Drop 3.6 and 3.7 and support 3.11 and 3.12

.pylintrc

@@ -68,7 +68,13 @@ disable=fixme,
         superfluous-parens,
         bad-continuation,
         line-too-long,
-        bad-option-value
+        bad-option-value,
+        use-dict-literal,
+        missing-timeout,
+        unnecessary-dunder-call,
+        unnecessary-lambda-assignment,
+        broad-exception-raised,
+        consider-using-generator,
 
 
 # Enable the message, report, category or checker with the given id(s). You can
@@ -234,13 +240,6 @@ indent-string='    '
 # Maximum number of lines in a module
 max-module-lines=1000
 
-# List of optional constructs for which whitespace checking is disabled. `dict-
-# separator` is used to allow tabulation in dicts, etc.: {1  : 1,\n222: 2}.
-# `trailing-comma` allows a space between comma and closing bracket: (a, ).
-# `empty-line` allows space-only lines.
-no-space-check=trailing-comma,
-               dict-separator
-
 # Allow the body of a class to be on the same line as the declaration if body
 # contains single statement.
 single-line-class-stmt=no
@@ -415,7 +414,7 @@ max-bool-expr=5
 max-branches=15
 
 # Maximum number of locals for function / method body
-max-locals=15
+max-locals=18
 
 # Maximum number of parents for a class (see R0901).
 max-parents=7
@@ -467,10 +466,3 @@ known-standard-library=
 
 # Force import order to recognize a module as part of a third party library.
 known-third-party=enchant
-
-
-[EXCEPTIONS]
-
-# Exceptions that will emit a warning when being caught. Defaults to
-# "Exception"
-overgeneral-exceptions=Exception

.pylintrc310 → .pylintrc312

@@ -3,7 +3,7 @@
 # A comma-separated list of package or module names from where C extensions may
 # be loaded. Extensions are loading into the active Python interpreter and may
 # run arbitrary code.
-extension-pkg-whitelist=
+extension-pkg-allow-list=dash.html,dash.dash_table
 
 # Add files or directories to the blacklist. They should be base names, not
 # paths.
@@ -159,7 +159,13 @@ disable=invalid-name,
         line-too-long,
         super-with-arguments,
         raise-missing-from,
-        bad-option-value
+        bad-option-value,
+        use-dict-literal,
+        missing-timeout,
+        unnecessary-dunder-call,
+        unnecessary-lambda-assignment,
+        broad-exception-raised,
+        consider-using-generator,
 
 # Enable the message, report, category or checker with the given id(s). You can
 # either give multiple identifier separated by comma (,) or put this option
@@ -332,13 +338,6 @@ indent-string='    '
 # Maximum number of lines in a module.
 max-module-lines=1000
 
-# List of optional constructs for which whitespace checking is disabled. `dict-
-# separator` is used to allow tabulation in dicts, etc.: {1  : 1,\n222: 2}.
-# `trailing-comma` allows a space between comma and closing bracket: (a, ).
-# `empty-line` allows space-only lines.
-no-space-check=trailing-comma,
-               dict-separator
-
 # Allow the body of a class to be on the same line as the declaration if body
 # contains single statement.
 single-line-class-stmt=no
@@ -516,7 +515,7 @@ max-bool-expr=5
 max-branches=15
 
 # Maximum number of locals for function / method body.
-max-locals=15
+max-locals=18
 
 # Maximum number of parents for a class (see R0901).
 max-parents=7
@@ -574,4 +573,4 @@ known-third-party=enchant
 
 # Exceptions that will emit a warning when being caught. Defaults to
 # "Exception".
-overgeneral-exceptions=Exception
+overgeneral-exceptions=builtins.Exception

CHANGELOG.md

@@ -7,6 +7,7 @@ This project adheres to [Semantic Versioning](https://semver.org/).
 ## Changed
 
