Select some contours, and run this script to send those contours to a different glyph of your choosing.

sendSelectedContoursToGlyph.py

# menuTitle : Send Selection to Glyph

from vanilla import EditText, Window, Button
from mojo.UI import AskString, StatusInteractivePopUpWindow, CurrentGlyphWindow
from defconAppKit.windows.baseWindow import BaseWindowController
from AppKit import NSColor

f = CurrentFont()
g = CurrentGlyph()

def getGlyphEditorRectAndScreen(editorWindow):
    screen = editorWindow.w.getNSWindow().screen()
    nsWindow = editorWindow.w.getNSWindow()
    scrollView = editorWindow.getGlyphView().enclosingScrollView()
    rectInWindowCoords = scrollView.convertRect_toView_(scrollView.frame(), None)
    rectInScreenCoords = nsWindow.convertRectToScreen_(rectInWindowCoords)
    (screenX, screenY), (screenWidth, screenHeight) = screen.frame()
    (x, y), (w, h) = rectInScreenCoords
    y = -(y + h)
    return (x, y, w, h), screen

class GlyphSender(BaseWindowController):
    
    def __init__(self):
        
        margin = 8
        text_height = 22
        text_width = 110
        gutter = margin - 3
        button_width = text_width
        button_height = text_height
        window_height = margin*2 + text_height + gutter + button_height + 2
        window_width = margin*2 + text_width
        
        editorWindow = CurrentGlyphWindow()
        (editorX, editorY, editorW, editorH), screen = getGlyphEditorRectAndScreen(editorWindow)
        x = editorX + ((editorW - window_width) / 2)
        y = editorY + ((editorH - window_height) / 2)
        
        self.w = StatusInteractivePopUpWindow((window_width, window_height))
        self.w.center()
        
        self.chosen_glyph = str(g.name)
        
        self.w.glyph_input = EditText(
            (margin, margin, text_width, text_height),
            callback=self.editTextCallback,
            text=self.chosen_glyph
            )
    
        g_i_NS = self.w.glyph_input.getNSTextField()
        g_i_NS.setBackgroundColor_(NSColor.colorWithCalibratedRed_green_blue_alpha_(0.9, 0.9, 0.9, 1))
        g_i_NS.setAlignment_(2)
        g_i_NS.setFocusRingType_(1)
        g_i_NS.becomeFirstResponder()
        
        self.w.throw_button = Button(
            (margin, margin + text_height + gutter, button_width, button_height), 
            "Send", 
            callback=self.throwButtonCallback)
            
        self.w.setDefaultButton(self.w.throw_button)
        
        self.w.close_button = Button((window_width + 20, window_height + 20, 1, 1), "", callback=self.closeCallback)
        self.w.close_button.bind(chr(27), [])
        
        self.w.open()
        
    def editTextCallback(self, sender):
        self.chosen_glyph = str(sender.get())
        self.w.throw_button.setTitle("Send to %s" % self.chosen_glyph)
        
    def throwButtonCallback(self, sender):
        if g is not None:
            try:
                with g.undo('Send Selection to Glyph (%s)' % g.name):
                    for c in g.selectedContours:
                        copy = c.copy()
                        if not self.chosen_glyph in f.keys():
                            f.newGlyph(self.chosen_glyph)
                        f[self.chosen_glyph].appendContour(copy)
                        g.removeContour(c)                        
                        g.changed()
                    
                    g.selectedContours = ()
                    g.changed()
                    self.w.close()
                    
            except ValueError:
                g.selectedContours = ()                
                g.changed()
                self.w.close()
            
        else:
            g.selectedContours = ()
            g.changed()
            self.w.close()
            
    def closeCallback(self, sender):
        self.w.close()
        
GlyphSender()