Fixes F821 and E721 errors.

Author: peterdsharpe

aerosandbox/aerodynamics/aero_3D/aero_buildup.py

@@ -7,14 +7,19 @@
 from aerosandbox.aerodynamics.aero_3D.aero_buildup_submodels.fuselage_aerodynamics_utilities import (
     critical_mach,
     jorgensen_eta,
+    fuselage_base_drag_coefficient,
+    fuselage_form_factor,
 )
 from aerosandbox.library.aerodynamics import transonic
 import aerosandbox.library.aerodynamics as aerolib
 from aerosandbox.aerodynamics.aero_3D.aero_buildup_submodels.softmax_scalefree import (
     softmax_scalefree,
 )
 from dataclasses import dataclass
-from typing import Literal
+from typing import Literal, TYPE_CHECKING
+
+if TYPE_CHECKING:
+    from aerosandbox.geometry import ControlSurface
 
 
 class AeroBuildup(ExplicitAnalysis):

aerosandbox/aerodynamics/aero_3D/lifting_line.py

@@ -8,10 +8,14 @@
 from aerosandbox.aerodynamics.aero_3D.singularities.point_source import (
     calculate_induced_velocity_point_source,
 )
-from typing import Callable
+from typing import Callable, TYPE_CHECKING
 from aerosandbox.aerodynamics.aero_3D.aero_buildup import AeroBuildup
 from aerosandbox.numpy.typing import Vectorizable
 from dataclasses import dataclass
+import aerosandbox.geometry.mesh_utilities as mesh_utils
+
+if TYPE_CHECKING:
+    from aerosandbox.geometry import Airfoil, ControlSurface
 
 
 ### Define some helper functions that take a vector and make it a Nx1 or 1xN, respectively.

aerosandbox/aerodynamics/aero_3D/nonlinear_lifting_line.py

@@ -8,7 +8,11 @@
     calculate_induced_velocity_point_source,
 )
 import aerosandbox.numpy as np
-from typing import Any, Callable
+from typing import Any, Callable, TYPE_CHECKING
+import aerosandbox.geometry.mesh_utilities as mesh_utils
+
+if TYPE_CHECKING:
+    from aerosandbox.geometry import Airfoil, ControlSurface
 
 
 ### Define some helper functions that take a vector and make it a Nx1 or 1xN, respectively.

aerosandbox/aerodynamics/aero_3D/test_aero_3D/test_lifting_line.py

@@ -6,5 +6,6 @@
 #     return analysis.run()
 
 if __name__ == "__main__":
-    test_lifting_line()
+    # test_lifting_line()  # Function is commented out above
     # pytest.main()
+    pass

aerosandbox/aerodynamics/aero_3D/vortex_lattice_method.py

@@ -7,6 +7,7 @@
 )
 from typing import Any, Callable
 import copy
+import aerosandbox.geometry.mesh_utilities as mesh_utils
 
 
 ### Define some helper functions that take a vector and make it a Nx1 or 1xN, respectively.

aerosandbox/common.py

@@ -37,8 +37,8 @@ def __eq__(self, other):
         if self is other:  # If they point to the same object in memory, they're equal
             return True
 
-        if type(self) != type(
-            other
+        if not isinstance(
+            other, type(self)
         ):  # If they are of different types, they cannot be equal
             return False
 

aerosandbox/dynamics/point_mass/common_point_mass.py

@@ -1,7 +1,7 @@
 import aerosandbox.numpy as np
 from aerosandbox.common import AeroSandboxObject
 from abc import ABC, abstractmethod
-from typing import Literal, Sequence
+from typing import Literal, Sequence, TYPE_CHECKING
 from aerosandbox import (
     MassProperties,
     Opti,
@@ -15,6 +15,9 @@
 import copy
 from aerosandbox.numpy.typing import Vectorizable, Vector
 
+if TYPE_CHECKING:
+    from pyvista import PolyData
+
 
 class _DynamicsPointMassBaseClass(AeroSandboxObject, ABC):
     @abstractmethod

aerosandbox/geometry/airfoil/airfoil.py

@@ -8,6 +8,11 @@
     get_file_coordinates,
 )
 from aerosandbox.library.aerodynamics import transonic
+from typing import TYPE_CHECKING
+
+if TYPE_CHECKING:
+    from aerosandbox.geometry.airfoil.kulfan_airfoil import KulfanAirfoil
+    from aerosandbox.geometry import ControlSurface
 from aerosandbox.modeling.splines.hermite import (
     cubic_hermite_patch,
 )

aerosandbox/geometry/airfoil/kulfan_airfoil.py

@@ -6,6 +6,10 @@
 )
 import warnings
 from aerosandbox.numpy.typing import Vectorizable, ArrayLike, Scalar
+from typing import TYPE_CHECKING
+
+if TYPE_CHECKING:
+    from aerosandbox.geometry import ControlSurface
 
 
 class KulfanAirfoil(Airfoil):

aerosandbox/geometry/airplane.py

@@ -1,6 +1,6 @@
 import itertools
 from aerosandbox import AeroSandboxObject
-from typing import Any, Literal, Sequence
+from typing import Any, Literal, Sequence, TYPE_CHECKING
 import aerosandbox.numpy as np
 import aerosandbox.geometry.mesh_utilities as mesh_utils
 from aerosandbox.geometry.wing import Wing
@@ -10,6 +10,10 @@
 import copy
 from pathlib import Path
 
+if TYPE_CHECKING:
+    import matplotlib.axes
+    from cadquery import Workplane
+
 
 class Airplane(AeroSandboxObject):
     """