 - [#2734](https://github.com/plotly/dash/pull/2734) Configure CI for Python 3.10 [#1863](https://github.com/plotly/dash/issues/1863)
+- [#2735](https://github.com/plotly/dash/pull/2735) Configure CI for Python 3.8 and 3.12, drop support for Python 3.6 and Python 3.7 [#2736](https://github.com/plotly/dash/issues/2736)
 
 ## [2.15.0] - 2024-01-31
 

components/dash-core-components/package.json

@@ -15,7 +15,7 @@
     "private::format.black": "black dash_core_components_base/ tests/ setup.py",
     "private::format.eslint": "eslint src --fix",
     "private::format.prettier": "prettier --config .prettierrc --write src/**/*.js",
-    "private::lint.black": "node -e \"if ((process.env.PYVERSION || 'python310') !== 'python36'){process.exit(1)} \" || black --check dash_core_components_base/ tests/ setup.py",
+    "private::lint.black": "node -e \"if ((process.env.PYVERSION || 'python312') !== 'python38'){process.exit(1)} \" || black --check dash_core_components_base/ tests/ setup.py",
     "private::lint.eslint": "eslint src",
     "private::lint.flake8": "flake8 --exclude=dash_core_components,node_modules,venv",
     "private::lint.prettier": "prettier --config .prettierrc src/**/*.js --list-different",

components/dash-table/package.json

@@ -23,7 +23,7 @@
     "private::format.black": "black dash_table_base tests",
     "private::lint.ts": "eslint ./src ./tests",
     "private::lint.flake": "flake8 dash_table_base tests",
-    "private::lint.black": "node -e \"if ((process.env.PYVERSION || 'python310') !== 'python36'){process.exit(1)} \" || black --check dash_table_base tests",
+    "private::lint.black": "node -e \"if ((process.env.PYVERSION || 'python312') !== 'python38'){process.exit(1)} \" || black --check dash_table_base tests",
     "private::lint.prettier": "prettier --config .prettierrc \"{src,tests,demo}/**/*.{js,ts,tsx}\" --list-different",
     "private::test.python": "python -m unittest tests/unit/format_test.py",
     "private::test.unit": "karma start karma.conf.js --single-run",

components/dash-table/tests/selenium/conftest.py

@@ -1,14 +1,96 @@
 import platform
 import pytest
+from functools import wraps
+import inspect
 
 from dash.testing.browser import Browser
-from preconditions import preconditions
 from selenium.webdriver.common.action_chains import ActionChains
 from selenium.webdriver.common.by import By
 from selenium.webdriver.common.keys import Keys
 from selenium.webdriver.support import expected_conditions as EC
 from selenium.webdriver.support.wait import WebDriverWait
 
