Add black lint (#483)

* Fix #482

* apply black codestyle

* modify flake8 settings to be compatible with Black

* change job name to be less ambiguous

* integrate black into ci as a step reather than a standalone job and add it to the dev deps

* Update .flake8

Use better formatting of necessary changes to comply with Black codestyle

Co-authored-by: Yaacov Zamir <kobi.zamir@gmail.com>

* add W508 to ignored rules

* fix typo

* fix yet another typo...

---------

Co-authored-by: Yaacov Zamir <kobi.zamir@gmail.com>

.flake8

@@ -1,3 +1,8 @@
 [flake8]
 show_source = True
 statistics = True
+
+# E501: line to long.
+# E203: whitespace before ':' to accept black code style
+# W503: line break before binary operator
+ignore = E501,E203,W503

.github/workflows/ci.yml

@@ -17,5 +17,7 @@ jobs:
         pip install -r requirements-dev.txt
     - name: Lint
       run: flake8 --show-source --statistics
+    - name: Blint
+      run: black --check --diff .
     - name: Run tests
       run: pytest

.travis.yml

@@ -9,4 +9,5 @@ install:
 
 script:
     - flake8
+    - black
     - pytest --check-links --ignore=docs/course_materials/reveal

Pipfile

@@ -7,6 +7,7 @@ name = "pypi"
 
 [dev-packages]
 
+black = "*"
 flake8 = "*"
 pytest = "*"
 pytest-coverage = "*"

classroom/connect_service.py

@@ -6,9 +6,11 @@
 
 
 # If modifying these scopes, delete the file token.pickle.
-SCOPES = ['https://www.googleapis.com/auth/classroom.rosters',
-          'https://www.googleapis.com/auth/classroom.courses',
-          'https://www.googleapis.com/auth/classroom.topics']
+SCOPES = [
+    "https://www.googleapis.com/auth/classroom.rosters",
+    "https://www.googleapis.com/auth/classroom.courses",
+    "https://www.googleapis.com/auth/classroom.topics",
+]
 
 
 def create_service():
@@ -20,21 +22,19 @@ def create_service():
     # The file token.pickle stores the user's access and refresh tokens, and is
     # created automatically when the authorization flow completes for the first
     # time.
-    if os.path.exists('token.pickle'):
-        with open('token.pickle', 'rb') as token:
+    if os.path.exists("token.pickle"):
+        with open("token.pickle", "rb") as token:
             creds = pickle.load(token)
     # If there are no (valid) credentials available, let the user log in.
     if not creds or not creds.valid:
         if creds and creds.expired and creds.refresh_token:
             creds.refresh(Request())
         else:
-            flow = InstalledAppFlow.from_client_secrets_file(
-                'credentials.json', SCOPES)
+            flow = InstalledAppFlow.from_client_secrets_file("credentials.json", SCOPES)
             creds = flow.run_local_server(port=0)
         # Save the credentials for the next run
-        with open('token.pickle', 'wb') as token:
+        with open("token.pickle", "wb") as token:
             pickle.dump(creds, token)
 
-    service = build('classroom', 'v1', credentials=creds,
-                    cache_discovery=False)
+    service = build("classroom", "v1", credentials=creds, cache_discovery=False)
     return service

classroom/content_edit.py

@@ -6,21 +6,21 @@
 def print_topics(service, course_id):
     # Call the Classroom API
     results = service.courses().topics().list(courseId=course_id).execute()
-    topics = results.get('topic', [])
+    topics = results.get("topic", [])
 
     if not topics:
-        print('No topics found.')
+        print("No topics found.")
     else:
-        print('Topics:')
+        print("Topics:")
         for topic in topics:
             print(f"Title: {topic['name']}, ID: {topic['topicId']}")
 
 
 def create_topic(service, title, course_id):
-    topic = {'name': title}
-    new_topic = service.courses().topics().create(
-                                            courseId=course_id,
-                                            body=topic).execute()
+    topic = {"name": title}
+    new_topic = (
+        service.courses().topics().create(courseId=course_id, body=topic).execute()
+    )
     print(f"Topic created: {new_topic['name']} {new_topic['topicId']}")
 
