slightly improve typing

rebound/__init__.pyi

@@ -1,22 +1,36 @@
+from ctypes import CDLL
+
 from .interruptible_pool import InterruptiblePool as InterruptiblePool
 from .particle import Particle as Particle
 from .plotting import OrbitPlot as OrbitPlot
-from .simulation import Orbit as Orbit, Simulation as Simulation, Variation as Variation, reb_simulation_integrator_mercurius as reb_simulation_integrator_mercurius, reb_simulation_integrator_saba as reb_simulation_integrator_saba, reb_simulation_integrator_sei as reb_simulation_integrator_sei, reb_simulation_integrator_whfast as reb_simulation_integrator_whfast
+from .simulation import Orbit as Orbit, Simulation as Simulation, Variation as Variation, \
+    reb_simulation_integrator_mercurius as reb_simulation_integrator_mercurius, \
+    reb_simulation_integrator_saba as reb_simulation_integrator_saba, \
+    reb_simulation_integrator_sei as reb_simulation_integrator_sei, \
+    reb_simulation_integrator_ias15 as reb_simulation_integrator_ias15, \
+    reb_simulation_integrator_whfast as reb_simulation_integrator_whfast
 from .simulationarchive import SimulationArchive as SimulationArchive
-from typing import Any
 
-__libpath__: Any
-clibrebound: Any
-__build__: Any
-__githash__: Any
+__libpath__: str
+clibrebound: CDLL
+__version__: str
+__build__: str
+__githash__: str
+
 
 class SimulationError(Exception): ...
-class Encounter(Exception): ...
-class Collision(Exception): ...
-class Escape(Exception): ...
-class NoParticles(Exception): ...
-class ParticleNotFound(Exception): ...
 
-# Names in __all__ with no definition:
-#   __version__
-#   reb_simulation_integrator_ias15
+
+class Encounter(Exception): ...
+
+
+class Collision(Exception): ...
+
+
+class Escape(Exception): ...
+
+
+class NoParticles(Exception): ...
+
+
+class ParticleNotFound(Exception): ...

rebound/simulation.pyi

@@ -269,7 +269,7 @@ class Simulation(Structure):
 
     def cite(self) -> None: ...
 
-    visualization: Any = ...
+    visualization: int = ...
 
     def getWidget(self, **kwargs: Any): ...
 

rebound/simulationarchive.pyi

@@ -15,7 +15,7 @@ class SimulationArchive(Structure):
     tmin: float
     tmax: float
 
-    def __init__(self, filename: Any, setup: Optional[Callable] = ..., setup_args: Sequence = ...,
+    def __init__(self, filename: str, setup: Optional[Callable] = ..., setup_args: Sequence = ...,
                  process_warnings: bool = ..., reuse_index: Optional[SimulationArchive] = ...) -> None: ...
 
     def __del__(self) -> None: ...