute(versions))
 

dash/development/component_generator.py

@@ -111,7 +111,7 @@ def generate_components(
     generator_methods = [functools.partial(generate_class_file, **py_generator_kwargs)]
 
     if rprefix is not None or jlprefix is not None:
-        with open("package.json", "r") as f:
+        with open("package.json", "r", encoding="utf-8") as f:
             pkg_data = safe_json_loads(f.read())
 
     if rprefix is not None:
@@ -120,7 +120,7 @@ def generate_components(
         if not os.path.exists("R"):
             os.makedirs("R")
         if os.path.isfile("dash-info.yaml"):
-            with open("dash-info.yaml") as yamldata:
+            with open("dash-info.yaml", encoding="utf-8") as yamldata:
                 rpkg_data = yaml.safe_load(yamldata)
         else:
             rpkg_data = None
@@ -135,7 +135,9 @@ def generate_components(
 
     components = generate_classes_files(project_shortname, metadata, *generator_methods)
 
-    with open(os.path.join(project_shortname, "metadata.json"), "w") as f:
+    with open(
+        os.path.join(project_shortname, "metadata.json"), "w", encoding="utf-8"
+    ) as f:
         json.dump(metadata, f, indent=2)
 
     generate_imports(project_shortname, components)

dash/development/component_loader.py

@@ -13,7 +13,7 @@
 
 def _get_metadata(metadata_path):
     # Start processing
-    with open(metadata_path) as data_file:
+    with open(metadata_path, encoding="utf-8") as data_file:
         json_string = data_file.read()
         data = json.JSONDecoder(object_pairs_hook=collections.OrderedDict).decode(
             json_string

dash/development/update_components.py

@@ -119,7 +119,7 @@ def build_components(components_source, concurrency):
             print(f"🚚 Moving build artifacts from {build_directory} to Dash 🚚")
             shutil.rmtree(dest_path)
             shutil.copytree(build_directory, dest_path)
-            with open(os.path.join(dest_path, ".gitkeep"), "w"):
+            with open(os.path.join(dest_path, ".gitkeep"), "w", encoding="utf-8"):
                 pass
             print(f"🟢 Finished moving build artifacts from {build_directory} to Dash 🟢")
 

dash/testing/application_runners.py

@@ -311,7 +311,7 @@ def start(self, app, start_timeout=2, cwd=None):
             logger.debug("content of the dashR app")
             logger.debug("%s", app)
 
-            with open(path, "w") as fp:
+            with open(path, "w", encoding="utf-8") as fp:
                 fp.write(app)
 
             app = path
@@ -408,7 +408,7 @@ def start(self, app, start_timeout=30, cwd=None):
             logger.debug("content of the Dash.jl app")
             logger.debug("%s", app)
 
-            with open(path, "w") as fp:
+            with open(path, "w", encoding="utf-8") as fp:
                 fp.write(app)
 
             app = path

setup.py

@@ -2,11 +2,11 @@
 from setuptools import setup, find_packages
 
 main_ns = {}
-exec(open("dash/version.py").read(), main_ns)  # pylint: disable=exec-used, consider-using-with
+exec(open("dash/version.py", encoding="utf-8").read(), main_ns)  # pylint: disable=exec-used, consider-using-with
 
 
 def read_req_file(req_type):
-    with open(f"requires-{req_type}.txt") as fp:
+    with open(f"requires-{req_type}.txt", encoding="utf-8") as fp:
         requires = (line.strip() for line in fp)
         return [req for req in requires if req and not req.startswith("#")]