 

classroom/course_creator.py

@@ -6,39 +6,43 @@
 def print_courses(service):
     # Call the Classroom API
     results = service.courses().list(pageSize=10).execute()
-    courses = results.get('courses', [])
+    courses = results.get("courses", [])
 
     if not courses:
-        print('No courses found.')
+        print("No courses found.")
     else:
-        print('Courses:')
+        print("Courses:")
         for course in courses:
             print(f"Title: {course['name']}, ID: {course['id']}")
 
 
 def create_course(service, course_name):
-    course_data = {'name': course_name,
-                   'descriptionHeading': 'Welcome to ' + course_name,
-                   'description': ("We'll be learning about coding from a " +
-                                   "combination of lectures, course work, " +
-                                   "and home projects. Let's start!"),
-                   'ownerId': 'me',
-                   'courseState': 'PROVISIONED'}
+    course_data = {
+        "name": course_name,
+        "descriptionHeading": "Welcome to " + course_name,
+        "description": (
+            "We'll be learning about coding from a "
+            + "combination of lectures, course work, "
+            + "and home projects. Let's start!"
+        ),
+        "ownerId": "me",
+        "courseState": "PROVISIONED",
+    }
     course = service.courses().create(body=course_data).execute()
     print(f"Course created: {course.get('name')} {course.get('id')}")
-    return course.get('id')
+    return course.get("id")
 
 
 def load_list(list_path):
-    '''
+    """
     Load student/teacher list from csv file.
-    '''
+    """
     if not os.path.exists(list_path):
         print(f"This path does not exist: {list_path}.")
         return None
-    with open(list_path, mode='r') as csv_file:
+    with open(list_path, mode="r") as csv_file:
         mail_list = []
-        csv_reader = csv.reader(csv_file, delimiter=',')
+        csv_reader = csv.reader(csv_file, delimiter=",")
         if csv_reader is None:
             print("The list is empty.")
             return mail_list
@@ -59,25 +63,25 @@ def create_invitation(service, args, invite_type):
     Function:
     - Creates invitations using the mail list.
     """
-    if invite_type == 'STUDENT':
+    if invite_type == "STUDENT":
         list_path = args.student_list
     else:
         list_path = args.teacher_list
     mail_list = load_list(list_path)
     if len(mail_list) > 0:
         for mail in mail_list:
             invitation = {
-                'courseId': args.id,
-                'role': invite_type,
-                'userId': mail,
+                "courseId": args.id,
+                "role": invite_type,
+                "userId": mail,
             }
             try:
                 service.invitations().create(body=invitation).execute()
-                print(f'Invitation was sent to {mail}')
+                print(f"Invitation was sent to {mail}")
             except errors.HttpError as e:
-                if '409' in str(e):
-                    print(f'Not added, {mail} has a pending invitation.')
-                elif '400' in str(e):
-                    print(f'Not added, {mail} already listed in course.')
+                if "409" in str(e):
+                    print(f"Not added, {mail} has a pending invitation.")
+                elif "400" in str(e):
+                    print(f"Not added, {mail} already listed in course.")
                 else:
-                    print('No permissions or wrong course ID.')
+                    print("No permissions or wrong course ID.")

classroom/rose_class.py

@@ -6,75 +6,97 @@
 
 
 def main():
-    '''
+    """
     Getting user input and preforming corresponding actions.
     Available functions:
     - Create course/topic in classroom.
     - Print existing courses/topics.
     - Update teacher list.
     - Update student list.
-    '''
+    """
 
     logging.basicConfig(level=logging.INFO)
-    parser = argparse.ArgumentParser(description='ROSE Classroom')
-    parser.add_argument('--course', action='store_true',
-                        help='A flag for course actions, stores True. '
-                             'Has to be followed by an action as --create. '
-                             'If not specified, will be False.')
-    parser.add_argument('--topic', action='store_true',
-                        help='A flag for topic actions, stores True. '
-                             'Has to be followed by an action as --create. '
-                             'If not specified, will be False.')
-    parser.add_argument('--create', '-c', dest='name',
-                        help='Creating a new instance using given name. '
-                             'If not specified, cannot be created. '
-                             'Follows an instance type as --course. '
-                             'For creating Topics, Assignments and more '
-                             'please specify the course/topic id using -i.')
-    parser.add_argument('--print', '-p', action="store_true",
-                        help='Printing existing instances.')
-    parser.add_argument('--teacher_list', '-t', dest='teacher_list',
-                        help='Adding teachers using a list, '
-                             'expects a csv file. '
-                             'If course exists, '
-                             'please provide course ID using -i.')
-    parser.add_argument('--student_list', '-s', dest='student_list',
-                        help='Adding students using a list, '
-                             'expects csv file. '
-                             'If course exists, '
-                             'please provide course ID using -i.')
-    parser.add_argument('--id', '-i',
-                        help='Specifies an instance id. Can be used for '
-                             'adding student lists or teacher lists, adding '
-                             'Topics, Homework and more. '
-                             'Please specify the needed action. '
-                             'Use combined with instance type as --course.')
+    parser = argparse.ArgumentParser(description="ROSE Classroom")
+    parser.add_argument(
+        "--course",
+        action="store_true",
+        help="A flag for course actions, stores True. "
+        "Has to be followed by an action as --create. "
+        "If not specified, will be False.",
+    )
+    parser.add_argument(
+        "--topic",
+        action="store_true",
+        help="A flag for topic actions, stores True. "
+        "Has to be followed by an action as --create. "
+        "If not specified, will be False.",
+    )
+    parser.add_argument(
+        "--create",
+        "-c",
+        dest="name",
+        help="Creating a new instance using given name. "
+        "If not specified, cannot be created. "
+        "Follows an instance type as --course. "
+        "For creating Topics, Assignments and more "
+        "please specify the course/topic id using -i.",
+    )
+    parser.add_argument(
+        "--print", "-p", action="store_true", help="Printing existing instances."
+    )
+    parser.add_argument(
+        "--teacher_list",
+        "-t",
+        dest="teacher_list",
+        help="Adding teachers using a list, "
+        "expects a csv file. "
+        "If course exists, "
+        "please provide course ID using -i.",
+    )
+    parser.add_argument(
+        "--student_list",
+        "-s",
+        dest="student_list",
+        help="Adding students using a list, "
+        "expects csv file. "
+        "If course exists, "
+        "please provide course ID using -i.",
+    )
+    parser.add_argument(
+        "--id",
+        "-i",
+        help="Specifies an instance id. Can be used for "
+        "adding student lists or teacher lists, adding "
+        "Topics, Homework and more. "
+        "Please specify the needed action. "
+        "Use combined with instance type as --course.",
+    )
 
