Fix linter errors

Author: gonzalocasas

src/compas_fab/backends/ros/client.py

@@ -169,7 +169,6 @@ def load_robot(self, load_geometry=False, urdf_param_name='/robot_description',
 
         return Robot(model, semantics=semantics, client=self)
 
-
     def inverse_kinematics(self, frame, base_link, group,
                            joint_names, joint_positions, avoid_collisions=True,
                            constraints=None, attempts=8,

src/compas_fab/backends/ros/messages/geometry_msgs.py

@@ -97,7 +97,6 @@ def from_msg(cls, msg):
         return cls(x, y, z)
 
 
-
 class Transform(ROSmsg):
     """http://docs.ros.org/api/geometry_msgs/html/msg/Transform.html
     """

src/compas_fab/robots/inertia.py

@@ -48,8 +48,8 @@ def __init__(self, inertia_tensor, mass, center_of_mass):
     def principal_moments(self):
         """Returns the diagonal elements of the inertia tensor [ixx, iyy, izz]
         """
-        I = self.inertia_tensor
-        return [I[0][0], I[1][1], I[2][2]]
+        inertia_tensor = self.inertia_tensor
+        return [inertia_tensor[0][0], inertia_tensor[1][1], inertia_tensor[2][2]]
 
     def __repr__(self):
         return "Inertia({0}, {1}, {2})".format(self.inertia_tensor, self.mass, self.center_of_mass)
@@ -59,4 +59,3 @@ def calculate_inertia_tensor(cls, mesh):
         """Returns the inertia tensor.
         """
         raise NotImplementedError
-

src/compas_fab/robots/wrench.py

@@ -3,8 +3,6 @@
 import math
 
 import compas
-from compas.geometry import Frame
-from compas.geometry import Transformation
 from compas.geometry import Vector
 from compas.geometry import cross_vectors
 
@@ -284,7 +282,7 @@ def __eq__(self, other, tol=1e-05):
             if math.fabs(a - b) > tol:
                 return False
         return True
-    
+
     def __ne__(self, other, tol=1e-05):
         return not self.__eq__(other, tol)
 
@@ -387,4 +385,3 @@ def gravity_compensated(self, ft_sensor_frame, mass, center_of_mass):
         torque_gravity = Vector(*cross_vectors((center_of_mass * mass), gravity_vector_FTSCS))
 
         return Wrench(self.force - force_gravity, self.torque - torque_gravity)
-