add yapf style and apply yapf to format all Python files

This recreates pull request #2192

examples/pybullet/examples/test.py

@@ -2,10 +2,9 @@
 #but running from github repo instead
 import os, inspect
 currentdir = os.path.dirname(os.path.abspath(inspect.getfile(inspect.currentframe())))
-print ("current_dir=" + currentdir)
-parentdir = os.path.join(currentdir,"../gym")
-os.sys.path.insert(0,parentdir)
-
+print("current_dir=" + currentdir)
+parentdir = os.path.join(currentdir, "../gym")
+os.sys.path.insert(0, parentdir)
 
 import pybullet
 import pybullet_data
@@ -14,34 +13,34 @@ import time
 
 #choose connection method: GUI, DIRECT, SHARED_MEMORY
 pybullet.connect(pybullet.GUI)
-pybullet.loadURDF(os.path.join(pybullet_data.getDataPath(),"plane.urdf"),0,0,-1)
+pybullet.loadURDF(os.path.join(pybullet_data.getDataPath(), "plane.urdf"), 0, 0, -1)
 #load URDF, given a relative or absolute file+path
-obj = pybullet.loadURDF(os.path.join(pybullet_data.getDataPath(),"r2d2.urdf"))
+obj = pybullet.loadURDF(os.path.join(pybullet_data.getDataPath(), "r2d2.urdf"))
 
-posX=0
-posY=3
-posZ=2
-obj2 = pybullet.loadURDF(os.path.join(pybullet_data.getDataPath(),"kuka_iiwa/model.urdf"),posX,posY,posZ)
+posX = 0
+posY = 3
+posZ = 2
+obj2 = pybullet.loadURDF(os.path.join(pybullet_data.getDataPath(), "kuka_iiwa/model.urdf"), posX,
+                         posY, posZ)
 
 #query the number of joints of the object
 numJoints = pybullet.getNumJoints(obj)
 
-print (numJoints)
+print(numJoints)
 
 #set the gravity acceleration
-pybullet.setGravity(0,0,-9.8)
+pybullet.setGravity(0, 0, -9.8)
 
 #step the simulation for 5 seconds
 t_end = time.time() + 5
 while time.time() < t_end:
-	pybullet.stepSimulation()
-	posAndOrn = pybullet.getBasePositionAndOrientation(obj)
-	print (posAndOrn)
+  pybullet.stepSimulation()
+  posAndOrn = pybullet.getBasePositionAndOrientation(obj)
+  print(posAndOrn)
 
-print ("finished")
+print("finished")
 #remove all objects
 pybullet.resetSimulation()
 
 #disconnect from the physics server
 pybullet.disconnect()
-