Merge pull request #42 from sudiptob2/refactor/41-strict-flake8

Refactor/41 strict flake8

Author: sudiptob2

.github/check.sh

@@ -0,0 +1,40 @@
+#!/usr/bin/env sh
+
+set -o errexit
+set -o nounset
+
+pyclean() {
+  # Cleaning cache:
+  find . |
+    grep -E '(__pycache__|\.hypothesis|\.perm|\.cache|\.static|\.py[cod]$)' |
+    xargs rm -rf
+}
+
+run_checks() {
+  echo '[Check Started]'
+  set -x # we want to print commands during the CI process.
+
+  # Running linting for all python files in the project:
+  python -m flake8
+
+  # Running type checking, see https://github.com/typeddjango/django-stubs
+  python -m mypy leeteasy tests
+
+  # Running tests:
+  python -m pytest --cov
+
+  # Checking dependencies status:
+  python -m pip check
+
+  set +x
+  echo '[checks completed]'
+}
+
+# Remove any cache before the script:
+pyclean
+
+# Clean everything up:
+trap pyclean EXIT INT TERM
+
+# Run the CI process:
+run_checks

Pipfile

@@ -13,6 +13,13 @@ notify-py = "*"
 flake8 = "*"
 pytest = "*"
 pytest-mock = "*"
+mypy = "*"
+darglint = "*"
+flake8-docstrings = "*"
+wemake-python-styleguide = "*"
+flake8-pytest-style = "*"
+flake8-bandit = "*"
+pytest-cov = "*"
 
 [requires]
 python_version = "3.8"

Pipfile.lock

@@ -5,6 +5,7 @@
 import click
 import schedule
 
+from leeteasy.constant import Constant
 from leeteasy.services.notification_service import Notifier
 from leeteasy.utils.validatiors import TimeValidator
 
@@ -14,13 +15,13 @@
     '-d',
     '--difficulty',
     type=click.Choice(['Medium', 'Hard'], case_sensitive=False),
-    help='Additional problem difficulty for notification.'
+    help='Additional problem difficulty for notification.',
 )
 @click.option(
-    "--sleep_duration",
-    default=3600,
-    type=click.IntRange(1, 3600, clamp=True),
-    help='Sleep duration in seconds.'
+    '--sleep_duration',
+    default=Constant.DEFAULT_SLEEP,
+    type=click.IntRange(1, Constant.DEFAULT_SLEEP, clamp=True),
+    help='Sleep duration in seconds.',
 )
 @click.argument('time')
 def execute_start(time, difficulty, sleep_duration) -> None:
@@ -33,30 +34,32 @@ def execute_start(time, difficulty, sleep_duration) -> None:
     Notifier.target_difficulty.append(difficulty)
     schedule.every().day.at(time).do(Notifier.notify)
 
-    while True:
+    while True:  # NOQA: WPS457
         schedule.run_pending()
         clock.sleep(sleep_duration)
 
 
 @click.command('stop')
 def execute_stop() -> None:
-    """Stops leeteasy process"""
+    """Stop leeteasy process."""
     os.system('pkill -9 -f leeteasy')
 
 
 @click.group('leeteasy')
 def execute_root():
-    """v0.4.0 | supported version strings: 0.7.2"""
-    pass
+    """Group child command."""
 
 
 execute_root.add_command(execute_start)
 execute_root.add_command(execute_stop)
 
 if __name__ == '__main__':
     if platform != 'win32':
-        import pwd
+        import pwd  # NOQA: WPS433
 
-        os.environ[
-            'DBUS_SESSION_BUS_ADDRESS'] = f'unix:path=/run/user/{pwd.getpwuid(os.getuid()).pw_uid}/bus'  # NOQA: E501
+        bus_addr = 'unix:path=/run/user/{0}/bus'.format(
+            pwd.getpwuid(os.getuid()).pw_uid,
+        )
+
+        os.environ['DBUS_SESSION_BUS_ADDRESS'] = bus_addr
     execute_root()

leeteasy/__main__.py

@@ -34,3 +34,6 @@ class Constant:
 
     # http call retries
     HTTP_CALL_RETRIES = 3
+
+    # default sleep duration
+    DEFAULT_SLEEP = 3600

leeteasy/constant.py

@@ -1,39 +1,44 @@
-from typing import List
+from typing import Dict, List, Optional
 
 
 class Challenge:
     """Singleton Model class for daily challenge."""
 
     title: str = ''
-    raw_tags: List[dict] = None
+    raw_tags: List[Dict[str, str]] = []
     ac_rate: float = 0
-    difficulty: str = None
-    question_id: int = None
+    difficulty: str = ''
+    question_id: int = 0
     title_slug: str = ''
-    date: str = None
+    date: str = ''
 
     def __new__(cls):
-        if not hasattr(cls, 'instance'):
-            cls.instance = super(Challenge, cls).__new__(cls)
+        """Override default class creation logic."""
+        if not hasattr(cls, 'instance'):  # NOQA : WPS421
+            cls.instance = super(Challenge, cls).__new__(cls)  # NOQA: WPS608
         return cls.instance
 
     @property
     def problem_link(self) -> str:
-        """Returns the link of the problem."""
+        """Return the link of the problem."""
         return 'https://leetcode.com/problems/{0}/'.format(
             self.title_slug,
         )
 
