Updated

Scripts/Animation/MotionCapHelper/extra_scripts/plugin interact(与插件交互).py

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+'''
+this is an example of how you set hotkey or use scripts to drive this plugin's cmds.
+if you know python and pyside2,go see codes and .ui file to find what you need.
+the most simple usage is to drive a qt pushbutton.(which is exactly what you did when you hit a button in plugin ui.)
+and you might need QLineEdit.setText() to set str in those text field.
+anyway,go check qt wiki :https://doc.qt.io/qtforpython-5/PySide2/QtWidgets/QWidget.html#qwidget
+have fun scripting.
+'''
+
+import maya.cmds as cmds
+
+cmds.moCapHelper_eval(s ="ui.arb_stickyDelButton.click()" )

Scripts/Animation/MotionCapHelper/extra_scripts/select display layer objs(选择显示层物体).py

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+import maya.cmds as cmds
+import maya.mel as mel
+
+curlayer = cmds.editDisplayLayerGlobals( query=True, cdl=True )
+if curlayer =="defaultLayer" :
+    raise Exception("using default layer!")
+else:
+    slist = cmds.editDisplayLayerMembers(curlayer,query=True )
+    print(slist)
+    cmds.select( clear=True )
+    cmds.select(slist, visible=True )
+
+    mel.eval("syncChannelBoxFcurveEd;")
+    mel.eval("syncChannelBoxFcurveEd;")
+    mel.eval("syncChannelBoxFcurveEd;")

Scripts/Animation/MotionCapHelper/extra_scripts/trace back(追踪对象或层).py

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+import maya.cmds as cmds
+objs = cmds.ls(selection = True,type = "dagNode",long = True)
+
+selectobjflag = True
+selectmultiobjflag = False
+if len(objs) == 0:
+    selectobjflag = False
+else:
+    if len(objs) != 1:
+        selectmultiobjflag = True
+    
+
+if objs == None:
+    selectobjflag = False
+
+curves = cmds.keyframe(query = True , selected = True , name  = True)
+print(type(curves))
+selectkeyflag = True
+if curves == None:
+    selectkeyflag = False
+
+if selectobjflag:
+    if selectkeyflag:
+        nodes = set()
+        for cv in curves:
+            node = cmds.listConnections(cv)[0]
+            nodes.add(node)
+        cmds.select(clear = True)
+        cmds.select(nodes)
+        print("TRACE BACK OBJS FROM KEY: " + str(nodes))
+    else:
+        obj = cmds.ls(objs[0])[0]
+        
+        layer = cmds.ls(cmds.listConnections(obj,t = "displayLayer"))
+        if len(layer) == 0:
+            print("this obj has no layer,or you have selected multiple objs.")
+        elif cmds.editDisplayLayerGlobals(cdl = True,q = True) == "defaultLayer":
+            print("no display layer selected,trace back won\'t work.")
+        else:
+            cmds.editDisplayLayerGlobals(cdl = layer[0])
+            
+            if selectmultiobjflag:
+                print("TRACE BACK LAYER FROM OBJ: " + layer[0] + "BUT WITH MULTIPLE OBJS SELECTED,SO RESULE IS UNEXPECTED.")
+            else:
+                print("TRACE BACK LAYER FROM OBJ: " + layer[0] )
+else :
+    print("no objs selected!")