+
+class PreconditionError(TypeError):
+    pass
+
+
+def preconditions(*precs):
+    stripped_source = lambda obj: inspect.getsource(obj).strip()
+
+    if not precs:
+        # This edge case makes ``@preconditions()`` efficiently delegate
+        # to the wrapped function, which I anticipate will be useful
+        # for stubbing and code consistency in applications:
+        def null_decorator(f):
+            f.nopre = f  # Meet the .nopre interface requirement.
+            return f
+
+        return null_decorator
+
+    precinfo = []
+    for p in precs:
+        spec = inspect.getfullargspec(p)
+        if spec.varargs or spec.varkw:
+            raise PreconditionError(
+                (
+                    "Invalid precondition must not accept * nor ** args:\n" + "  {!s}\n"
+                ).format(stripped_source(p))
+            )
+
+        i = -len(spec.defaults or ())
+        if i == 0:
+            appargs, closureargs = spec.args, []
+        else:
+            appargs, closureargs = spec.args[:i], spec.args[i:]
+        precinfo.append((appargs, closureargs, p))
+
+    def decorate(f):
+        fspec = inspect.getfullargspec(f)
+
+        for (appargs, closureargs, p) in precinfo:
+            for apparg in appargs:
+                if apparg not in fspec.args:
+                    raise PreconditionError(
+                        (
+                            "Invalid precondition refers to unknown parameter {!r}:\n"
+                            + "  {!s}\n"
+                            + "Known parameters: {!r}\n"
+                        ).format(apparg, stripped_source(p), fspec.args)
+                    )
+            for carg in closureargs:
+                if carg in fspec.args:
+                    raise PreconditionError(
+                        (
+                            "Invalid precondition masks parameter {!r}:\n"
+                            + "  {!s}\n"
+                            + "Known parameters: {!r}\n"
+                        ).format(carg, stripped_source(p), fspec.args)
+                    )
+
+        @wraps(f)
+        def g(*a, **kw):
+            args = inspect.getcallargs(f, *a, **kw)
+            for (appargs, _, p) in precinfo:
+                if not p(*[args[aa] for aa in appargs]):
+                    raise PreconditionError(
+                        "Precondition failed in call {!r}{}:\n  {!s}\n".format(
+                            g,
+                            inspect.formatargvalues(
+                                fspec.args, fspec.varargs, fspec.varkw, args
+                            ),
+                            stripped_source(p),
+                        )
+                    )
+
+            return f(*a, **kw)
+
+        g.nopre = f
+        return g
+
+    return decorate
+
+
 _validate_col = lambda col: (isinstance(col, str) and len(col) > 0) or (
     isinstance(col, int) and col >= 0
 )

dash/_callback.py

@@ -35,6 +35,10 @@
 from ._callback_context import context_value
 
 
+def _invoke_callback(func, *args, **kwargs):  # used to mark the frame for the debugger
+    return func(*args, **kwargs)  # %% callback invoked %%
+
+
 class NoUpdate:
     def to_plotly_json(self):  # pylint: disable=no-self-use
         return {"_dash_no_update": "_dash_no_update"}
@@ -438,8 +442,7 @@ def add_context(*args, **kwargs):
                 if output_value is callback_manager.UNDEFINED:
                     return to_json(response)
             else:
-                # don't touch the comment on the next line - used by debugger
-                output_value = func(*func_args, **func_kwargs)  # %% callback invoked %%
+                output_value = _invoke_callback(func, *func_args, **func_kwargs)
 
             if NoUpdate.is_no_update(output_value):
                 raise PreventUpdate

dash/_jupyter.py

@@ -8,7 +8,6 @@
 import sys
 import threading
 import time
-import traceback
 
 from typing_extensions import Literal
 
@@ -37,12 +36,18 @@
 
 
 def _get_skip(error: Exception):
-    tb = traceback.format_exception(type(error), error, error.__traceback__)
-    skip = 0
-    for i, line in enumerate(tb):
-        if "%% callback invoked %%" in line:
-            skip = i + 1
-            break
+    from dash._callback import (  # pylint: disable=import-outside-toplevel
+        _invoke_callback,
+    )
+
+    tb = error.__traceback__
+    skip = 1
+    while tb.tb_next is not None:
+        skip += 1
+        tb = tb.tb_next
+        if tb.tb_frame.f_code is _invoke_callback.__code__:
+            return skip
+
     return skip
 
 

dash/dash.py

@@ -146,32 +146,44 @@ def _get_traceback(secret, error: Exception):
     except ImportError:
         tbtools = None
 
-    def _get_skip(text, divider=2):
-        skip = 0
-        for i, line in enumerate(text):
-            if "%% callback invoked %%" in line:
-                skip = int((i + 1) / divider)
-                break
+    def _get_skip(error):
+        from dash._callback import (  # pylint: disable=import-outside-toplevel
+            _invoke_callback,
+        )
+
+        tb = error.__traceback__
+        skip = 1
+        while tb.tb_next is not None:
+            skip += 1
+            tb = tb.tb_next
+            if tb.tb_frame.f_code is _invoke_callback.__code__:
+                return skip
+
         return skip
 
