Fix oppia#15567: Python Interpreter Migration from 3.7.10 to 3.8.12 (o…

…ppia#15508)

.github/workflows/backend_associated_test_file_check.yml

@@ -20,7 +20,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-python@v2
         with:
-          python-version: '3.7'
+          python-version: '3.8.12'
           architecture: 'x64'
       - uses: ./.github/actions/merge
       - name: Cache node modules

.github/workflows/backend_tests.yml

@@ -21,7 +21,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-python@v2
         with:
-          python-version: '3.7'
+          python-version: '3.8.12'
           architecture: 'x64'
       - name: Cache node modules
         uses: actions/cache@v2
@@ -65,7 +65,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-python@v2
         with:
-          python-version: '3.7'
+          python-version: '3.8.12'
           architecture: 'x64'
       - name: Cache node modules
         uses: actions/cache@v2

.github/workflows/e2e_additional_editor_and_player.yml

@@ -19,7 +19,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-python@v2
         with:
-          python-version: '3.7'
+          python-version: '3.8.12'
           architecture: 'x64'
       - uses: ./.github/actions/merge
       - name: Cache node modules

.github/workflows/e2e_coverage_and_typescript_tests.yml

@@ -19,7 +19,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-python@v2
         with:
-          python-version: '3.7'
+          python-version: '3.8.12'
           architecture: 'x64'
       - uses: ./.github/actions/merge
       - name: Cache node modules

.github/workflows/e2e_creator_learner_dashboard_and_editor_tabs.yml

@@ -19,7 +19,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-python@v2
         with:
-          python-version: '3.7'
+          python-version: '3.8.12'
           architecture: 'x64'
       - uses: ./.github/actions/merge
       - name: Cache node modules

.github/workflows/e2e_history_statistics_tabs_and_extensions.yml

@@ -19,7 +19,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-python@v2
         with:
-          python-version: '3.7'
+          python-version: '3.8.12'
           architecture: 'x64'
       - uses: ./.github/actions/merge
       - name: Cache node modules

.github/workflows/e2e_learner_flow_skill_editor_and_embedding.yml

@@ -19,7 +19,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-python@v2
         with:
-          python-version: '3.7'
+          python-version: '3.8.12'
           architecture: 'x64'
       - uses: ./.github/actions/merge
       - name: Cache node modules

.github/workflows/e2e_miscellaneous_tests.yml

@@ -19,7 +19,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-python@v2
         with:
-          python-version: '3.7'
+          python-version: '3.8.12'
           architecture: 'x64'
       - uses: ./.github/actions/merge
       - name: Cache node modules

.github/workflows/e2e_other_tests.yml

@@ -19,7 +19,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-python@v2
         with:
-          python-version: '3.7'
+          python-version: '3.8.12'
           architecture: 'x64'
       - uses: ./.github/actions/merge
       - name: Cache node modules

.github/workflows/e2e_topic_tests.yml

@@ -19,7 +19,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-python@v2
         with:
-          python-version: '3.7'
+          python-version: '3.8.12'
           architecture: 'x64'
       - uses: ./.github/actions/merge
       - name: Cache node modules

.github/workflows/e2e_translation_classroom_and_core_features.yml

@@ -19,7 +19,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-python@v2
         with:
-          python-version: '3.7'
+          python-version: '3.8.12'
           architecture: 'x64'
       - uses: ./.github/actions/merge
       - name: Cache node modules

.github/workflows/e2e_user_features_and_library.yml

@@ -19,7 +19,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-python@v2
         with:
-          python-version: '3.7'
+          python-version: '3.8.12'
           architecture: 'x64'
       - uses: ./.github/actions/merge
       - name: Cache node modules

.github/workflows/e2e_user_profile.yml

@@ -19,7 +19,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-python@v2
         with:
-          python-version: '3.7'
+          python-version: '3.8.12'
           architecture: 'x64'
       - uses: ./.github/actions/merge
       - name: Cache node modules

.github/workflows/eslint_tests.yml

@@ -20,7 +20,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-python@v2
         with:
-          python-version: '3.7'
+          python-version: '3.8.12'
           architecture: 'x64'
       - uses: ./.github/actions/merge
       - name: Cache node modules

.github/workflows/frontend_tests.yml

@@ -49,7 +49,7 @@ jobs:
           echo $GITHUB_WORKSPACE
       - uses: actions/setup-python@v2
         with:
-          python-version: '3.7'
+          python-version: '3.8.12'
           architecture: 'x64'
       - uses: ./.github/actions/merge
       - name: Cache node modules

