Bump default MyPy version to 0.800 (pantsbuild#11506)

3rdparty/python/constraints.txt

@@ -1,4 +1,4 @@
-# Generated by build-support/bin/generate_lockfile.sh on Fri Jan 22 05:13:08 PM PST 2021
+# Generated by build-support/bin/generate_lockfile.sh on Sat Jan 30 06:19:07 MST 2021
 ansicolors==1.1.8
 attrs==20.3.0
 beautifulsoup4==4.6.3
@@ -11,7 +11,7 @@ freezegun==1.0.0
 idna==2.10
 iniconfig==1.1.1
 monotonic==1.5
-mypy==0.782
+mypy==0.800
 mypy-extensions==0.4.3
 packaging==20.8
 pex==2.1.28
@@ -23,7 +23,7 @@ pycparser==2.20
 pyOpenSSL==20.0.1
 pyparsing==2.4.7
 pystache==0.5.4
-pytest==6.2.1
+pytest==6.2.2
 python-dateutil==2.8.1
 PyYAML==5.4.1
 requests==2.25.1
@@ -33,4 +33,4 @@ six==1.15.0
 toml==0.10.2
 typed-ast==1.4.2
 typing-extensions==3.7.4.2
-urllib3==1.26.2
+urllib3==1.26.3

3rdparty/python/requirements.txt

@@ -11,7 +11,7 @@ freezegun==1.0.0
 #     .value_history.ranked_values[-1].value
 #   '
 #
-mypy==0.782
+mypy==0.800
 
 packaging==20.8
 pathspec==0.8.0

build-support/bin/generate_docs.py

@@ -194,7 +194,7 @@ def process_targets_input(cls, help_info: Dict) -> Dict[str, Dict[str, Any]]:
                 field["default_or_required"] = (
                     "required" if field["required"] else f"default: <code>{default_str}</code>"
                 )
-            target["fields"] = sorted(target["fields"], key=lambda fld: fld["alias"])
+            target["fields"] = sorted(target["fields"], key=lambda fld: cast(str, fld["alias"]))
 
         return cast(Dict[str, Dict[str, Any]], target_info)
 

build-support/bin/generate_travis_yml.py

@@ -341,7 +341,9 @@ def linux_shard(
     }
     if load_test_config:
         setup["before_script"] = [AWS_GET_PANTS_PEX_COMMAND]
-        setup["env"].append(f"BOOTSTRAPPED_PEX_KEY_SUFFIX=py{python_version.number}.linux")
+        setup["env"].append(  # type: ignore[attr-defined]
+            f"BOOTSTRAPPED_PEX_KEY_SUFFIX=py{python_version.number}.linux"
+        )
         setup = {**setup, **CACHE_PANTS_RUN}
     if use_docker:
         setup["services"] = ["docker"]
@@ -414,8 +416,10 @@ def osx_shard(
     if osx_image is not None:
         setup["osx_image"] = osx_image
     if load_test_config:
-        setup["before_script"].append(AWS_GET_PANTS_PEX_COMMAND)
-        setup["env"].append(f"BOOTSTRAPPED_PEX_KEY_SUFFIX=py{python_version.number}.osx")
+        setup["before_script"].append(AWS_GET_PANTS_PEX_COMMAND)  # type: ignore[attr-defined]
+        setup["env"].append(  # type: ignore[attr-defined]
+            f"BOOTSTRAPPED_PEX_KEY_SUFFIX=py{python_version.number}.osx"
+        )
     return setup
 
 
@@ -449,7 +453,7 @@ def _bootstrap_env(*, python_version: PythonVersion, platform: Platform) -> List
 
 def bootstrap_linux(python_version: PythonVersion) -> Dict:
     shard = {
-        **CACHE_NATIVE_ENGINE,
+        **CACHE_NATIVE_ENGINE,  # type: ignore[arg-type]
         **linux_shard(load_test_config=False, python_version=python_version, use_docker=True),
         "name": f"Build Linux native engine and pants.pex (Python {python_version.decimal})",
         "stage": python_version.default_stage(is_bootstrap=True).value,
@@ -470,7 +474,7 @@ def bootstrap_linux(python_version: PythonVersion) -> Dict:
 
 def bootstrap_osx(python_version: PythonVersion) -> Dict:
     shard = {
-        **CACHE_NATIVE_ENGINE,
+        **CACHE_NATIVE_ENGINE,  # type: ignore[arg-type]
         # We request the oldest image we can (corresponding to OSX 10.11) for maximum compatibility.
         # We use 10.11 as a minimum to avoid https://github.com/rust-lang/regex/issues/489.
         # See: https://docs.travis-ci.com/user/reference/osx/#OS-X-Version

src/python/pants/backend/python/mixed_interpreter_constraints/py_constraints.py

@@ -11,7 +11,7 @@
 from pants.backend.python.target_types import InterpreterConstraintsField
 from pants.backend.python.util_rules.pex import PexInterpreterConstraints
 from pants.base.specs import AddressSpecs, DescendantAddresses
-from pants.engine.addresses import Addresses
+from pants.engine.addresses import Address, Addresses
 from pants.engine.console import Console
 from pants.engine.goal import Goal, GoalSubsystem, Outputting
 from pants.engine.rules import Get, MultiGet, collect_rules, goal_rule
@@ -87,7 +87,7 @@ async def py_constraints(
                 for t in (*all_expanded_targets, *all_explicit_targets)
                 if t.has_field(InterpreterConstraintsField)
             },
-            key=lambda tgt: tgt.address,
+            key=lambda tgt: cast(Address, tgt.address),
         )
 
         constraints_per_tgt = [

src/python/pants/backend/python/typecheck/mypy/rules_integration_test.py

@@ -479,7 +479,7 @@ def add(x: int, y: int) -> int:
 
     result = run_mypy(rule_runner, [py2_target, py3_target])
     assert len(result) == 2
-    py2_result, py3_result = sorted(result, key=lambda res: res.partition_description)
+    py2_result, py3_result = sorted(result, key=lambda res: res.partition_description or "")
 
     assert py2_result.exit_code == 0
     assert py2_result.partition_description == "['CPython==2.7.*', 'CPython==2.7.*,>=3.6']"
@@ -600,7 +600,7 @@ def test_source_plugin(rule_runner: RuleRunner) -> None:
             """\
             python_requirement_library(
                 name='mypy',
-                requirements=['mypy==0.782'],
+                requirements=['mypy==0.800'],
             )
 
             python_requirement_library(

src/python/pants/backend/python/typecheck/mypy/subsystem.py

@@ -12,7 +12,7 @@ class MyPy(PythonToolBase):
     options_scope = "mypy"
     help = "The MyPy Python type checker (http://mypy-lang.org/)."
 
-    default_version = "mypy==0.782"
+    default_version = "mypy==0.800"
     default_entry_point = "mypy"
     # See `mypy/rules.py`. We only use these default constraints in some situations. Technically,
     # MyPy only requires 3.5+, but some popular plugins like `django-stubs` require 3.6+. Because

src/python/pants/engine/collection.py

@@ -78,7 +78,9 @@ class Examples(DeduplicatedCollection[Example]):
     sort_input: ClassVar[bool] = False
 
     def __init__(self, iterable: Iterable[T] = ()) -> None:
-        super().__init__(iterable if not self.sort_input else sorted(iterable))
+        super().__init__(
+            iterable if not self.sort_input else sorted(iterable)  # type: ignore[type-var]
+        )
 
     def __repr__(self) -> str:
         return f"{self.__class__.__name__}({list(self._items)})"

src/python/pants/engine/target.py

@@ -786,7 +786,7 @@ def _get_field_set_fields_from_target(
     all_expected_fields: Dict[str, Type[Field]] = {
         dataclass_field.name: dataclass_field.type
         for dataclass_field in dataclasses.fields(field_set)
-        if isinstance(dataclass_field.type, type) and issubclass(dataclass_field.type, Field)  # type: ignore[unreachable]
+        if isinstance(dataclass_field.type, type) and issubclass(dataclass_field.type, Field)
     }
 
     return {

src/python/pants/goal/run_tracker_test.py

@@ -17,7 +17,7 @@
 from pants.version import VERSION
 
 
-@freeze_time(datetime.datetime(2020, 1, 1, 12, 0, 0), as_kwarg="frozen_time")
+@freeze_time(datetime.datetime(2020, 1, 1, 12, 0, 0), as_kwarg="frozen_time")  # type: ignore[call-arg]
 def test_run_tracker_timing_output(**kwargs) -> None:
     with temporary_dir() as buildroot:
         with environment_as(PANTS_BUILDROOT_OVERRIDE=buildroot):
@@ -36,7 +36,7 @@ def test_run_tracker_timing_output(**kwargs) -> None:
     "exit_code,expected",
     [(PANTS_SUCCEEDED_EXIT_CODE, "SUCCESS"), (PANTS_FAILED_EXIT_CODE, "FAILURE")],
 )
-@freeze_time(datetime.datetime(2020, 1, 10, 12, 0, 1), as_kwarg="frozen_time")
+@freeze_time(datetime.datetime(2020, 1, 10, 12, 0, 1), as_kwarg="frozen_time")  # type: ignore[call-arg]
 def test_run_information(exit_code, expected, **kwargs) -> None:
     with temporary_dir() as buildroot:
         with environment_as(PANTS_BUILDROOT_OVERRIDE=buildroot):

src/python/pants/option/ranked_value.py

@@ -6,7 +6,7 @@
 from dataclasses import dataclass
 from enum import Enum
 from functools import total_ordering
-from typing import Any, Dict, Iterator, List, Optional, Tuple, Union
+from typing import Any, Dict, Iterator, List, Optional, Tuple, Union, cast
 
 
 @total_ordering
@@ -27,10 +27,10 @@ def __new__(cls, rank: int, display: str) -> Rank:
         member._rank = rank
         return member
 
-    def __lt__(self, other: Any) -> Union["NotImplemented", bool]:
+    def __lt__(self, other: Any) -> bool:
         if type(other) != Rank:
             return NotImplemented
-        return self._rank < other._rank
+        return cast(bool, self._rank < other._rank)
 
 
 Value = Union[str, int, float, None, Dict, Enum, List]

src/python/pants/util/meta.py

@@ -199,6 +199,6 @@ def new_setattr(self, key: str, value: Any) -> None:
     cls._freeze_instance = freeze_instance
     cls._unfreeze_instance = unfreeze_instance
     cls.__init__ = new_init
-    cls.__setattr__ = new_setattr
+    cls.__setattr__ = new_setattr  # type: ignore[assignment]
 
     return cls