docs: Fix coding style of Python scripts using YAPF (#2606)

docs/build_website.py

@@ -10,13 +10,15 @@ import shutil
 import yaml
 
 env = Environment(
-  loader=FileSystemLoader('templates'),
-  autoescape=select_autoescape(['html.j2']),
+    loader=FileSystemLoader('templates'),
+    autoescape=select_autoescape(['html.j2']),
 )
 
+
 def load_yml_file(fn):
-  with open(fn) as f:
-    return yaml.safe_load(f)
+    with open(fn) as f:
+        return yaml.safe_load(f)
+
 
 env.filters['search_id'] = lambda input: input.replace(r'`', '')
 env.filters['section_id'] = lambda input: re.sub(r"[^a-zA-Z0-9_]", '', input)
@@ -24,47 +26,52 @@ env.filters['entry_id'] = lambda input: re.sub(r"[ `]", '', input)
 env.filters['markdownify'] = lambda input: Markup(markdown(input))
 env.filters['no_paragraph'] = lambda input: Markup(re.sub(r"</?p>", '', input))
 
-env.globals['unique_id'] = contextfunction(lambda ctx: str(next(ctx['unique_ctr'])))
-
+env.globals['unique_id'] = contextfunction(
+    lambda ctx: str(next(ctx['unique_ctr'])))
 
 env.globals.update(load_yml_file('site.yml'))
 
-
 env.globals['navigation'] = ['tutorial', 'download', 'manual']
 
+
 def generate_file(env, fname='content/1.tutorial/default.yml'):
-  path, base = os.path.split(fname)
-  path = os.path.relpath(path, 'content')
-  if path == '.':
-    path = ''
-    slug = 'index'
-    permalink = ''
-  else:
-    slug = os.path.basename(path)
-    permalink = path + '/'
+    path, base = os.path.split(fname)
+    path = os.path.relpath(path, 'content')
+    if path == '.':
+        path = ''
+        slug = 'index'
+        permalink = ''
+    else:
+        slug = os.path.basename(path)
+        permalink = path + '/'
 
-  output_dir = os.path.join('output', path)
-  output_path = os.path.join(output_dir, 'index.html')
+    output_dir = os.path.join('output', path)
+    output_path = os.path.join(output_dir, 'index.html')
 
-  template_name = re.sub(r".yml$", '.html.j2', base)
+    template_name = re.sub(r".yml$", '.html.j2', base)
 
-  ctx = load_yml_file(fname)
-  ctx.update(unique_ctr=itertools.count(1), permalink=permalink, slug=slug, navitem=path)
-  os.makedirs(output_dir, exist_ok=True)
-  env.get_template(template_name).stream(ctx).dump(output_path, encoding='utf-8')
+    ctx = load_yml_file(fname)
+    ctx.update(unique_ctr=itertools.count(1),
+               permalink=permalink,
+               slug=slug,
+               navitem=path)
+    os.makedirs(output_dir, exist_ok=True)
+    env.get_template(template_name).stream(ctx).dump(output_path,
+                                                     encoding='utf-8')
 
 
 def copy_public_files(root=''):
-  for f in os.scandir(os.path.join('public', root)):
-    src = os.path.join(root, f.name)
-    dst = os.path.join('output', src)
-    if f.is_dir():
-      os.makedirs(dst, exist_ok=True)
-      copy_public_files(src)
-    else:
-      shutil.copyfile(f.path, dst)
+    for f in os.scandir(os.path.join('public', root)):
+        src = os.path.join(root, f.name)
+        dst = os.path.join('output', src)
+        if f.is_dir():
+            os.makedirs(dst, exist_ok=True)
+            copy_public_files(src)
+        else:
+            shutil.copyfile(f.path, dst)
+
 
 copy_public_files()
 
 for fn in glob.glob('content/**/*.yml', recursive=True):
-  generate_file(env, fn)
+    generate_file(env, fn)