     @property
-    def tags(self) -> List[str]:
-        """Returns the link of the problem."""
+    def tags(self) -> List[Optional[str]]:
+        """Return the link of the problem."""
         tags = []
         for tag in self.raw_tags:
             tags.append(tag.get('name'))
         return tags
 
     def __str__(self):
-        """Returns the string rep of the class."""
-        return f"Title: {self.title}\nAcceptance Rate: {self.ac_rate}" \
-               f"\nDifficulty: {self.difficulty}\n" + \
-               f"id: {self.question_id}\nTags: {self.tags}"
+        """Return the string rep of the class."""
+        return 'Title: {0}\nAcceptance: {1}\nDifficulty: {2}\nID: {3}\nTags: {4}\n'.format(
+            self.title,
+            self.ac_rate,
+            self.difficulty,
+            self.question_id,
+            self.tags,
+        )

leeteasy/models/challenge.py

@@ -2,6 +2,7 @@
 
 from notifypy import Notify
 
+from leeteasy.models.challenge import Challenge
 from leeteasy.services.request_handler import RequestHandler
 from leeteasy.services.request_parser import RequestParser
 
@@ -11,11 +12,11 @@ class Notifier:
 
     target_difficulty = ['Easy']
     app_name = 'LeetEasy'
-    challenge = None
+    challenge: Challenge
 
     @classmethod
     def prepare_notification(cls):
-        """Prepares notification msg and triggers notification."""
+        """Prepare notification msg and triggers notification."""
         challenge_info = RequestHandler.get_challenge_info()
         cls.challenge = RequestParser.parse(challenge_info)
         if cls.challenge.difficulty in cls.target_difficulty:
@@ -27,14 +28,16 @@ def prepare_notification(cls):
     @classmethod
     def notify(cls):
         """Send desktop notification."""
-        app_name_with_subtitle = f'{cls.app_name} - Easy Problem Notification'
+        app_name_with_subtitle = '{0} - Easy Problem Notification'.format(cls.app_name)
         icon_path = Path(__file__).parent.parent / 'assets/leetcoin.png'
         notification = Notify(
             default_notification_application_name=app_name_with_subtitle,
             default_notification_icon=icon_path,
         )
         notification.message = cls.prepare_notification()
-        notification.title = f'{cls.app_name} - {cls.challenge.difficulty} ' \
-                             f'Problem Alert \U0001F514'
+        notification.title = '{0} - {1} Problem Alert \U0001F514'.format(
+            cls.app_name,
+            cls.challenge.difficulty,
+        )
         if notification.message:
             notification.send()

leeteasy/services/notification_service.py

@@ -1,5 +1,5 @@
 import time
-from typing import Union
+from typing import Dict
 
 import requests
 
@@ -9,23 +9,17 @@
 class RequestHandler:
     """Provides services for requesting leetcode API."""
 
-    @classmethod
-    def get_challenge_info(cls) -> Union[dict, None]:
-        """Gets daily challenge info from leetcode API."""
-        url = Constant.LEETCODE_API_ENDPOINT
-        query = Constant.DAILY_CODING_CHALLENGE_QUERY
-        max_retries = Constant.HTTP_CALL_RETRIES  # Change HTTP_CALL_RETRIES for more retries
+    url = Constant.LEETCODE_API_ENDPOINT
+    query = Constant.DAILY_CODING_CHALLENGE_QUERY
+    max_retries = Constant.HTTP_CALL_RETRIES
 
-        for i in range(max_retries):
+    @classmethod
+    def get_challenge_info(cls) -> Dict:
+        """Get daily challenge info from leetcode API."""
+        for iteration in range(cls.max_retries):
             try:
-                response = requests.post(url, json={'query': query})
+                response = requests.post(cls.url, json={'query': cls.query})
                 return response.json().get('data').get('activeDailyCodingChallengeQuestion')
             except Exception:
-                """
-                    On first hit sleep 10 minutes.
-                    On second hit sleep 20 minutes.
-                    On third hit sleep 30 minutes.
-                """
-                time.sleep(((i+1)*10)*60)
-        raise SystemExit(f"""Connection to leetcode failed and max retries have been exceeded.
-                             Total attempts made: {max_retries}. Try again""")
+                time.sleep(((iteration + 1) * 10) * 60)
+        raise SystemExit('Could not connect to the leetcode server.')

leeteasy/services/request_handler.py

@@ -1,23 +1,26 @@
+from typing import Dict
+
 from leeteasy.models.challenge import Challenge
 
 
 class RequestParser:
     """Parse responses of leetcode API."""
 
     @classmethod
-    def parse(cls, challenge_info: dict) -> Challenge:
+    def parse(cls, challenge_info: Dict) -> Challenge:
         """Parse API data ans update challenge model."""
-        return RequestParser._parse_challenge_info(challenge_info)
+        return cls._parse_challenge_info(challenge_info)
 
     @classmethod
     def _parse_challenge_info(cls, challenge_info) -> Challenge:
         """Parse and update challenge model."""
+        question = challenge_info.get('question')
         challenge = Challenge()
-        challenge.title = challenge_info.get('question').get('title')
-        challenge.ac_rate = challenge_info.get('question').get('acRate')
-        challenge.difficulty = challenge_info.get('question').get('difficulty')
-        challenge.question_id = challenge_info.get('question').get('frontendQuestionId')
+        challenge.title = question.get('title')
+        challenge.ac_rate = question.get('acRate')
+        challenge.difficulty = question.get('difficulty')
+        challenge.question_id = question.get('frontendQuestionId')
         challenge.date = challenge_info.get('date')
-        challenge.title_slug = challenge_info.get('question').get('titleSlug')
-        challenge.raw_tags = challenge_info.get('question').get('topicTags')
+        challenge.title_slug = question.get('titleSlug')
+        challenge.raw_tags = question.get('topicTags')
         return challenge

leeteasy/services/request_parser.py

@@ -8,7 +8,7 @@ class TimeValidator:
 
     @classmethod
     def validate(cls, time: str):
-        """Validates the given string is in valid time format."""
+        """Validate the given string is in valid time format."""
         try:
             return datetime.strptime(time, cls.time_format).time()
         except ValueError: