more typing

hypothesis-python/src/hypothesis/core.py

@@ -35,6 +35,7 @@
     TypeVar,
     Union,
     overload,
+    Iterable,
 )
 from unittest import TestCase
 
@@ -321,7 +322,7 @@ def accept(test):
     return accept
 
 
-def encode_failure(choices):
+def encode_failure(choices: Iterable[ChoiceT]) -> bytes:
     blob = choices_to_bytes(choices)
     compressed = zlib.compress(blob)
     if len(compressed) < len(blob):
@@ -687,7 +688,7 @@ def skip_exceptions_to_reraise():
     return tuple(sorted(exceptions, key=str))
 
 
-def failure_exceptions_to_catch():
+def failure_exceptions_to_catch() -> tuple[type[BaseException], ...]:
     """Return a tuple of exceptions meaning 'this test has failed', to catch.
 
     This is intended to cover most common test runners; if you would

hypothesis-python/src/hypothesis/internal/escalation.py

@@ -16,7 +16,7 @@
 from functools import partial
 from inspect import getframeinfo
 from pathlib import Path
-from types import ModuleType
+from types import ModuleType, TracebackType
 from typing import Callable, NamedTuple, Optional
 
 import hypothesis
@@ -57,7 +57,9 @@ def accept(filepath: str) -> bool:
 is_hypothesis_file = belongs_to(hypothesis)
 
 
-def get_trimmed_traceback(exception=None):
+def get_trimmed_traceback(
+    exception: Optional[BaseException] = None,
+) -> Optional[TracebackType]:
     """Return the current traceback, minus any frames added by Hypothesis."""
     if exception is None:
         _, exception, tb = sys.exc_info()
@@ -67,9 +69,10 @@ def get_trimmed_traceback(exception=None):
     # was raised inside Hypothesis. Additionally, the environment variable
     # HYPOTHESIS_NO_TRACEBACK_TRIM is respected if nonempty, because verbose
     # mode is prohibitively slow when debugging strategy recursion errors.
+    assert hypothesis.settings.default is not None
     if (
         tb is None
-        or os.environ.get("HYPOTHESIS_NO_TRACEBACK_TRIM", None)
+        or os.environ.get("HYPOTHESIS_NO_TRACEBACK_TRIM")
         or hypothesis.settings.default.verbosity >= hypothesis.Verbosity.debug
         or (
             is_hypothesis_file(traceback.extract_tb(tb)[-1][0])

hypothesis-python/src/hypothesis/internal/reflection.py

@@ -82,7 +82,7 @@ def _clean_source(src: str) -> bytes:
     return "\n".join(x.rstrip() for x in src.splitlines() if x.rstrip()).encode()
 
 
-def function_digest(function):
+def function_digest(function: Any) -> bytes:
     """Returns a string that is stable across multiple invocations across
     multiple processes and is prone to changing significantly in response to
     minor changes to the function.