Add a missing interface

This was mentioned in the documentation but not actually implemented.

Author: aMarcireau

astrometry/__init__.py

@@ -227,10 +227,13 @@ def __exit__(
         value: typing.Optional[BaseException],
         traceback: typing.Optional[types.TracebackType],
     ) -> bool:
+        self.close()
+        return False
+
+    def close(self):
         if self.inner is not None:
             self.inner.close()
             self.inner = None
-        return False
 
     def solve(
         self,

pyproject.toml

@@ -8,7 +8,7 @@ authors = [
 ]
 requires-python = ">=3.9"
 dependencies = ["requests>=1.26"]
-version = "4.2.0"
+version = "4.2.1"
 
 [project.urls]
 homepage = "https://github.com/neuromorphicsystems/astrometry/"

tests/test_memory.py

@@ -63,11 +63,11 @@ def size_to_string(size: int) -> str:
         )
         assert solution.has_match()
         del solution
-        memory_sample = process.memory_full_info().uss
-        memory_samples[index] = memory_sample
-        print(
-            f"(repeated solver allocation with context manager) solve {index + 1} / {SOLVES}, memory usage: {size_to_string(memory_sample)}"
-        )
+    memory_sample = process.memory_full_info().uss
+    memory_samples[index] = memory_sample
+    print(
+        f"(repeated solver allocation with context manager) solve {index + 1} / {SOLVES}, memory usage: {size_to_string(memory_sample)}"
+    )
 deltas = numpy.diff(memory_samples)
 repeated_solver_allocation_with_context_manager_leak = (
     size_to_string(int(numpy.min(deltas[deltas >= 0]))),
@@ -91,6 +91,7 @@ def size_to_string(size: int) -> str:
         solution_parameters=astrometry.SolutionParameters(),
     )
     assert solution.has_match()
+    solver.close()
     del solution
     del solver
     memory_sample = process.memory_full_info().uss
@@ -157,6 +158,7 @@ def size_to_string(size: int) -> str:
             ),
         )
         del solution
+        del stars
         memory_sample = process.memory_full_info().uss
         memory_samples[index] = memory_sample
         print(