Scramble up the glyphs you've selected

scrambleSelectedGlyphs.py

# menuTitle : Scramble Selected Glyphs

from random import choice

f = CurrentFont()

# grab selection
gs = f.selectedGlyphNames

new_assign ={}
accounted = []
for g_name in gs:
    g = f[g_name]
    
    # make temp glyphs
    temp_name = g_name + "_temp"
    f.insertGlyph(g, name=temp_name)
    
    # choose a target glyph to scramble to, at random
    target_g = choice(gs)
    while target_g in accounted:
        target_g = choice(gs)
        
    # capture unicode of the target glyph to reinstate later
    uni = f[target_g].unicodes
    
    # organize what's going where, and unicodes to keep
    new_assign.update({target_g : [temp_name, uni]})
    accounted.append(target_g)
    
# slip the temp glyphs into their final slot, assign unicodes, and delete temps
for target_g, [temp_name, uni] in new_assign.items():
    f.insertGlyph(f[temp_name], name=target_g)
    f[target_g].unicodes = uni
    f.removeGlyph(temp_name)

f.changed()