.github/workflows/lighthouse_accessibility.yml

@@ -18,9 +18,9 @@ jobs:
         shard: [1, 2]
     steps:
       - uses: actions/checkout@v2
-      - uses: actions/setup-python@v1
+      - uses: actions/setup-python@v2
         with:
-          python-version: '3.7'
+          python-version: '3.8.12'
           architecture: 'x64'
       - uses: ./.github/actions/merge
       # Caching is disabled to avoid poisoning our cache with the

.github/workflows/lighthouse_performance.yml

@@ -18,9 +18,9 @@ jobs:
         shard: [1, 2]
     steps:
       - uses: actions/checkout@v2
-      - uses: actions/setup-python@v1
+      - uses: actions/setup-python@v2
         with:
-          python-version: '3.7'
+          python-version: '3.8.12'
           architecture: 'x64'
       - uses: ./.github/actions/merge
       - name: Cache node modules

.github/workflows/lint.yml

@@ -20,7 +20,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-python@v2
         with:
-          python-version: '3.7'
+          python-version: '3.8.12'
           architecture: 'x64'
       - uses: ./.github/actions/merge
       - name: Cache node modules

.github/workflows/pending-review-notification.yml

@@ -20,7 +20,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-python@v2
         with:
-          python-version: '3.7'
+          python-version: '3.8.12'
           architecture: 'x64'
       - uses: DubeySandeep/pending-review-notification@v1
         with:

.github/workflows/python_type_checks.yml

@@ -20,7 +20,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-python@v2
         with:
-          python-version: '3.7'
+          python-version: '3.8.12'
           architecture: 'x64'
       - name: Install python 2 for GAE
         run: |

.pylintrc

@@ -111,6 +111,8 @@ disable=abstract-method,
         not-context-manager,
         redefined-variable-type,
         redundant-returns-doc,
+# TODO(#12912): Python interpreter migration to 3.8.12 causing failing lint check. Fix it later.
+        redundant-u-string-prefix,
         too-many-arguments,
         too-many-boolean-expressions,
         too-many-branches,

app_dev.yaml

@@ -1,4 +1,4 @@
-runtime: python37
+runtime: python38
 instance_class: F2
 # The "version" line is added here so that MR jobs can run locally (see issue
 # #6534 on oppia/oppia).

core/controllers/base.py

@@ -799,7 +799,10 @@ def _create_token(cls, user_id, issued_on):
         # Round time to seconds.
         issued_on = str(int(issued_on))
 
-        digester = hmac.new(CSRF_SECRET.value.encode('utf-8'))
+        digester = hmac.new(
+            key=CSRF_SECRET.value.encode('utf-8'),
+            digestmod='md5'
+        )
         digester.update(user_id.encode('utf-8'))
         digester.update(b':')
         digester.update(issued_on.encode('utf-8'))

core/domain/activity_services_test.py

@@ -27,8 +27,7 @@
 from core.domain import user_services
 from core.tests import test_utils
 
-from typing import List
-from typing_extensions import Final
+from typing import Final, List
 
 
 class ActivityServicesTests(test_utils.GenericTestBase):

core/domain/app_feedback_report_domain.py

@@ -27,8 +27,7 @@
 from core.domain import story_domain
 from core.domain import topic_domain
 
-from typing import Any, Dict, List, Match, Optional, Union
-from typing_extensions import TypedDict
+from typing import Any, Dict, List, Match, Optional, TypedDict, Union
 
 # TODO(#14537): Refactor this file and remove imports marked
 # with 'invalid-import-from'.

core/domain/app_feedback_report_services.py

@@ -26,8 +26,7 @@
 from core.domain import app_feedback_report_domain
 from core.platform import models
 
-from typing import Dict, List, Optional, Sequence, cast, overload
-from typing_extensions import Literal
+from typing import Dict, List, Literal, Optional, Sequence, cast, overload
 
 MYPY = False
 if MYPY: # pragma: no cover

core/domain/auth_domain.py

@@ -22,8 +22,7 @@
 
 from core import utils
 
-from typing import Any, Optional
-from typing_extensions import TypedDict
+from typing import Any, Optional, TypedDict
 
 # Auth ID refers to an identifier that links many Identity Providers to a single
 # user. For example, an individual user's Facebook, Google, and Apple profiles

core/domain/blog_domain.py

@@ -24,8 +24,7 @@
 from core import utils
 from core.constants import constants
 
-from typing import List, Optional
-from typing_extensions import TypedDict
+from typing import List, Optional, TypedDict
 
 from core.domain import html_cleaner  # pylint: disable=invalid-import-from # isort:skip
 

core/domain/blog_services.py

@@ -31,8 +31,8 @@
 from core.domain import user_domain
 from core.platform import models
 