     args = parser.parse_args()
 
-    '''Set up the service to google classroom'''
+    """Set up the service to google classroom"""
     service = connect_service.create_service()
 
     if args.id and len(args.id) < 12:
-        print('Please check the ID specified and try again.')
+        print("Please check the ID specified and try again.")
     elif args.course and not args.topic:
         if args.name:
             args.id = course_creator.create_course(service, args.name)
-            print(f'The id returned {args.id}')
+            print(f"The id returned {args.id}")
         elif args.print:
             course_creator.print_courses(service)
         elif not args.id:
-            print('Please use --help to inspect the possible actions.')
+            print("Please use --help to inspect the possible actions.")
         else:
             if args.teacher_list:
-                course_creator.create_invitation(service, args, 'TEACHER')
+                course_creator.create_invitation(service, args, "TEACHER")
 
             if args.student_list:
-                course_creator.create_invitation(service, args, 'STUDENT')
+                course_creator.create_invitation(service, args, "STUDENT")
 
             no_list = args.student_list is None and args.teacher_list is None
-            if (no_list):
-                print('Please use -h to check the available actions.')
+            if no_list:
+                print("Please use -h to check the available actions.")
     elif args.topic:
         if args.course and args.id:
             if args.print:
@@ -83,8 +105,8 @@ def main():
             if args.name:
                 content_edit.create_topic(service, args.name, args.id)
         else:
-            print('Wrong action')
+            print("Wrong action")
 
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     main()

docs/course_materials/exercises/09_Extra/class_exercise_1_solution.py

@@ -1,16 +1,15 @@
-
 def joing_files(file_name1, file_name2, out_file_name):
     """
     Reads the first two files, joins them and writes the data to the third one.
     """
     try:
-        file1 = open(file_name1, 'r').read()
-        file2 = open(file_name2, 'r').read()
-        open(out_file_name, 'w').write(file1 + file2)
-        print('The files were joined successfully!')
+        file1 = open(file_name1, "r").read()
+        file2 = open(file_name2, "r").read()
+        open(out_file_name, "w").write(file1 + file2)
+        print("The files were joined successfully!")
     except Exception as e:
         print(e)
-        print('Reading or writing error with one of the files!')
+        print("Reading or writing error with one of the files!")
 
 
 file_name_1 = input("Enter the first file name: ")

docs/course_materials/exercises/09_Extra/class_exercise_2_solution.py

@@ -3,4 +3,4 @@
 end_of_the_year = datetime(2020, 12, 31)
 today = datetime.now()
 time_to_the_end_of_the_year = end_of_the_year - today
-print('There are {} days left…'.format(time_to_the_end_of_the_year.days))
+print("There are {} days left…".format(time_to_the_end_of_the_year.days))

docs/course_materials/exercises/test_exercises/01_Linux/check_class_exercise_1.py

@@ -1,5 +1,5 @@
-exercise_commands = ['mkdir', 'tree']
+exercise_commands = ["mkdir", "tree"]
 
-exercise_paths = ['test', 'test/tmp']
+exercise_paths = ["test", "test/tmp"]
 
 exercise_deleted_paths = []

docs/course_materials/exercises/test_exercises/01_Linux/check_class_exercise_2.1.py

@@ -1,5 +1,5 @@
-exercise_commands = ['vim', 'cp']
+exercise_commands = ["vim", "cp"]
 
-exercise_paths = ['roses.txt']
+exercise_paths = ["roses.txt"]
 
 exercise_deleted_paths = []