Make use of pylint to cleanup the syntax.

dircreate/__init__.py

@@ -1,5 +1,13 @@
 #!/usr/bin/env python3
 
+"""This code creates a directory named after the user.
+
+When a user starts using one of the shinyproxy services, a home directory will
+be created in the NFS server if it does not exist yet.
+The home directory will be then mounted by the shinyproxy service inside the
+application container.
+"""
+
 import configparser
 import os
 from os.path import exists
@@ -9,61 +17,65 @@ from flask import request
 debug = False
 
 if debug:
-    config_path_dir = '/tmp'
+  config_path_dir = '/tmp'
 else:
-    config_path_dir = './instance'
-config_filename = f"{config_path_dir}/config.ini"
+  config_path_dir = './instance'
+  config_filename = f'{config_path_dir}/config.ini'
 
 if exists(config_filename):
-    config = configparser.ConfigParser()
-    config.read(config_filename)
-    if debug:
-        print("Sections found in the config file: ", config.sections())
-    if 'create-homedir' in config.sections():
-        for key in config['create-homedir']:
-            if debug:
-                print('Key: ', key)
-            if config['create-homedir']['SECRET_KEY']:
-                SECRET_KEY = config['create-homedir']['SECRET_KEY']
-            else:
-                raise SystemExit('Error: config file, no SECRET_KEY found.')
-            if config['create-homedir']['DIR_PREFIX']:
-                DIR_PREFIX = config['create-homedir']['DIR_PREFIX']
-            else:
-                raise SystemExit('Error: config file, no DIR_PREFIX found.')
-    else:
-        raise SystemExit('Error: no create-homedir section found.')
+  config = configparser.ConfigParser()
+  config.read(config_filename)
+  if debug:
+    print('Sections found in the config file: ', config.sections())
+  if 'create-homedir' in config.sections():
+    for key in config['create-homedir']:
+      if debug:
+        print('Key: ', key)
+      if config['create-homedir']['SECRET_KEY']:
+        SECRET_KEY = config['create-homedir']['SECRET_KEY']
+      else:
+        raise SystemExit('Error: config file, no SECRET_KEY found.')
+      if config['create-homedir']['DIR_PREFIX']:
+        DIR_PREFIX = config['create-homedir']['DIR_PREFIX']
+      else:
+        raise SystemExit('Error: config file, no DIR_PREFIX found.')
+  else:
+    raise SystemExit('Error: no create-homedir section found.')
 else:
-    raise SystemExit('Error: no config file found.')
+  raise SystemExit('Error: no config file found.')
+
 
 def make_homedir(dir_path):
-    if not os.path.isdir(dir_path):
-        permissions = 0o700
-        try:
-            os.mkdir(dir_path, permissions)
-        except OSError:
-            return("Creation of the directory %s failed" % dir_path), 500
-        else:
-            return("Directory %s created successfully" % dir_path), 200
+  """Create the directory if it does not exist.
+  """
+  if not os.path.isdir(dir_path):
+    permissions = 0o700
+    try:
+      os.mkdir(dir_path, permissions)
+    except OSError:
+      return(f'Creation of the directory {dir_path} failed'), 500
     else:
-        return("Directory %s already exists" % dir_path), 200
+      return(f'Directory {dir_path} created successfully'), 200
+  return(f'Directory {dir_path} already exists'), 200
+
 
 def create_app(test_config=None):
-    # create and configure the app
-    create_home = Flask(__name__, instance_relative_config=True)
-    # ensure the instance folder exists
-    try:
-        os.path.isdir(DIR_PREFIX)
-    except OSError:
-        pass
+  """Initialize the service and start it.
+  """
+  # create and configure the app
+  create_home = Flask(__name__, instance_relative_config=True)
+  # ensure the instance folder exists
+  try:
+    os.path.isdir(DIR_PREFIX)
+  except OSError:
+    pass
 
-    # a simple page that says hello
-    @create_home.route('/', methods=['GET', 'POST'])
-    def makedir():
-        if request.method == 'POST':
-            username = request.form['user']
-            return make_homedir(f"{DIR_PREFIX}/{username}")
-        else:
-            return "Nosey, aren't you?"
+  @create_home.route('/', methods=['GET', 'POST'])
+  def makedir():
+    if request.method == 'POST':
+      username = request.form['user']
+      return make_homedir(f'{DIR_PREFIX}/{username}')
+    else:
+      return "Nosey, aren't you?"
 
-    return create_home
+  return create_home