-from typing import Callable, List, Optional, Sequence, Tuple, overload
-from typing_extensions import Literal, TypedDict
+from typing import (
+    Callable, List, Literal, Optional, Sequence, Tuple, TypedDict, overload)
 
 MYPY = False
 if MYPY: # pragma: no cover

core/domain/caching_services.py

@@ -30,8 +30,9 @@
 from core.domain import topic_domain
 from core.platform import models
 
-from typing import Callable, Dict, List, Mapping, Optional, Union, overload
-from typing_extensions import Final, Literal, TypedDict
+from typing import (
+    Callable, Dict, Final, List, Literal, Mapping, Optional, TypedDict,
+    Union, overload)
 
 MYPY = False
 if MYPY: # pragma: no cover

core/domain/calculation_registry.py

@@ -22,8 +22,7 @@
 
 from extensions.answer_summarizers import models
 
-from typing import Callable, Dict, overload
-from typing_extensions import Literal
+from typing import Callable, Dict, Literal, overload
 
 
 class Registry:

core/domain/classifier_domain.py

@@ -23,8 +23,7 @@
 from core import utils
 from core.domain import state_domain
 
-from typing import Dict, List
-from typing_extensions import TypedDict
+from typing import Dict, List, TypedDict
 
 
 class ClassifierTrainingJobDict(TypedDict):

core/domain/classifier_services.py

@@ -31,8 +31,7 @@
 from core.domain import state_domain
 from core.platform import models
 
-from typing import Dict, List, Optional, Sequence
-from typing_extensions import TypedDict
+from typing import Dict, List, Optional, Sequence, TypedDict
 
 MYPY = False
 if MYPY: # pragma: no cover

core/domain/classroom_config_domain.py

@@ -28,8 +28,7 @@
 from core import utils
 from core.constants import constants
 
-from typing import Dict, List
-from typing_extensions import TypedDict
+from typing import Dict, List, TypedDict
 
 
 class ClassroomDict(TypedDict):

core/domain/classroom_config_services.py

@@ -27,8 +27,7 @@
 from core.domain import classroom_config_domain
 from core.platform import models
 
-from typing import Dict, List, Optional, overload
-from typing_extensions import Literal
+from typing import Dict, List, Literal, Optional, overload
 
 MYPY = False
 if MYPY: # pragma: no cover

core/domain/collection_domain.py

@@ -33,8 +33,7 @@
 from core.constants import constants
 from core.domain import change_domain
 
-from typing import Dict, List, Optional, cast
-from typing_extensions import Final, Literal, TypedDict
+from typing import Dict, Final, List, Literal, Optional, TypedDict, cast
 
 # Do not modify the values of these constants. This is to preserve backwards
 # compatibility with previous change dicts.

core/domain/collection_services.py

@@ -47,9 +47,8 @@
 from core.platform import models
 
 from typing import (
-    Dict, Iterable, List, Mapping, Optional, Sequence, Tuple, cast, overload
-)
-from typing_extensions import Final, Literal, TypedDict
+    Dict, Final, Iterable, List, Literal, Mapping, Optional, Sequence, Tuple,
+    TypedDict, cast, overload)
 
 MYPY = False
 if MYPY: # pragma: no cover

core/domain/collection_services_test.py

@@ -33,8 +33,7 @@
 from core.platform import models
 from core.tests import test_utils
 
-from typing import Dict, List, Optional
-from typing_extensions import Final
+from typing import Dict, Final, List, Optional
 
 MYPY = False
 if MYPY: # pragma: no cover

core/domain/config_domain.py

@@ -23,8 +23,7 @@
 from core.constants import constants
 from core.domain import change_domain
 
-from typing import Any, Dict, List, Optional, Sequence, Union
-from typing_extensions import TypedDict
+from typing import Any, Dict, List, Optional, Sequence, TypedDict, Union
 
 from core.domain import caching_services  # pylint: disable=invalid-import-from # isort:skip
 from core.platform import models  # pylint: disable=invalid-import-from # isort:skip

core/domain/draft_upgrade_services_test.py

@@ -27,8 +27,7 @@
 from core.domain import state_domain
 from core.tests import test_utils
 
-from typing import Dict
-from typing_extensions import Final
+from typing import Dict, Final
 
 
 class DraftUpgradeUnitTests(test_utils.GenericTestBase):