+    def _do_skip(error):
+        from dash._callback import (  # pylint: disable=import-outside-toplevel
+            _invoke_callback,
+        )
+
+        tb = error.__traceback__
+        while tb.tb_next is not None:
+            if tb.tb_frame.f_code is _invoke_callback.__code__:
+                return tb.tb_next
+            tb = tb.tb_next
+        return error.__traceback__
+
     # werkzeug<2.1.0
     if hasattr(tbtools, "get_current_traceback"):
-        tb = tbtools.get_current_traceback()
-        skip = _get_skip(tb.plaintext.splitlines())
-        return tbtools.get_current_traceback(skip=skip).render_full()
+        return tbtools.get_current_traceback(skip=_get_skip(error)).render_full()
 
     if hasattr(tbtools, "DebugTraceback"):
-        tb = tbtools.DebugTraceback(error)  # pylint: disable=no-member
-        skip = _get_skip(tb.render_traceback_text().splitlines())
-
         # pylint: disable=no-member
-        return tbtools.DebugTraceback(error, skip=skip).render_debugger_html(
-            True, secret, True
-        )
+        return tbtools.DebugTraceback(
+            error, skip=_get_skip(error)
+        ).render_debugger_html(True, secret, True)
 
-    tb = traceback.format_exception(type(error), error, error.__traceback__)
-    skip = _get_skip(tb, 1)
-    return tb[0] + "".join(tb[skip:])
+    return "".join(traceback.format_exception(type(error), error, _do_skip(error)))
 
 
 # Singleton signal to not update an output, alternative to PreventUpdate

dash/testing/browser.py

@@ -603,7 +603,7 @@ def get_logs(self):
 
         Chrome only
         """
-        if self.driver.name.lower() == "chrome":
+        if self._browser == "chrome":
             return [
                 entry
                 for entry in self.driver.get_log("browser")
@@ -614,7 +614,7 @@ def get_logs(self):
 
     def reset_log_timestamp(self):
         """reset_log_timestamp only work with chrome webdriver."""
-        if self.driver.name.lower() == "chrome":
+        if self._browser == "chrome":
             entries = self.driver.get_log("browser")
             if entries:
                 self._last_ts = entries[-1]["timestamp"]

package.json

@@ -11,10 +11,10 @@
     "private::cibuild.renderer": "cd dash/dash-renderer && renderer build",
     "private::build.renderer": "cd dash/dash-renderer && renderer build",
     "private::build.jupyterlab": "cd \\@plotly/dash-jupyterlab && jlpm install && jlpm build:pack",
-    "private::lint.black": "node -e \"if ((process.env.PYVERSION || 'python310') !== 'python36'){process.exit(1)} \" || black dash tests --exclude metadata_test.py --check",
+    "private::lint.black": "node -e \"if ((process.env.PYVERSION || 'python312') !== 'python38'){process.exit(1)} \" || black dash tests --exclude metadata_test.py --check",
     "private::lint.flake8": "flake8 --exclude=metadata_test.py dash tests",
-    "private::lint.pylint-dash": "PYLINTRC=${PYLINTRC:=.pylintrc39} && pylint dash setup.py --rcfile=$PYLINTRC",
-    "private::lint.pylint-tests": "PYLINTRC=${PYLINTRC:=.pylintrc39} && pylint tests/unit tests/integration -d all --rcfile=$PYLINTRC",
+    "private::lint.pylint-dash": "PYLINTRC=${PYLINTRC:=.pylintrc312} && pylint dash setup.py --rcfile=$PYLINTRC",
+    "private::lint.pylint-tests": "PYLINTRC=${PYLINTRC:=.pylintrc312} && pylint tests/unit tests/integration -d all -e C0410,C0413,W0109 --rcfile=$PYLINTRC",
     "private::lint.renderer": "cd dash/dash-renderer && npm run lint",
     "private::test.setup-components": "cd \\@plotly/dash-test-components && npm ci && npm run build",
     "private::test.setup-nested": "cd \\@plotly/dash-generator-test-component-nested && npm ci && npm run build",